// 假值转换为0 let toZero = (arr)=>{ return arr.map(v=>v||0) } let c = [1,2,3,0,false,null,undefined,NaN,''] console.log(toZero(c)); // [1, 2, 3, 0, 0, 0, 0, 0, 0]
上面这个方法可以把假值,转换为0,但是不能把'0.00','0','0.0000'之类的值转换成为0,因为'0.00','0','0.000'这类的值是真值
所以,如果要把类似'0.00'这样的值转换为0那就要下面的方法
// 假值转为 0 ,包括'0','0.00','0.0000'和 空字符串,字符串数字转为数字 let toZero2 = (arr)=>{ let newArr = [] arr.forEach(v=>{ typeof v!=='string'? ( v = v || 0) :(v = Number(v) || 0) newArr.push(v) }) return newArr } let d = [1,2,0,'0','0.00','0.0000',undefined,null,false,NaN,3,'','0.03','0.9','100','0.4236'] console.log(toZero2(d));// [1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0.03, 0.9, 100, 0.4236]
还可以这样:
let q = [1,2,0,'0','0.00','0.0000',undefined,null,false,NaN,3,'','0.03','0.9','100','0.4236'] let toZero3 = (arr)=>{ let newArr = [] arr.forEach(v=>{ typeof v!== 'number'?typeof v === 'string'?(v=+v):(v=0) : !(!!v) && (v=0) newArr.push(v) }) return newArr } console.log(toZero3(q));