P.S. I know that was a bad example since that does not require a lazy
assignment, it could be performed runtime
inArray: Array.prototype.indexOf ?
function( elem, array ) {
return array.indexOf(elem);
} :
function( elem, array ) {
for ( var i = 0, length = array.length; i < length; i++ ) {
if ( array[ i ] === elem )
return i;
};
return -1;
}
,
It was just an example how features detection could improve performances
(and with native indexOf we know that performances are better)
Regards
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