Streams2 line reader
Streams2 line reader / stream transformer.
First let me say: I did NOT want to write yet another line reader!
I couldn't find one that is working with node's new
So here we are...
var fs = require'fs';var eachline = require'eachline';var stream = fscreateReadStream__dirname+'/.gitignore';eachlinestreamconsole.logline;;
However, if you're just looking to open a file:
var eachline = require'eachline';eachlinein__dirname+'/.gitignore'console.logline;;
...or if you need a simple http GET:
var eachline = require'eachline';var url = '';eachlineinurlconsole.logline;;
var fs = require'fs';var eachline = require'eachline';var file = fscreateReadStream__dirname+'/.gitignore';var transformer = eachlinereturn datasubstr0 2+'\n';;filepipetransformerpipeprocessstdout;
Use with a
pipe() to re-chunk the stream into lines.
pipe() optionally specifying the encoding.
Got that stream ready? Pass it in, get them lines. Easy-peasy.
eachline.in(filepath, callback) Just a helper function to make these simple tasks cleaner.
It returns the
Transform stream so you can listen to the events.
var linecount = 0;var eachline = require'eachline';eachlinein__dirname+'/.gitignore'linecount++;on'finish'console.loglinecount + " lines found";;
callback arguments above will be called for every line found in the
It will be passed the
lineno arguments. You can optionally defined a
3rd argument to get asynchronous flow.
callback.length to detirmine
if asynchronous flow should be used. If found, you must call
next() to continue reading.
For Stream transformations, any value
return'd will be written to the next
pipe() in the chain.
Inside the callback function,
this refers to the transformer. For convenience of
detecting the final line of the stream, there is a
var fs = require"fs";var eachline = require"eachline";fscreateReadStream'./.gitignore'pipeeachline//only write the last line if it is not emptyif!thisfinished || lineconsole.logi line;;
The MIT License (MIT)
Copyright (c) 2013 William Kapke
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.