value : iteratee(value)//如果有iteratee参数,就把array数组的循环当前值value传入iteratee,返回值存为computedvalue= (comparator || value !== 0) ? value : 0if(isCommon && computed ===computed) {//排除array当前循环值是否是NaN的情况,isCommon用来标记是否要使用特殊的比较方式let valuesIndex = values...
* @returns {*} Returns the accumulated value.*///对于数组类型实现的reduce方法functionarrayReduce(array, iteratee, accumulator, initAccum) {varindex = -1,//循环索引length = array ? array.length : 0;//数组长度if(initAccum && length) {//第一次的累加值是数组第一个元素accumulator = array[++...
Made LARGE_ARRAY_SIZE check in stackSet align with othersOptimized adding values to stacks by not inspecting all key-value pairsOptimized “isType” methods to use faster Node.js C++ helpers when availableOptimized _.endsWith, _.negate, & _.startsWith ...
array, [values]) Arguments Returns Example _.xor([arrays]) Arguments Returns Example _.zip([arrays]) Arguments Returns Example _.zipObject(props, [values=[]]) Arguments Returns Example “Chain” Methods ._(value) Arguments Returns Example _.chain(value) Arguments Returns Example _.tap(value,...
This is useful for example in situations where you might have a checkbox that you want to represent membership of a value in a set instead of an implicit toggle. Used by includeLens.toggleElement(any, array) -> array Removes an element from an array if it's included in the array, or ...
Gets the first element or first n elements of an array. If a callback is provided elements at the beginning of the array are returned as long as the callback returns truey. The callback is bound to thisArg and invoked with three arguments; (value, index, array). If a property name ...
If a number n is passed, the first n elements of the array are returned. If a callback function is passed, elements at the beginning of the array are returned as long as the callback returns truthy. The callback is bound to thisArg and invoked with three arguments; (value, index, ...
› find the path of the first matching deep value 📚 see docs example a bit later let children = [/* expand to see */]; // next time // sorry Console: ️ Try it yourself (no yet) ››› mapDeep › get array of values processed by iteratee. 📚 see docs ...
Check if posts exists. db.has('posts') .value() Set posts. db.set('posts', []) .write() Sort the top five posts. db.get('posts') .filter({published: true}) .sortBy('views') .take(5) .value() Get post titles. db.get('posts') .map('title') .value() Get the number ...
Check if posts exists. db.has('posts').value() Set posts. db.set('posts',[]).write() Sort the top five posts. db.get('posts').filter({published:true}).sortBy('views').take(5).value() Get post titles. db.get('posts').map('title').value() ...