首頁猿問如果刪除數(shù)組中固定開頭的值呢？

如果刪除數(shù)組中固定開頭的值呢？

JavaScript

慕慕森 2018-10-10 13:10:31

比如我有一個數(shù)組，我想把數(shù)組中所有開頭帶13的刪除，為什么數(shù)組只會刪除偶數(shù)呢？而且只會刪除5個。var arr = ["1302","1303","1304","1305","1306","1307","1308","1309","1310","1311"] arr.map(function(val,index,arr){ if (arr[index].substring(0,2) == sub) { arr.splice(index,1); } }) console.log(arr[index],val,index);

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1 回答

瀟湘沐

TA貢獻1816條經(jīng)驗獲得超6個贊

arr.filter(function(item){return !item.startsWith('13')})

你不能在map的時候修改arr

var arr = ["1302","1303","1304","1305","1306","1307","1308","1309","1310","1311"];for(var i = 0 ;
 i < arr.length ; i ++){    if(arr[i].startsWith('13'))
        arr.splice(i--,1);
}

反對回復 2018-11-04