Open youngwind opened 8 years ago
chain
1.1 _.chunk(array, [size=1])平均分配数组到一个新的数组中
console.log(_.chunk(['a', 'b', 'c', 'd', 'e'], 1)); console.log(_.chunk(['a', 'b', 'c', 'd', 'e'], 2)); console.log(_.chunk(['a', 'b', 'c', 'd', 'e'], 3)); console.log(_.chunk(['a', 'b', 'c', 'd', 'e'], 4)); ============================ [ [ 'a' ], [ 'b' ], [ 'c' ], [ 'd' ], [ 'e' ] ] [ [ 'a', 'b' ], [ 'c', 'd' ], [ 'e' ] ] [ [ 'a', 'b', 'c' ], [ 'd', 'e' ] ] [ [ 'a', 'b', 'c', 'd' ], [ 'e' ] ]
1.2 _.compact(array) 数组去除null、0、false、“”、undefined、NaN项
console.log(_.compact([0,1,'',2,NaN,false,undefined,null,'3'])) ================================= [ 1, 2, '3' ]
1.3. _.difference(array,[values]) 差异对比,返回array中不存在[values]中的值
console.log(_.difference([1,2,3,4,5,6],[4,2])); console.log(_.difference([1,2,3,4,5,6],[4,6,7])); console.log(_.difference([1,2,3,4,5,6],[1,2,3])); ============================================= [ 1, 3, 5, 6 ] [ 1, 2, 3, 5 ] [ 4, 5, 6 ]
1.4. _.drop(array,[n=1]) 从数组头删除n个元素,相当于unshift方法
_.drop([1,2,3]) => [2,3] _.drop([1,2,3],2) => [3] _.drop([1,2,3],5) => []
1.5 _.dropRight(array,[n=1]) 从数组尾删除n个元素,相当于pop方法
_.dropRight([1, 2, 3]); // → [1, 2] _.dropRight([1, 2, 3], 2); // → [1] _.dropRight([1, 2, 3], 5); // → [] _.dropRight([1, 2, 3], 0); // → [1, 2, 3]
1.6 .dropRightWhile 1.7 .ropWhile
1.8 _.fill(array, value, [start=0], [end=array.length]) 从array[start]到array[end]替换为value,不包括array[end]
var array = [1, 2, 3]; _.fill(array, 'a'); console.log(array); // → ['a', 'a', 'a'] _.fill(Array(3), 2); // → [2, 2, 2] _.fill([4, 6, 8], '*', 1, 2); // → [4, '*', 8]
目录
chain
Array
1.1 _.chunk(array, [size=1])平均分配数组到一个新的数组中
1.2 _.compact(array) 数组去除null、0、false、“”、undefined、NaN项
1.3. _.difference(array,[values]) 差异对比,返回array中不存在[values]中的值
1.4. _.drop(array,[n=1]) 从数组头删除n个元素,相当于unshift方法
1.5 _.dropRight(array,[n=1]) 从数组尾删除n个元素,相当于pop方法
1.6 .dropRightWhile 1.7 .ropWhile
1.8 _.fill(array, value, [start=0], [end=array.length]) 从array[start]到array[end]替换为value,不包括array[end]