On 27 mai, 12:22, Jay Tee <[EMAIL PROTECTED]> wrote:
> On May 26, 8:29 pm, kangax <[EMAIL PROTECTED]> wrote:
>
>
>
> > On May 26, 12:56 pm, Jay Tee <[EMAIL PROTECTED]> wrote:
>
> > > function array_fill(len,val) {
> > > return (function() {
> > > var retarray = [];
> > > $R(0,len,true).each(function(elem) {
> > > retarray[elem] = val;
> > > });
> > > return retarray;
> > > }());
>
> > > }
>
Or perhaps this function may help you, it includes more use cases and
allows array resizing without using push(). Test case included (the
element 'debug' is a DIV) :
function testDebug(a, t, c) {
$('debug').insert( '<code>[' + a.toString() + '] ' + t + '...
' + (c ? 'Pass' : 'Failed') + '</code><br />' );
}
/**
* array.fill(value)
* array.fill(value, length)
* array.fill(value, start, length)
*
* NOTE : start and length are not range checked
*/
Array.prototype.fill = function(value,start,length) {
if (isNaN(length)) {
length = start || this.length;
start = 0;
}
var n=start || 0;
var len=(n+length);
if (len>=this.length) this.concat(new Array(len-this.length));
while (n<len) {this[n++]=value;}
return this;
};
var arr1;
arr1 = new Array();
$('debug').insert('<p>new Array();</p>');
testDebug(arr1, 'length = 0', arr1.length == 0 );
testDebug(arr1, 'toString() = ""', arr1.toString() == '' );
arr1 = new Array().fill(0);
$('debug').insert('<p>new Array().fill(0);</p>');
testDebug(arr1, 'length = 0', arr1.length == 0 );
testDebug(arr1, 'toString() = ""', arr1.toString() == '' );
arr1 = new Array(3);
$('debug').insert('<p>new Array(3);</p>');
testDebug(arr1, 'length = 3', arr1.length == 3 );
testDebug(arr1, 'toString() = ",,"', arr1.toString() == ',,' );
arr1 = new Array().fill(0, 3);
$('debug').insert('<p>new Array().fill(0, 3);</p>');
testDebug(arr1, 'length = 3', arr1.length == 3 );
testDebug(arr1, 'toString() = "0,0,0"', arr1.toString() ==
'0,0,0' );
arr1.fill(1, 4);
$('debug').insert('<p>fill(1, 4);</p>');
testDebug(arr1, 'length = 4', arr1.length == 4 );
testDebug(arr1, 'toString() = "1,1,1,1"', arr1.toString() ==
'1,1,1,1' );
arr1.fill(2, 2, 2);
$('debug').insert('<p>fill(2, 2, 2);</p>');
testDebug(arr1, 'length = 4', arr1.length == 4 );
testDebug(arr1, 'toString() = "1,1,2,2"', arr1.toString() ==
'1,1,2,2' );
arr1.fill(3, 5, 2);
$('debug').insert('<p>fill(3, 5, 2);</p>');
testDebug(arr1, 'length = 7', arr1.length == 7 );
testDebug(arr1, 'toString() = "1,1,2,2,,3,3"', arr1.toString()
== '1,1,2,2,,3,3' );
arr1.fill(4, 1, 3);
$('debug').insert('<p>fill(4, 1, 3);</p>');
testDebug(arr1, 'length = 7', arr1.length == 7 );
testDebug(arr1, 'toString() = "1,4,4,4,,3,3"', arr1.toString()
== '1,4,4,4,,3,3' );
Hope this helps. (And if the core folks think this is core worthy, I
think it could make a pretty addon.)
yanick
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