Small collection of useful small snippets for JavaScript and Node.js. Designed to be lightweight, independent and undisruptive as much as possible.
- is -- Check variable types
- foreach -- For each element in array or object or the element itself
- split -- Split variable into smaller chunks by regexp
- join -- Join array or object as a string with multiple seperators
- pass -- Pass vector values to a callback as arguments
Simplest way to install is to use npm, just simply npm install snippets.
MIT-style license, see INSTALL.txt.
Every feature is a property of snippets:
var foreach = require('snippets').foreach;
var split = require('snippets').split;
var pass = require('snippets').pass;
See examples/ for full examples.
var is = require('snippets').is;
var a = [1,2,3,4,5];
if(is.array(a)) console.log("a is array");
else if(is.object(a)) console.log("a is object");
else console.log("a is not array nor object");
Write each array element to console:
var a = [1,2,3,4,5];
foreach(a).each(function(v) { console.log(v); });
Write each object key=value pair to console:
a = {'foo':1,'bar':2};
foreach(a).each(function(v, k) { console.log(k+"="+v); });
Write single value to console:
a = 'foobar';
foreach(a).each(function(v) { console.log(v); });
Splits string into smaller chunks using regexp:
var vector = split(/: */, "One: Two: Three: End", 2);
Resulting vector will be:
["One", "Two: Three: End"]
Please note: Standard JavaScript split does NOT append the rest of the string in the last element.
Joins an array into a string with multiple separators:
var str = join(["a","b","c"], [":","."]);
Resulting str will be "a:b.c".
Default separator is ",".
To change the default, use:
var str = join(["a","b","c"], [":"], ".");
Passes the values from array into the callback as arguments:
pass(["a", "b"]).on(function(key, value) { console.log(key+"="+value); });
To parse a key-value line, we can use pass with split:
pass(split(/ *= */, "a = b", 2)).on(function(key,value) { console.log(key+"="+value); });
To remove white spaces:
a = ltrim(' Hello World '); // a = 'Hello World '
a = rtrim(' Hello World '); // a = ' Hello World'
a = trim(' Hello World '); // a = 'Hello World'
Pad string to specific length from left:
a = lpad('123', 5, '#'); // a = '##123';
a = rpad('123', 5, '#'); // a = '123##';