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