1 if (!Int32Array.__proto__.from) { 2 Object.defineProperty(Int32Array.__proto__, 'from', { 3 value: function(obj) { 4 obj = Object(obj); 5 if (!obj['length']) { 6 return new this(0); 7 } 8 var typed_array = new this(obj.length); 9 for(var i = 0; i < typed_array.length; i++) { 10 typed_array[i] = obj[i]; 11 } 12 return typed_array; 13 } 14 }); 15 } 16 17 if (!Array.prototype.copyWithin) { 18 Array.prototype.copyWithin = function(target, start, end) { 19 var O = Object(this); 20 var len = O.length >>> 0; 21 var to = target | 0; 22 var from = start | 0; 23 var count = Math.min(Math.min(end | 0, len) - from, len - to); 24 var direction = 1; 25 if (from < to && to < (from + count)) { 26 direction = -1; 27 from += count - 1; 28 to += count - 1; 29 } 30 while (count > 0) { 31 O[to] = O[from]; 32 from += direction; 33 to += direction; 34 count--; 35 } 36 return O; 37 }; 38 } 39 40 if (!Array.prototype.fill) { 41 Object.defineProperty(Array.prototype, 'fill', { 42 value: function(value, start, end) { 43 end = end | 0; 44 var O = Object(this); 45 var k = start | 0; 46 while (k < end) { 47 O[k] = value; 48 k++; 49 } 50 return O; 51 } 52 }); 53 } 54 55 if (!Int8Array.prototype.copyWithin) { 56 Int8Array.prototype.copyWithin = Array.prototype.copyWithin; 57 } 58 59 if (!Int8Array.prototype.fill) { 60 Int8Array.prototype.fill = Array.prototype.fill; 61 } 62 63 if (!Int32Array.prototype.fill) { 64 Int32Array.prototype.fill = Array.prototype.fill; 65 } 66
