jsdoc/node_modules/underscore.string/lib/underscore.string.js
2011-05-07 15:16:47 +01:00

303 lines
9.9 KiB
JavaScript

// Underscore.string
// (c) 2010 Esa-Matti Suuronen <esa-matti aet suuronen dot org>
// Underscore.strings is freely distributable under the terms of the MIT license.
// Documentation: https://github.com/edtsech/underscore.string
// Some code is borrowed from MooTools and Alexandru Marasteanu.
// Version 1.1.4
(function(){
// ------------------------- Baseline setup ---------------------------------
// Establish the root object, "window" in the browser, or "global" on the server.
var root = this;
var nativeTrim = String.prototype.trim;
function str_repeat(i, m) {
for (var o = []; m > 0; o[--m] = i);
return o.join('');
}
function defaultToWhiteSpace(characters){
if (characters) {
return _s.escapeRegExp(characters);
}
return '\\s';
}
var _s = {
isBlank: function(str){
return !!str.match(/^\s*$/);
},
capitalize : function(str) {
return str.charAt(0).toUpperCase() + str.substring(1).toLowerCase();
},
chop: function(str, step){
step = step || str.length;
var arr = [];
for (var i = 0; i < str.length;) {
arr.push(str.slice(i,i + step));
i = i + step;
}
return arr;
},
clean: function(str){
return _s.strip(str.replace(/\s+/g, ' '));
},
count: function(str, substr){
var count = 0, index;
for (var i=0; i < str.length;) {
index = str.indexOf(substr, i);
index >= 0 && count++;
i = i + (index >= 0 ? index : 0) + substr.length;
}
return count;
},
chars: function(str) {
return str.split('');
},
escapeHTML: function(str) {
return String(str||'').replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
},
unescapeHTML: function(str) {
return String(str||'').replace(/&amp;/g, '&').replace(/&lt;/g, '<').replace(/&gt;/g, '>');
},
escapeRegExp: function(str){
// From MooTools core 1.2.4
return String(str||'').replace(/([-.*+?^${}()|[\]\/\\])/g, '\\$1');
},
insert: function(str, i, substr){
var arr = str.split('');
arr.splice(i, 0, substr);
return arr.join('');
},
includes: function(str, needle){
return str.indexOf(needle) !== -1;
},
join: function(sep) {
// TODO: Could this be faster by converting
// arguments to Array and using array.join(sep)?
sep = String(sep);
var str = "";
for (var i=1; i < arguments.length; i += 1) {
str += String(arguments[i]);
if ( i !== arguments.length-1 ) {
str += sep;
}
}
return str;
},
lines: function(str) {
return str.split("\n");
},
// reverse: function(str){
// return Array.prototype.reverse.apply(str.split('')).join('');
// },
splice: function(str, i, howmany, substr){
var arr = str.split('');
arr.splice(i, howmany, substr);
return arr.join('');
},
startsWith: function(str, starts){
return str.length >= starts.length && str.substring(0, starts.length) === starts;
},
endsWith: function(str, ends){
return str.length >= ends.length && str.substring(str.length - ends.length) === ends;
},
succ: function(str){
var arr = str.split('');
arr.splice(str.length-1, 1, String.fromCharCode(str.charCodeAt(str.length-1) + 1));
return arr.join('');
},
titleize: function(str){
var arr = str.split(' '),
word;
for (var i=0; i < arr.length; i++) {
word = arr[i].split('');
if(typeof word[0] !== 'undefined') word[0] = word[0].toUpperCase();
i+1 === arr.length ? arr[i] = word.join('') : arr[i] = word.join('') + ' ';
}
return arr.join('');
},
camelize: function(str){
return _s.trim(str).replace(/(\-|_|\s)+(.)?/g, function(match, separator, chr) {
return chr ? chr.toUpperCase() : '';
});
},
underscored: function(str){
return _s.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1_$2').replace(/\-|\s+/g, '_').toLowerCase();
},
dasherize: function(str){
return _s.trim(str).replace(/([a-z\d])([A-Z]+)/g, '$1-$2').replace(/^([A-Z]+)/, '-$1').replace(/\_|\s+/g, '-').toLowerCase();
},
trim: function(str, characters){
if (!characters && nativeTrim) {
return nativeTrim.call(str);
}
characters = defaultToWhiteSpace(characters);
return str.replace(new RegExp('\^[' + characters + ']+|[' + characters + ']+$', 'g'), '');
},
ltrim: function(str, characters){
characters = defaultToWhiteSpace(characters);
return str.replace(new RegExp('\^[' + characters + ']+', 'g'), '');
},
rtrim: function(str, characters){
characters = defaultToWhiteSpace(characters);
return str.replace(new RegExp('[' + characters + ']+$', 'g'), '');
},
truncate: function(str, length, truncateStr){
truncateStr = truncateStr || '...';
return str.slice(0,length) + truncateStr;
},
words: function(str, delimiter) {
delimiter = delimiter || " ";
return str.split(delimiter);
},
pad: function(str, length, padStr, type) {
var padding = '';
var padlen = 0;
if (!padStr) { padStr = ' '; }
else if (padStr.length > 1) { padStr = padStr[0]; }
switch(type) {
case "right":
padlen = (length - str.length);
padding = str_repeat(padStr, padlen);
str = str+padding;
break;
case "both":
padlen = (length - str.length);
padding = {
'left' : str_repeat(padStr, Math.ceil(padlen/2)),
'right': str_repeat(padStr, Math.floor(padlen/2))
};
str = padding.left+str+padding.right;
break;
default: // "left"
padlen = (length - str.length);
padding = str_repeat(padStr, padlen);;
str = padding+str;
}
return str;
},
lpad: function(str, length, padStr) {
return _s.pad(str, length, padStr);
},
rpad: function(str, length, padStr) {
return _s.pad(str, length, padStr, 'right');
},
lrpad: function(str, length, padStr) {
return _s.pad(str, length, padStr, 'both');
},
/**
* Credits for this function goes to
* http://www.diveintojavascript.com/projects/sprintf-for-javascript
*
* Copyright (c) Alexandru Marasteanu <alexaholic [at) gmail (dot] com>
* All rights reserved.
* */
sprintf: function(){
var i = 0, a, f = arguments[i++], o = [], m, p, c, x, s = '';
while (f) {
if (m = /^[^\x25]+/.exec(f)) {
o.push(m[0]);
}
else if (m = /^\x25{2}/.exec(f)) {
o.push('%');
}
else if (m = /^\x25(?:(\d+)\$)?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-fosuxX])/.exec(f)) {
if (((a = arguments[m[1] || i++]) == null) || (a == undefined)) {
throw('Too few arguments.');
}
if (/[^s]/.test(m[7]) && (typeof(a) != 'number')) {
throw('Expecting number but found ' + typeof(a));
}
switch (m[7]) {
case 'b': a = a.toString(2); break;
case 'c': a = String.fromCharCode(a); break;
case 'd': a = parseInt(a); break;
case 'e': a = m[6] ? a.toExponential(m[6]) : a.toExponential(); break;
case 'f': a = m[6] ? parseFloat(a).toFixed(m[6]) : parseFloat(a); break;
case 'o': a = a.toString(8); break;
case 's': a = ((a = String(a)) && m[6] ? a.substring(0, m[6]) : a); break;
case 'u': a = Math.abs(a); break;
case 'x': a = a.toString(16); break;
case 'X': a = a.toString(16).toUpperCase(); break;
}
a = (/[def]/.test(m[7]) && m[2] && a >= 0 ? '+'+ a : a);
c = m[3] ? m[3] == '0' ? '0' : m[3].charAt(1) : ' ';
x = m[5] - String(a).length - s.length;
p = m[5] ? str_repeat(c, x) : '';
o.push(s + (m[4] ? a + p : p + a));
}
else {
throw('Huh ?!');
}
f = f.substring(m[0].length);
}
return o.join('');
}
}
// Aliases
_s.strip = _s.trim;
_s.lstrip = _s.ltrim;
_s.rstrip = _s.rtrim;
_s.center = _s.lrpad
_s.ljust = _s.lpad
_s.rjust = _s.rpad
// CommonJS module is defined
if (typeof window === 'undefined' && typeof module !== 'undefined') {
// Export module
module.exports = _s;
// Integrate with Underscore.js
} else if (typeof root._ !== 'undefined') {
root._.mixin(_s);
// Or define it
} else {
root._ = _s;
}
}());