35 lines
938 B
JavaScript
35 lines
938 B
JavaScript
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"use strict";
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var typeOf = require("@sinonjs/commons").typeOf;
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var forEach = require("@sinonjs/commons").prototypes.array.forEach;
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/**
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* This helper makes it convenient to create Set instances from a
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* collection, an overcomes the shortcoming that IE11 doesn't support
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* collection arguments
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*
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* @private
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* @param {Array} array An array to create a set from
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* @returns {Set} A set (unique) containing the members from array
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*
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* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set
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*/
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function createSet(array) {
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if (arguments.length > 0 && !Array.isArray(array)) {
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throw new TypeError(
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"createSet can be called with either no arguments or an Array"
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);
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}
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var items = typeOf(array) === "array" ? array : [];
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var set = new Set();
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forEach(items, function(item) {
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set.add(item);
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});
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return set;
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}
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module.exports = createSet;
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