37 lines
959 B
JavaScript
37 lines
959 B
JavaScript
if (!Array.prototype.flat) {
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// eslint-disable-next-line no-extend-native
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Object.defineProperty(Array.prototype, 'flat', {
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configurable: true,
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value: function flat() {
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var depth = isNaN(arguments[0]) ? 1 : Number(arguments[0])
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return depth
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? Array.prototype.reduce.call(
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this,
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function(acc, cur) {
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if (Array.isArray(cur)) {
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acc.push.apply(acc, flat.call(cur, depth - 1))
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} else {
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acc.push(cur)
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}
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return acc
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},
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[]
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)
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: Array.prototype.slice.call(this)
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},
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writable: true,
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})
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}
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if (!Array.prototype.flatMap) {
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// eslint-disable-next-line no-extend-native
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Object.defineProperty(Array.prototype, 'flatMap', {
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configurable: true,
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value: function flatMap() {
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return Array.prototype.map.apply(this, arguments).flat()
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},
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writable: true,
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})
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}
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