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OpenBoard/resources/library/interactivities/Syllables.wgt/scripts/ext.js

47 lines
888 B

13 years ago
// http://javascript.about.com/library/blshuffle.htm
Array.prototype.shuffle = function()
{
var s = [];
while (this.length) s.push(this.splice(Math.random() * this.length, 1));
while (s.length) this.push(s.pop());
return this;
};
Array.prototype.indexOf = function( element )
{
for( var i in this )
{
if( this[i] == element )
return i;
}
return -1;
};
String.prototype.copy = function()
{
return this.substring( 0, this.length );
};
String.prototype.trim = function( ext )
{
var chars = [
" ", "\t", "\n", "\r"
];
var s = this.copy();
if( arguments.length > 0 ){
for( var i in ext ){
chars.push( ext[i] );
}
}
while( chars.indexOf( s.charAt( 0 ) ) != -1 ){
s = s.substring( 1, s.length );
}
while( chars.indexOf( s.charAt( s.length-1 ) ) != -1 ){
s = s.substring( 0, s.length-1 );
}
return s;
};