angular2
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Angular 2 - a web framework for modern web apps
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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 lang_1 = require('angular2/src/facade/lang');
var exceptions_1 = require('angular2/src/facade/exceptions');
var collection_1 = require('angular2/src/facade/collection');
var core_1 = require('angular2/core');
var invalid_pipe_argument_exception_1 = require('./invalid_pipe_argument_exception');
/**
* Creates a new List or String containing only a subset (slice) of the
* elements.
*
* The starting index of the subset to return is specified by the `start` parameter.
*
* The ending index of the subset to return is specified by the optional `end` parameter.
*
* ### Usage
*
* expression | slice:start[:end]
*
* All behavior is based on the expected behavior of the JavaScript API
* Array.prototype.slice() and String.prototype.slice()
*
* Where the input expression is a [List] or [String], and `start` is:
*
* - **a positive integer**: return the item at _start_ index and all items after
* in the list or string expression.
* - **a negative integer**: return the item at _start_ index from the end and all items after
* in the list or string expression.
* - **`|start|` greater than the size of the expression**: return an empty list or string.
* - **`|start|` negative greater than the size of the expression**: return entire list or
* string expression.
*
* and where `end` is:
*
* - **omitted**: return all items until the end of the input
* - **a positive integer**: return all items before _end_ index of the list or string
* expression.
* - **a negative integer**: return all items before _end_ index from the end of the list
* or string expression.
*
* When operating on a [List], the returned list is always a copy even when all
* the elements are being returned.
*
* ## List Example
*
* This `ngFor` example:
*
* {@example core/pipes/ts/slice_pipe/slice_pipe_example.ts region='SlicePipe_list'}
*
* produces the following:
*
* <li>b</li>
* <li>c</li>
*
* ## String Examples
*
* {@example core/pipes/ts/slice_pipe/slice_pipe_example.ts region='SlicePipe_string'}
*/
var SlicePipe = (function () {
function SlicePipe() {
}
SlicePipe.prototype.transform = function (value, args) {
if (args === void 0) { args = null; }
if (lang_1.isBlank(args) || args.length == 0) {
throw new exceptions_1.BaseException('Slice pipe requires one argument');
}
if (!this.supports(value)) {
throw new invalid_pipe_argument_exception_1.InvalidPipeArgumentException(SlicePipe, value);
}
if (lang_1.isBlank(value))
return value;
var start = args[0];
var end = args.length > 1 ? args[1] : null;
if (lang_1.isString(value)) {
return lang_1.StringWrapper.slice(value, start, end);
}
return collection_1.ListWrapper.slice(value, start, end);
};
SlicePipe.prototype.supports = function (obj) { return lang_1.isString(obj) || lang_1.isArray(obj); };
SlicePipe = __decorate([
core_1.Pipe({ name: 'slice', pure: false }),
core_1.Injectable(),
__metadata('design:paramtypes', [])
], SlicePipe);
return SlicePipe;
})();
exports.SlicePipe = SlicePipe;
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