ng2-pipes
Version:
Useful angular2 pipes
45 lines (43 loc) • 1.89 kB
JavaScript
;
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var core_1 = require('@angular/core');
var helpers_1 = require('../helpers/helpers');
var GroupByPipe = (function () {
function GroupByPipe() {
}
GroupByPipe.prototype.transform = function (arr) {
var args = [];
for (var _i = 1; _i < arguments.length; _i++) {
args[_i - 1] = arguments[_i];
}
if (!Array.isArray(arr)) {
return arr;
}
return this.groupBy(arr, args[0]);
};
GroupByPipe.prototype.groupBy = function (list, discriminator) {
return list.reduce(function (acc, payload) {
var key = helpers_1.default.isFunction(discriminator)
? discriminator(payload)
: payload[discriminator];
return acc[key] = Array.isArray(acc[key])
? acc[key].concat([payload])
: [payload], acc;
}, {});
};
GroupByPipe = __decorate([
core_1.Pipe({ name: 'groupBy' }),
__metadata('design:paramtypes', [])
], GroupByPipe);
return GroupByPipe;
}());
exports.GroupByPipe = GroupByPipe;
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