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[node -e] evaluates a line of node.js source from a command line argument: $ node -e "console.log('Hello, world.')" Hello, world. [xargs] allows you
by dpritchett 14y ago
[node -e] evaluates a line of node.js source from a command line argument:
$ node -e "console.log('Hello, world.')"
Hello, world.
[xargs] allows you to pipe the output of one command as an argument to another command. By default it will show up at the tail end of the second command's arg list, but if you want to interleave it you can use -I flag:
$ echo /usr/share/dict/words | xargs head -5
A
A's
AOL
AOL's
$ echo petard | xargs -I {} grep {} /usr/share/dict/words
petard
petard's
petards
[xargs node -e] therefore allows text from STDIN to inserted into a script to be evaluated by the node interpreter, accessible via process.argv:
$ echo is dog this yes | xargs node -e "console.log(process.argv.slice(1).sort().reverse().join(' ').toUpperCase())"
YES THIS IS DOG
- uselessuseof 14y agohead -5 /usr/share/dict/words same result as with xargs grep petard /usr/share/dict/words same result as with xargs not sure what you are trying to demonstrate here useless use of xargs?
- spal 14y agoNo, he is trying to demonstrate how to use 'xargs node -e'. Are you even reading this discussion properly or are you just searching for some shell snippets and ridicule them as soon as you get a chance? This is what it looks like from your history: http://news.ycombinator.com/threads?id=uselessuseof http://news.ycombinator.com/threads?id=uselessuseof ionwake doesn't want to learn how to search a word. He wants to know how 'xargs node -e' works. Please read this again: http://news.ycombinator.com/item?id=4075293 http://news.ycombinator.com/item?id=4075293