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32 lines
931 B
32 lines
931 B
4 years ago
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var map_1 = require("./map");
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function pluck() {
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var properties = [];
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for (var _i = 0; _i < arguments.length; _i++) {
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properties[_i] = arguments[_i];
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}
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var length = properties.length;
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if (length === 0) {
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throw new Error('list of properties cannot be empty.');
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}
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return function (source) { return map_1.map(plucker(properties, length))(source); };
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}
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exports.pluck = pluck;
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function plucker(props, length) {
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var mapper = function (x) {
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var currentProp = x;
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for (var i = 0; i < length; i++) {
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var p = currentProp[props[i]];
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if (typeof p !== 'undefined') {
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currentProp = p;
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}
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else {
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return undefined;
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}
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}
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return currentProp;
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};
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return mapper;
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}
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//# sourceMappingURL=pluck.js.map
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