Module: array

//[1, 2, 3, 4]let ary = [1,2];_.append(ary,3,4);console.log(ary);//[1, 2, Array(2), 5]ary = [1,2];_.append(ary,[3,4],5);console.log(ary);//[1, 2, 3, 4]ary = [1,2];_.append(ary,...[3,4]);console.log(ary);

//[[1,2],[3,4]]console.log(_.chunk([1,2,3,4],2))//[[1,2,3],[4]]console.log(_.chunk([1,2,3,4],3))

//[1,2,4,'a','1']console.log(_.compact([0,1,false,2,4,undefined,'a','1','',null]))

//[a/b/a]console.log(_.concat([{name:'a'},{name:'b'}],[{name:'a'}]))//[1, 2, 3, 1, 2]console.log(_.concat([1,2,3],[1,2]))//[1, 2, 3, 1, 2, null, 0]console.log(_.concat([1,2,3],[1,2],null,0))//[1, 2, 3, 1, 2, doms..., 0, null]console.log(_.concat([1,2,3],[1,2],document.body.children,0,null))

//[1]console.log(_.except([1,2,3],[2,3]))//[1,4]console.log(_.except([1,2,3],[2,3],[3,2,1,4]))//[{name: "b"}]console.log(_.except([{name:'a'},{name:'b'}],[{name:'a'}],v=>v.name))//[2, 3, "2", "3"] '2'和2不相等console.log(_.except([1,2,3],[1,'2',3],[2,'3',1]))

//[6, 6, 6]console.log(_.fill(new Array(3), 6))//[1, 'x', 'x', 'x', 5]console.log(_.fill([1, 2, 3, 4, 5], 'x', 1, 4))

//3 查询数组的索引console.log(_.findIndex(['a','b','c',1,3,6],_.isNumber))//0console.log(_.findIndex([{a:1},{a:2},{a:3}],'a'))//2console.log(_.findIndex([{a:1},{a:2},{a:3}],{a:3}))

//5 查询数组的索引console.log(_.findLastIndex(['a','b','c',1,3,6],_.isNumber))//2console.log(_.findLastIndex([{a:1},{a:2},{a:3}],'a'))

//1console.log(_.first([1,2,3]))//"1"console.log(_.first(new Set(['1',1])))

//[1,2,3,4,5]console.log(_.flat([1,[2,3],[4,5]]))//[1,2,3,4,5,[6,7]]console.log(_.flat([1,[2,3],[4,5,[6,7]]]))//[1,2,3,[4]]console.log(_.flat([1,[2,[3,[4]]]],2))//[1,2,1,3,4]console.log(_.flat(new Set([1,1,[2,[1,[3,4]]]]),Infinity))

//[1,2,1,3,4]console.log(_.flatDeep(new Set([1,1,[2,[1,[3,4]]]])))//[1,2,3,4]console.log(_.flatDeep([1,[2,[3,[4]]]]))

//[1, 2]console.log(_.initial([1, 2, 3]))

//[1, 2, Array(1), 'a', 3, 4]let ary = [1,2,3,4];_.insert(ary,2,[1],'a');console.log(ary);//[1, 2, 3, 4]ary = [3,4];_.insert(ary,0,1,2);console.log(ary);//func.jsconsole.log(_.insert('funcjs',4,'.').join(''));

//[2]console.log(_.intersect([1,2,3],[2,3],[1,2]))//[3]console.log(_.intersect([1,1,2,2,3],[1,2,3,4,4,4],[3,3,3,3,3,3]))//[{name: "a"}] 最后一个参数是函数时作为标识函数console.log(_.intersect([{name:'a'},{name:'b'}],[{name:'a'}],v=>v.name))//[]console.log(_.intersect())//[3] 第三个参数被忽略，然后求交集console.log(_.intersect([1,2,3],[3],undefined))//[1] "2"和2不相同，3和"3"不相同console.log(_.intersect([1,2,3],[1,'2',3],[2,'3',1]))

//'1/2/3/4'console.log(_.join([1, 2, 3, 4], '/'))//'1,2,3,4'console.log(_.join([1, 2, 3, 4]))

//3console.log(_.last([1,2,3]))

//3, [1, 2]let ary = [1,2,3];console.log(_.pop(ary),ary)//{a: 1}, [{"a":2},{"a":3}]ary = [{a:1},{a:2},{a:3}];console.log(_.pop(ary,0),ary)

//[1, 1] truelet ary = [1,2,3,4,3,2,1];let newAry = _.pull(ary,2,3,4)console.log(newAry,ary === newAry)

//[0, 1, 2, 3, 4]console.log(_.range(5))//[0, -1, -2, -3, -4]console.log(_.range(-5))//[0, -0.5, -1, -1.5, -2, -2.5, -3, -3.5, -4, -4.5]console.log(_.range(0,-5,0.5))//[-5, -4, -3, -2, -1, 0]console.log(_.range(-5,1))

//[1, 3] [2, 4]let ary = [1,2,3,4];console.log(_.remove(ary,x=>x%2),ary)//[2] [1,3]ary = [{a:1},{a:2},{a:3}];console.log(_.remove(ary,v=>v.a===2),ary)//[3] [1,2]ary = [{a:1},{a:2},{a:3}];console.log(_.remove(ary,{a:3}),ary)

//[3, 2, 1]console.log(_.reverse([1, 2, 3]))

//[2,3,4]console.log(_.slice([1,2,3,4,5],1,4))//[2,3,4,5]console.log(_.slice([1,2,3,4,5],1))

//1console.log(_.sortedIndex([1,2,3],1.5))//1console.log(_.sortedIndex(['a', 'c'], 'b'))//0console.log(_.sortedIndex([{a:1},{a:2},{a:3}], {a:2.5}))

//2console.log(_.sortedIndexBy([{a:1},{a:2},{a:3}], {a:2.5},'a'))

//[2, 3]console.log(_.tail([1, 2, 3]))

//[1, 2, 3]console.log(_.take([1, 2, 3, 4, 5],3))//[1, 2, 3, 4, 5]console.log(_.take([1, 2, 3, 4, 5]))

//[3, 4, 5]console.log(_.takeRight([1, 2, 3, 4, 5],3))//[1, 2, 3, 4, 5]console.log(_.takeRight([1, 2, 3, 4, 5]))

//[1, 2, 3]console.log(_.union([1,2,3],[2,3]))//[1, 2, 3, "1", "2"]console.log(_.union([1,2,3],['1','2']))//[{name: "a"},{name: "b"}]console.log(_.union([{name:'a'},{name:'b'}],[{name:'a'}],v=>v.name))//[a/b/a] 没有标识函数无法去重console.log(_.union([{name:'a'},{name:'b'}],[{name:'a'}]))//[1, 2, 3, "3"] "3"和3不相等console.log(_.union([1,2,3],[1,3],[2,'3',1]))

// [1,2,4,"a","1",null]console.log(_.unique([1,2,2,4,4,'a','1','a',null,null]))

// [{"a":1},{"a":"1"},{"a":2},{"a":"2"}]console.log(_.uniqBy([{a:1},{a:1},{a:'1'},{a:2},{a:'2'},{a:2}],'a'))// [{"a":1},{"a":2}]console.log(_.uniqBy([{a:1},{a:1},{a:'1'},{a:2},{a:'2'},{a:2}],v=>v.a>>0))

//[[1,2,undefined],['a','b','c']]console.log(_.unzip([[1, 'a'],[2, 'b'],[undefined, 'c']]))//[['a', 'b', 'c'], [1, 2, undefined],['1', undefined,undefined]]console.log(_.unzip([['a', 1, '1'], ['b', 2],['c']]))

//[1, 1]console.log(_.without([1,2,3,4,3,2,1],2,3,4))

//[[1, 'a'],[2, 'b'],[undefined, 'c']]console.log(_.zip([1,2],['a','b','c']))//[['a', 1, '1'], ['b', 2, undefined],['c', undefined,undefined]]console.log(_.zip(['a','b','c'],[1,2],['1']))

//{a: 1, b: 2}console.log(_.zipObject(['a','b'],[1,2,3]))

//[[1, 3, 5], [2, 4, 6]]console.log(_.zipWith([1,2],[3,4],[5,6]))//[9, 12]console.log(_.zipWith([1,2],[3,4],[5,6],_.sum))//[3, 4]console.log(_.zipWith([1,2],[3,4],[5,6],group=>_.avg(group)))