You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
2.8 KiB
70 lines
2.8 KiB
'use strict'; |
|
var $ = require('../internals/export'); |
|
var toAbsoluteIndex = require('../internals/to-absolute-index'); |
|
var toInteger = require('../internals/to-integer'); |
|
var toLength = require('../internals/to-length'); |
|
var toObject = require('../internals/to-object'); |
|
var arraySpeciesCreate = require('../internals/array-species-create'); |
|
var createProperty = require('../internals/create-property'); |
|
var arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support'); |
|
var arrayMethodUsesToLength = require('../internals/array-method-uses-to-length'); |
|
|
|
var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('splice'); |
|
var USES_TO_LENGTH = arrayMethodUsesToLength('splice', { ACCESSORS: true, 0: 0, 1: 2 }); |
|
|
|
var max = Math.max; |
|
var min = Math.min; |
|
var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF; |
|
var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded'; |
|
|
|
// `Array.prototype.splice` method |
|
// https://tc39.github.io/ecma262/#sec-array.prototype.splice |
|
// with adding support of @@species |
|
$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH }, { |
|
splice: function splice(start, deleteCount /* , ...items */) { |
|
var O = toObject(this); |
|
var len = toLength(O.length); |
|
var actualStart = toAbsoluteIndex(start, len); |
|
var argumentsLength = arguments.length; |
|
var insertCount, actualDeleteCount, A, k, from, to; |
|
if (argumentsLength === 0) { |
|
insertCount = actualDeleteCount = 0; |
|
} else if (argumentsLength === 1) { |
|
insertCount = 0; |
|
actualDeleteCount = len - actualStart; |
|
} else { |
|
insertCount = argumentsLength - 2; |
|
actualDeleteCount = min(max(toInteger(deleteCount), 0), len - actualStart); |
|
} |
|
if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER) { |
|
throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED); |
|
} |
|
A = arraySpeciesCreate(O, actualDeleteCount); |
|
for (k = 0; k < actualDeleteCount; k++) { |
|
from = actualStart + k; |
|
if (from in O) createProperty(A, k, O[from]); |
|
} |
|
A.length = actualDeleteCount; |
|
if (insertCount < actualDeleteCount) { |
|
for (k = actualStart; k < len - actualDeleteCount; k++) { |
|
from = k + actualDeleteCount; |
|
to = k + insertCount; |
|
if (from in O) O[to] = O[from]; |
|
else delete O[to]; |
|
} |
|
for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1]; |
|
} else if (insertCount > actualDeleteCount) { |
|
for (k = len - actualDeleteCount; k > actualStart; k--) { |
|
from = k + actualDeleteCount - 1; |
|
to = k + insertCount - 1; |
|
if (from in O) O[to] = O[from]; |
|
else delete O[to]; |
|
} |
|
} |
|
for (k = 0; k < insertCount; k++) { |
|
O[k + actualStart] = arguments[k + 2]; |
|
} |
|
O.length = len - actualDeleteCount + insertCount; |
|
return A; |
|
} |
|
});
|
|
|