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synced 2026-11-09 15:11:11 -05:00
Rich Trott
d7aa8fa088
Update ESLint to 2.1.0. ESLint has a number of potentially-useful new features but this change attempts to be minimal in its changes. However, some things could not be avoided reasonably. ESLint 2.1.0 found a few lint issues that ESLing 1.x missed with template strings that did not take advantage of any features of template strings, and `let` declarations where `const` sufficed. Additionally, ESLint 2.1.0 removes some granularity around enabling ES6 features. Some features (e.g., spread operator) that had been turned off in our configuration for ESLint 1.x are now permitted. PR-URL: https://github.com/nodejs/node/pull/5214 Reviewed-By: Michaël Zasso <mic.besace@gmail.com> Reviewed-By: jbergstroem - Johan Bergström <bugs@bergstroem.nu> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Roman Reiss <me@silverwind.io> Reviewed-By: Myles Borins <myles.borins@gmail.com>
61 lines
2.0 KiB
JavaScript
61 lines
2.0 KiB
JavaScript
var arrayEach = require('./_arrayEach'),
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baseCreate = require('./_baseCreate'),
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baseForOwn = require('./_baseForOwn'),
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baseIteratee = require('./_baseIteratee'),
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isArray = require('./isArray'),
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isFunction = require('./isFunction'),
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isObject = require('./isObject'),
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isTypedArray = require('./isTypedArray');
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/**
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* An alternative to `_.reduce`; this method transforms `object` to a new
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* `accumulator` object which is the result of running each of its own enumerable
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* properties through `iteratee`, with each invocation potentially mutating
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* the `accumulator` object. The iteratee is invoked with four arguments:
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* (accumulator, value, key, object). Iteratee functions may exit iteration
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* early by explicitly returning `false`.
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*
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* @static
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* @memberOf _
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* @category Object
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* @param {Array|Object} object The object to iterate over.
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* @param {Function} [iteratee=_.identity] The function invoked per iteration.
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* @param {*} [accumulator] The custom accumulator value.
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* @returns {*} Returns the accumulated value.
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* @example
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*
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* _.transform([2, 3, 4], function(result, n) {
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* result.push(n *= n);
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* return n % 2 == 0;
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* }, []);
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* // => [4, 9]
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*
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* _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
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* (result[value] || (result[value] = [])).push(key);
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* }, {});
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* // => { '1': ['a', 'c'], '2': ['b'] }
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*/
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function transform(object, iteratee, accumulator) {
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var isArr = isArray(object) || isTypedArray(object);
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iteratee = baseIteratee(iteratee, 4);
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if (accumulator == null) {
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if (isArr || isObject(object)) {
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var Ctor = object.constructor;
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if (isArr) {
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accumulator = isArray(object) ? new Ctor : [];
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} else {
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accumulator = baseCreate(isFunction(Ctor) ? Ctor.prototype : undefined);
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}
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} else {
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accumulator = {};
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}
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}
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(isArr ? arrayEach : baseForOwn)(object, function(value, index, object) {
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return iteratee(accumulator, value, index, object);
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});
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return accumulator;
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}
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module.exports = transform;
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