6 ms·

Ask HN: What's your most-used function that you wrote yourself?

• owyn 15y ago
  Here is one of my PHP standards... I prefer this to more complex template systems, although the idea is borrowed from Symfony I think. The style I try to adhere to is to only use simple variables and loops in html templates. This is the basic idea: function render($data, $templateFile) { extract( $data ); ob_start(); require $templateFile; echo ob_get_clean(); } It turns an array (or DTO object using get_object_vars) into global variables in the template, so this code in a controller $data->foo = "bar"; Is accessed in the template like this: <?= $foo ?>
• smoove 15y ago
  def random(): return 4
  • jpitz 15y ago
    Randall?
    • smoove 15y ago
      i wish...
  • jawns 15y ago
    http://xkcd.com/221/ http://xkcd.com/221/
    • smoove 15y ago
      Oh. my. god. there is a guy on the internet making comics about my life. oO
  • liotier 15y ago
    Nine is also a good choice - http://dilbert.com/strips/comic/2001-10-25 http://dilbert.com/strips/comic/2001-10-25
• dholowiski 15y ago
  connect_to_db(); in PHP. it knows if im in a development or production environment, knows the proper username and password, and connects. Very basic i know, and im sure everyone has written a similar function, but super useful.
• fuzzmeister 15y ago
  PHP function to perform a basic cURL request and return the result. Got a little bit tired of writing "curl_setopt(...".
  • dmpatierno 15y ago
    Typically this is what file_get_contents() is for (with fopen_wrappers enabled) if you just want a simple GET.
    • troels 15y ago
      In newer versions of PHP, you can use `stream_context_create` to make post requests and more, using `file_get_contents`
    • deleted 15y ago
      [deleted]
    • aDemoUzer 15y ago
      My solutions: function getUrlContents($url, $showError = true) { for($x = 0; $x < 5 && !$content; $x++) $content = @file_get_contents($url); if(!$content && $showError) br("Unable to retrieve content for '<B>$url</B>'."); return $content; } function getUrlHandle($url, $context = NULL, $showError = true, $retries = 5) { $url = str_replace(' ', '%20', $url); for($x = 0; $x < $retries && !$handle; $x++) if($context) $handle = @fopen($url, 'r', false, $context); else $handle = @fopen($url, 'r'); if(!$handle && $showError) br("\t - Unable to access '<B>$url</B>'."); return $handle; } function br($text = '') { echo $text; if($_SERVER['REQUEST_URI']) echo '<BR>'; echo "\n"; }
• frou_dh 15y ago
  It annoyed me that in C#, you have to check whether someone is subscribed to an event before raising it. An Extension Method: public static bool CheckedRaise<T>(this EventHandler<T> eh, object sender, T e) where T : EventArgs { bool check = eh != null; if (check) eh(sender, e); return check; }
  • noblethrasher 15y ago
    You probably already know this but another trick is just to assign an "empty" lambda to the event. public event SomeDelegate MyEvent = (sender, e) => {}; Or better yet public event SomeDelegate MyEvent = delegate {};
    • frou_dh 15y ago
      Yep, but with either of those, it can still be set back to null :)
      • noblethrasher 15y ago
        True. I don't use events much but when I do I use the following pattern: private SomeDelegate _myEvent = delegate {}; public event SomeDelegate MyEvent { add { _myEvent += value; } remove { _myEvent -= value; } }
        • frou_dh 15y ago
          If I'm not mistaken, that has the same semantics as the standard one line event definition, i.e.: public event EventHandler MyEvent; // Inside the class, MyEvent is bound to a multicast delegate. // Outside the class, MyEvent is bound to an auto-generated add/remove mechanism. // So MyEvent can only be set to null or invoked from inside the class.
          • noblethrasher 15y ago
            Hmmm, you're right. That's two (C# related) things I learned today.
• phamilton 15y ago
  It really only condenses 2 calls down to one, but since I never change some of the parameters, it saves me a bit of time. def run( command ): process = subprocess.Popen( command, stdout=subprocess.PIPE, stderr=subprocess.PIPE ) return process.communicate()
• code_duck 15y ago
  A PHP 'get or else' which replaces $some_var = isset($array[$key]) ? $array[$key] : $default;
• dmix 15y ago
  A designers most used function: In SCSS I use a very simple mixin for rounded corners, something I use frequently when designing sites. @mixin radius($dist) { border-radius:$dist; -moz-border-radius:$dist; -webkit-border-radius:$dist; -khtml-border-radius:$dist; -webkit-background-clip:padding-box; } Then in the class just add: @include radius(5px);
  • mgeraci 15y ago
    You might like this boilerplate SASS file that I made to handle a bunch of this type of thing: https://github.com/mgeraci/Sass-Boilerplate https://github.com/mgeraci/Sass-Boilerplate I also see this post explaining the presence of the -webkit-background-clip (http://tumble.sneak.co.nz/post/928998513/fixing-the-background-bleed http://tumble.sneak.co.nz/post/928998513/fixing-the-backgrou...), but I don't see that behavior in Safari 5. Potentially fixed? If not, I would certainly add that to my boilerplate.
  • nathanappere 15y ago
    Bourbon does this and much more : https://github.com/thoughtbot/bourbon https://github.com/thoughtbot/bourbon
  • georgefox 15y ago
    Shouldn't border-radius (i.e., no vendor prefix) be last?
• Vindexus 15y ago
  Probably this one, which I use for testing function becho($value, $key = NULL) { echo '<br /><span style="background: #FFFFFF; color: #000000;">' . (NULL != $key ? $key . ' = ' : '') . $value . '</span>'; } I also like this one function s($num) { return $num == 1 ? '' : 's'; } Which I use like echo 'Showing ' . $results . ' result' . s($results) . '.';
  • clyfe 15y ago
    function echo_r($x){ echo '<pre>'; print_r($x); echo '</pre>'; }
• deleted 15y ago
  [deleted]
• dgallagher 15y ago
  I wrote this simple Python function to create random strings from various character sets. I wish every NES game that had a password-based save used 'alpha_numeric_hardtoconfuse_lowercase'. There's no telling how many times I've mixed up 1, I, i, and l, pending on the crappy font being used. Same goes with hand-written Windows activation keys. # encoding: utf-8 import random CHARACTER_SETS = { 'alpha': 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', # 52 'alpha_lowercase': 'abcdefghijklmnopqrstuvwxyz', # 26 'alpha_uppercase': 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', # 26 'alpha_numeric': 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', # 62 'alpha_numeric_lowercase': 'abcdefghijklmnopqrstuvwxyz0123456789', # 36 'alpha_numeric_uppercase': 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', # 36 'alpha_hardtoconfuse': 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ', # 47 --- Omits: i, l, o, I, O 'alpha_hardtoconfuse_lowercase': 'abcdefghjkmnpqrstuvwxyz', # 23 --- Omits: i, l, o 'alpha_hardtoconfuse_uppercase': 'ABCDEFGHJKLMNPQRSTUVWXYZ', # 24 --- Omits: I, O 'alpha_numeric_hardtoconfuse': 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789', # 55 --- Omits: i, l, o, I, O, 0, 1 'alpha_numeric_hardtoconfuse_lowercase': 'abcdefghjkmnpqrstuvwxyz23456789', # 31 --- Omits: i, l, o, 0, 1 'alpha_numeric_hardtoconfuse_uppercase': 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789', # 32 --- Omits: I, O, 0, 1 'alpha_consonants': 'bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ', # 42 --- Omits: a, e, i, o, u, A, E, I, O, U 'alpha_consonants_lowercase': 'bcdfghjklmnpqrstvwxyz', # 21 --- Omits: a, e, i, o, u 'alpha_consonants_uppercase': 'BCDFGHJKLMNPQRSTVWXYZ', # 21 --- Omits: A, E, I, O, U 'alpha_numeric_consonants': 'bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ0123456789', # 52 --- Omits: a, e, i, o, u, A, E, I, O, U 'alpha_numeric_consonants_lowercase': 'bcdfghjklmnpqrstvwxyz0123456789', # 31 --- Omits: a, e, i, o, u 'alpha_numeric_consonants_uppercase': 'BCDFGHJKLMNPQRSTVWXYZ0123456789', # 31 --- Omits: A, E, I, O, U 'alpha_consonants_hardtoconfuse': 'bcdfghjkmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ', # 41 --- Omits: a, e, i, l, o, u, A, E, I, O, U 'alpha_consonants_hardtoconfuse_lowercase': 'bcdfghjkmnpqrstvwxyz', # 20 --- Omits: a, e, i, l, o, u 'alpha_consonants_hardtoconfuse_uppercase': 'BCDFGHJKLMNPQRSTVWXYZ', # 21 --- Omits: A, E, I, O, U 'alpha_numeric_consonants_hardtoconfuse': 'bcdfghjkmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ23456789', # 49 --- Omits: a, e, i, l, o, u, A, E, I, O, U, 0, 1 'alpha_numeric_consonants_hardtoconfuse_lowercase': 'bcdfghjkmnpqrstvwxyz23456789', # 28 --- Omits: a, e, i, l, o, u, 0, 1 'alpha_numeric_consonants_hardtoconfuse_uppercase': 'BCDFGHJKLMNPQRSTVWXYZ23456789', # 29 --- Omits: A, E, I, O, U, 0, 1 'binary': '01', # 2 --- Base-2 'decimal': '0123456789', # 10 --- Base-10 'hexadecimal_upper': '0123456789ABCDEF', # 16 --- Base-16 'hexadecimal_lower': '0123456789abcdef', # 16 --- Base-16 'octal': '01234567', # 8 --- Base-8 } def random_string(length=32, characters=CHARACTER_SETS['alpha_numeric']): random.seed() return ''.join(random.choice(characters) for x in range(length))
• klochner 15y ago
  history function for ruby console (irb) sessions: def history(num=100) h = Readline::HISTORY.to_a start = [0,h.size-num-1].max h.zip((0..h.size).to_a)[start...h.size].each do |cmd,i| puts " #{(i).to_s.rjust(4)} #{cmd}" end end I keep it in my .irbrc file, really useful to avoid stepping through command history to find previous commands.
• alts 15y ago
  Haskell: (\>) x f = f x Allows me to write in a more readable manner [1..10] \> map (*2) \> filter (<5)
  • contextfree 15y ago
    Inspired by F#'s |> (which was of course inspired by Unix pipes) ?
  • nxn 15y ago
    Heh, wrote the same function, except called mine $> because it's really just a flipped $.
• patio11 15y ago
  Possibly the most critical code in my application: #Non-destructive. Returns the input array/list in randomized order. Uses approximately O(n) time and O(n) space. def self.shuffle_array(array) shallow_copy = array.map {|a| a} shallow_copy.size.downto(1) {|n| shallow_copy.push(shallow_copy.delete_at(rand(n))) shallow_copy end
  • rue 15y ago
    Hopefully you've since migrated to Array#shuffle.
    • patio11 15y ago
      "If it ain't broke..."
  • ssp 15y ago
    Doesn't that run in quadratic time - or can delete_at() somehow avoid copying all the tail elements in the array?
    • T-hawk 15y ago
      I know nothing about Ruby, but it's possible if a language implements an array as a linked list so the tail elements don't actually move. (At any rate, I hardly think we're worried about a modern computer workload of at most 25^2 string operations.)
      • ssp 15y ago
        In that case, it couldn't find the element to delete in constant time.
  • klochner 15y ago
    Your function isn't close to linear. Here are my benchmarks for 10 iterations of sorting: patio11: 100000 -- 120.469834 10000 -- 1.218803 1000 -- 0.019961 100 -- 0.000958 Array.shuffle: 100000 -- 0.054125 10000 -- 0.002993 1000 -- 0.000302 100 -- 4.1e-05
• cultureulterior 15y ago
  SetDirectory[ToFileName[({"FileName"} /. NotebookInformation[EvaluationNotebook[]])[[1,1]]]] Mathematica code. Sets the CWD for file operations for a notebook to the same directory the current file is in. This is not default for Mac OSX.
• ramidarigaz 15y ago
  A little bit of python that makes it easier to do shell-style scripting. def call(cmd): args = shlex.split(str(cmd)) p = Popen(args, stdout=PIPE, stderr=PIPE) text = p.stdout.read() if not text: text = p.stderr.read() return text
• larrik 15y ago
  I don't have the exact example here, but I have a PHP function which takes a (newly deprecated) mysql result, and returns an array of rows as associative arrays with the keys lowercased. I particularly like an alternate version I wrote of that which returns an associative array keyed by a given database field instead of a regular linear array. I don't need it as much, though. (If this is still active on Monday, I'll post my real code)
• noblethrasher 15y ago
  I wrote a C#/.NET function (extension method) called `Becomes` that I use as a replacement for the various `TryParse` methods. Example: let n be an int n.Becomes("2") //returns 2 n.Becomes("sdfsd") //returns n 0.Becomes("12") returns 12 0.Becomes("sdssdf") returns 0 Non-contrived example: var person = Person.Get(0.Becomes(Request.QueryString["id"])); Basically, given the expression n.Becomes(SOME_STRING) if `SOME_STRING` can be parsed as whatever the type of `n` is then it returns the the parsed result, else it returns (the value of) `n`. More technically, `Becomes` returns a `ParseAttemptResult<T>` that is implicitly convertible to `T`. It also has `true` and `false` operators so that it can be used in an expression expecting a `Boolean` (e.g. `if` and the ternary operator`?:`). Github Repo: https://github.com/noblethrasher/Parser-Helpers/blob/master/ParserHelpers.cs https://github.com/noblethrasher/Parser-Helpers/blob/master/...
• joeyh 15y ago
  In multiple languages (perl, haskell), I find myself writing a function that runs a system command and returns False (or sometimes, throws an exception) if it failed nonzero. Also, in haskell I use these frequently to have monadic versions of some common flow control functions (some nonstandard libraries have similar functions to these but it's easier to write my own): whenM c a = c >>= flip when a unlessM c a = c >>= flip unless a (>>?) = whenM (>>!) = unlessM -- low fixity allows eg, foo bar >>! error $ "failed " ++ meep infixr 0 >>? infixr 0 >>!
  • jrockway 15y ago
    The perl core has a way of detecting non-zero exit statuses: $ perl -Mautodie=system -e 'system("/bin/false")' "/bin/false" unexpectedly returned exit value 1 at (eval 5) line 13 at -e line 1 Pretty nice.
• swah 15y ago
  Kinda ugly, but: (defun my-rename-symbol-at-point () (interactive) (let* ((curword (thing-at-point 'symbol)) (to-word nil)) (if (null curword) (message "No symbol at point!") (progn (setq to-word (read-string (concat "Replace " curword " with: "))) (save-excursion (goto-char (point-min)) (replace-regexp re-curword to-word))))))
• neilk 15y ago
  I usually write an isDefined() in JavaScript projects. Testing for typeof foo !== 'undefined' makes me want to vomit.
  • thaumaturgy 15y ago
    I did the same; I had a simple "def()" and "undef()" function pair, which shrank the code base a tiny bit and made it terribly easy to understand what conditions I was testing for. Unfortunately, I recently profiled my code and found that those functions were being called an absurd number of times during a moderately complicated page load, so they're gone now. :-(
    • neilk 15y ago
      Yeah. Although, in modern browsers, the overhead is really trivial. I just tried timing it in modern Chrome. The overhead of calling a function like isDefined(), versus typeof x !== 'undefined', seems trivial. On my machine, after 100,000 calls there's a difference of 50ms. Still, I concede that there are some situations where it would matter, if you were driving an animation. And in older browsers it might matter a lot even in other circumstances.
  • locci 15y ago
    I completely agree with you, but I would use "foo === undefined" for locals and "this/window.foo === undefined" for globals. You can also test for "== null", if you don't care for null values. Of course due to a bug in the old (v3) spec, you could redefine the builtin undefined as well as some other builtins like NaN and Infinity, but you shouldn't really be doing that and the spec at least is now fixed. In the meanwhile, to fight that, this is a commonly used pattern for browsers: (function(window,undefined) { // code // })(this);
• JesseAldridge 15y ago
  I use the following like so: from($('.foo_element'), 'text') That way if I change the html structure I don't have to to change a million jquery selectors, I can just change the from function in one place. // Access one particular element from another. function from(start, end) { start = $(start) if(start.parent().hasClass('headline') && end == 'node') return start.parent().parent() if(end == 'nodes') return start.children('.node') if(end == 'headline') return start.children('.headline') if(end.indexOf('.') != 0) end = '.' + end if(start.hasClass('headline')) return $(start.children(end)) return start.find('> .headline > ' + end) } (I'm still somewhat new to Javascript, so this may be a well-known pattern.)
  • neilk 15y ago
    Maybe I don't understand your use case, but it seems to me your function is masking some other problems. You say you're new to JS, so here's a little unsolicited advice... If you find yourself retyping the same jQuery selectors over and over, or that the structure changes a lot, then you should be encapsulating that somehow into some other function or object. Instead you're writing a do-it-all function that takes more strokes to type than the original jQuery selectors! I haven't seen the structure in question, but when I see a class called something very generic like "node", I suspect something else is wrong. If the class isn't specific and at least somewhat meaningful to a person, then you might be solving the problem at the wrong level, using classes when a rethink of the structure might be better. Also... lack of semicolons is bad style. Lack of braces for if clauses is bad style. Fix it, you'll thank me later. :)
    • JesseAldridge 15y ago
      > you should be encapsulating that somehow into some other function or object Hmm, I believe that's what I'm doing here. This pattern is nice because it's small, simple and easily applied anywhere. > when I see a class called something very generic like "node" This is for http://taskranger.com http://taskranger.com Node is a node in the tree. Might make more sense knowing that. > lack of semicolons is bad style. Lack of braces for if clauses is bad style. I'm aware of the consensus, but I'm pretty sure it's wrong :) Semicolons and unnecessary braces create noise and take up space. This subtly harms readability. I've been doing this for about a year and have had no problems. I do appreciate the suggestions, though.
• alexgartrell 15y ago
  I stole this from mongrel2, but the check macro is pretty good for error handling in C #define check(A, M, ...) \ if(!(A)) { \ fprintf(stderr, M "\n", ##__VA_ARGS__); \ goto error; \ } \ } And you use it like this FooClass *create_foo_class() { FooClass *fc = NULL; int rc; fc = malloc(sizeof(*fc)); check(fc != NULL, "allocation failed"); rc = do_something_to_foo_class(fc); check(rc == 0, "do_something_to_foo_class(...) failed"); return fc; error: if(fc != NULL) free(fc); /* Other cleanup */ return NULL; }
• mikeytown2 15y ago
  One line debugger in php. $data is the thing you wish to look at. <?php echo str_replace(' ', '&nbsp;&nbsp;&nbsp;&nbsp;', nl2br(htmlentities(iconv('utf-8', 'utf-8//IGNORE', print_r($data, TRUE)), ENT_QUOTES, 'UTF-8'))); ?>
  • chime 15y ago
    I just do echo '<pre>' and print_r. Works quite well.
    • mikeytown2 15y ago
      unless what your debugging has html in in
      • chime 15y ago
        Very true. Then I do htmlentities or just view-source (which works surprisingly well in Chrome). Usually though it's just arrays and objects for me.
• chime 15y ago
  I make lowerTrim and upperTrim functions in any language I work in - change the case and trim the string. Makes things pretty easy. // PHP example function lowerTrim($t) { return strtolower(trim($t)); } I also have matchLeft and matchRight which take two strings and return true if both strings are non-blank and the shorter matches the longer string's prefix/suffix. My most-used function during debug-phase is pR: // especially useful when dealing with PHP arrays/objects function pR($a) { echo '<pre>'; print_r($a); exit; }
• waterhouse 15y ago
  "src". Takes the name of a variable (usually a function) and searches my source directory for definitions of that variable. The way it recognizes definitions is fairly ad-hoc (it recognizes "def", "mac", "defmemo", and a few others; it doesn't attempt to recognize forms like "(let x 2 (def ...))"). arc> src.src From: /Users/waterhouse/Dropbox/arc3.1/a (mac src (name (o strict t)) `(src-fn ',name ',strict)) Found 1 results in 1 different files. "aps". Apropos; derived from the Common Lisp function. Returns all bound variable names of which the supplied argument is a substring. arc> aps.mat- (fermat-prime mat-add mat-add-mod mat-det mat-det2 mat-expt mat-id mat-mod-expt mat-mul mat-mul-mod mat-order mat-trans)
• citricsquid 15y ago
  function preint_r($var) { echo '<pre>'; print_r($var); echo '</pre>'; } true genius!
  • danoc 15y ago
    Why have I never thought of this?!
  • smoove 15y ago
    I've got the exact same function (also php) but mine is called print_arr() as in array.
    • owyn 15y ago
      Heh. Mine is called print_pre.
• pallinder 15y ago
  I guess my alerter. Very simple, but used often. https://gist.github.com/1039867 https://gist.github.com/1039867 Should emit a small sound when run, useful when running long running tasks so you dont have to pop back to the console window all the time to check if its done.
  • trbecker 15y ago
    I use a popup :) https://github.com/trbecker/getbacktowork https://github.com/trbecker/getbacktowork.
• 51Cards 15y ago
  I offer up this little item since I'm a bit of a stickler for applications using proper grammar. This is nothing complex but I use it all the time. I have versions of the same routine in every language I work in. function plural(count, itemName, pluralWord, singLead, plurLead, singFollow, plurFollow) { if (((typeof pluralWord != 'undefined') && (typeof pluralWord.valueOf() == 'string')) && (pluralWord.length > 0)) var outP = count + ' ' + ((count == 1) ? itemName : pluralWord); else var outP = count + ' ' + itemName + ((count == 1) ? '' : 's'); var follow = (count == 1) ? singFollow : plurFollow; outP += (((typeof follow != 'undefined') && (typeof follow.valueOf() == 'string')) && (follow.length > 0) ? ' ' + follow : ''); var lead = (count == 1) ? singLead : plurLead; return (((typeof lead != 'undefined') && (typeof lead.valueOf() == 'string')) && (lead.length > 0) ? lead + ' ' : '') + outP; } Usage - first simple pluralization: alert('There ' + plural(c,'dog','','is','are') + ' in my house'); c = 1 --> There is 1 dog in my house. c <> 1 --> There are 2 dogs in my house. alert(plural(c,'dog','','','','is','are') + ' in my house'); c = 1 --> 1 dog is in my house. c <> 1 --> 2 dogs are in my house. And for non-simple pluralization: alert('There ' + plural(c,'company','companies','is','are') + ' on the list'); c = 1 --> There is 1 company on the list. c <> 1 --> There are 2 companies on the list. alert(plural(c,'company','companies','','','is','are') + ' on the list'); c = 1 --> 1 company is on the list. c <> 1 --> 2 companies are on the list.
• abalashov 15y ago
  We have a SIP call accounting, rating and routing product that is driven by a SIP proxy that calls a lot of Postgres stored procedures on the backend. (The SIP proxy's configuration is written in a pseudo-programmatic, interpreted scripting language, but one lacking in many basic features and data structure primitives that can be taken for granted in the runtime of a general-purpose programming language, so most of the business layer is in the database of necessity, in addition to all the other reasons for doing it that way.) All throughout the platform, there are many points at which the ANI/caller ID and the dialed digits (the user part of the request URI) must be "translated", which is a fancy phone switch term for stripping one or more digits and then prepending one or more digits. It was such a common operation that it was genericised into our most oft-used PL/PgSQL utility function: -- Character stripping and prefix prepending transformation, which is applied -- to the ANI and DNIS at virtually all entry and exit points in the call -- processing machine. CREATE OR REPLACE FUNCTION strip_prepend_transform(_token varchar, _strip_digits integer, _prepend_prefix varchar) RETURNS varchar AS $$ DECLARE _strip_len smallint := 0; BEGIN IF _strip_digits > 0 THEN -- If the strip length given for some reason exceeds the -- actual string length, trim it down so that those digits -- that do exist are still trimmed. IF _strip_digits > LENGTH(_token) THEN _strip_len = LENGTH(_token); ELSE _strip_len = LENGTH(_token) - _strip_digits; END IF; _token := SUBSTRING(_token FROM (_strip_digits + 1) FOR _strip_len); END IF; IF LENGTH(_prepend_prefix) > 0 AND _prepend_prefix <> '' THEN _token := (_prepend_prefix || _token); END IF; RETURN _token; END $$ LANGUAGE 'plpgsql';
• btraut 15y ago
  The other <pre> and print_r()-based solutions don't work quite as well when you're writing an AJAX-based app. I use error_log for everything: // PHP error_log() wrapper function el($var, $die = true) { error_log(var_export($var, true)); if ($die) { die(); } } Also, Paul Irish's Javascript log() function is amazing. It can be found in boiler plate, but here's the gist: // Javascript console.log() wrapper window.log = function() { log.history = log.history || []; log.history.push(arguments); if (this.console) { console.log(Array.prototype.slice.call(arguments)); } };
• nxn 15y ago
  A few months ago I was writing a little application where I was doing a lot of asynchronous calls in javascript and having to track their completion to do some other stuff, it resulted in this: // Synchronizes asynchronous calls: sync(functions..., completionHandler) var sync = function() { var argLength = arguments.length - 1 , completed = 0 , callback = arguments[argLength] for (var i = 0; i < argLength; i++) { arguments[i](function() { completed++; (completed == argLength) && callback && callback(); }); } }; It pretty much takes a number of functions that perform asynchronous operations and execute a callback function upon completion of whatever the async operation is. Once they're all complete it calls the last function it received as a 'completion handler'. Example that I wrote out without bothering to test at all (treat it as pseudo-code): var pageData = null; sync ( function(cb) { $('#pageContainer').fadeOut('slow', cb); } , function(cb) { $.ajax( { url: 'page.html' , success: function(msg) { pageData = msg; cb(); } } ); } , function() { $('#pageContainer').html(pageData).fadeIn('slow'); } ); So that will start by beginning the jQuery fadeOut animation on the pageContainer html element, while immediately doing an ajax call to get another page's data. Once both operations are complete, it will take the new page data, put it into the pageContainer element, and fade it back in.
• aDemoUzer 15y ago
  JavaScript: Printing to firebug console function echo(text) { if(!window.console) { alert(text); } else { console.log(text); } } SRC: http://www.getsocialize.com/static/playground/API%20Playground/js/Harp-JS.js http://www.getsocialize.com/static/playground/API%20Playgrou... PHP: Printing arrays function A( $array) { echo "<pre>"; print_r($array); echo "</pre>"; }
• sprobertson 15y ago
  * { margin: 0; padding: 0; }
  • soundslikeneon 15y ago
    Ah, yes. The ol' stop-mucking-with-my-layout line.
  • e2daipi 15y ago
    You wrote this yourself?
• bkyan 15y ago
  // php function for getting an array of filenames for a given directory... function dirscan($directory) { $fileset = array(); if ($handle = opendir($directory)) { while (false !== ($file = readdir($handle))) { if (($file != ".") && ($file != "..")) { $fileset[] = $file; } } closedir($handle); } return $fileset; }
• Tiomaidh 15y ago
  For debugging via print statements: public int echo(int x, String name) { System.out.println(name + ":\t" + x); return x; } (I also have versions with only x as an argument, and with the other types). In use: this.setPreferredSize(new Dimension(getPreferredSize.getWidth(), echo(getViewportHeight(itemCount), "Viewport")); In addition to sparing me from System.out.println verbosity, it's really useful in situations like the above where the value you want to print isn't bound to a variable.
• trbecker 15y ago
  A function to fit a rectangular area inside another. I use it whenever I need to fit a view inside a window. Pretty handy.
• inogo 15y ago
  This is a one-line script I use every day to open a text task list, so I've ended up with a directory of well named text files documenting every day I have worked: $ vim ~/Dropbox/tasks/`date -v-${1-0}d "+%Y%m%d%a"`.txt
• awoods 15y ago
  // php function debug_object( $data, $use_var_dump = FALSE ){ echo '<pre>'; if ( $use_var_dump ){ var_dump($data); } else { print_r($data); } echo '</pre>'; }
• lkc 15y ago
  Remove parent links in Wordpress nav using jQuery: $('.sub-menu').parent().find('a:first').removeAttr('href').css('cursor','default');
• pdenya 15y ago
  Here are a few bash_profile functions I use often: #prints IPs from terminal on OS X function ip() { IP=`ifconfig -a | grep inet | grep -v inet6 | grep -v 127.0.0.1 | awk '{print $2}'` echo $IP } #instantly quits lotus notes function kill_lotus() { ps auxww | grep -i notes | grep -v grep | awk '{print $2}' | xargs kill -9 }
  • haldean 15y ago
    FWIW, your kill_lotus function is equivalent to: pgrep notes | xargs kill -9
• pdenya 15y ago
  This handles my URL vars on almost all of my projects that don't require frameworks. //sanitize and return url vars function get($fields) { if(is_array($fields)) { $info = array(); foreach($fields as $field) { if(get($field) !== false) { $info[$field] = get($field); } } return $info; } else { //Single Value $field = $fields; if(isset($_POST[$field])) { return trim(addslashes(strip_tags($_POST[$field]))); } } return false; } And this one has been with me since the first time I had to look up all these details: function json_header() { header("Expires:" . gmdate( "D, d M Y H:i:s", strtotime("+2 minutes")) . "GMT"); header("Last-Modified: " . gmdate( "D, d M Y H:i:s" ) . "GMT"); header("Cache-Control: no-cache, must-revalidate" ); header("Pragma: no-cache" ); header("Content-type: application/json"); }
• mstrelan 15y ago
  <?php function getIfSet(&$variable, $default = NULL) { if (isset($variable)) { return $variable; } return $default; } ?>