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var array = [1, 2, 3, 4, 5]; var i = array.indexOf(3); document.write(i + "<br />"); if (i > -1) { array.splice(i, 1); } document.write(array); /* run: 2 1,2,4,5 */
var array = [1, 7, 8, 9]; value = 7 array = array.filter(function(item) { return item !== value }) document.write(array); /* run: 1,8,9 */