Is there a way to eliminate the object in this array where b equals 2?
var arr = [{a: 1, b: 2}, {a: 3, b: 4}, {a: 5, b: 6}, {a: 7, b: 8}];
Is there a way to eliminate the object in this array where b equals 2?
var arr = [{a: 1, b: 2}, {a: 3, b: 4}, {a: 5, b: 6}, {a: 7, b: 8}];
arr = arr.filter(function( value ) {
return value.b !== 2;
});
Please note that this code is only compatible with Internet Explorer version 9 and above.
One efficient approach to achieve this task could involve utilizing a for loop. Please feel free to offer corrections if needed...
var items = [{x: 10, y: 20}, {x: 30, y: 40}, {x: 50, y: 60}, {x: 70, y: 80}];
for(var j=0; j<items.length; j++) {
if(items[j].y == 20) { items.splice(j, 1); }
}
Based on performance testing conducted on jsperf, it was found that the quickest method for removing an element from an array is by utilizing delete array[index]. Reference: http://jsperf.com/object-delete-vs-array-splice-vs-array-delete
An alternative approach can be examined here: http://jsfiddle.net/no20bv5o/3/
However, due to the additional steps involved in the for loop and secondary array usage, this method is not as efficient as the previously mentioned arr.filter() function, as demonstrated in the following jsperf test: http://jsperf.com/filter-array-by-element-attribute
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