删除字符串中的第一个字符

Question

i have this script which takes the input and adds "ay" to the end and i also need to delete the first letter of each string which doesnt work. I tried using .substring(1) but it didnt work.

https://jsfiddle.net/kaibago/try07L8h/

$(document).ready(function(){
    $("#button").click(function(){
        var input=$("input[name=checkListItem]").val();
        var toAdd=input.split(" ");
        for(var i=0;i<toAdd.length;i++){
            toAdd[i]+=toAdd[i][0]+"ay";
            //toAdd[i]=toAdd[0].substring(1); does not work supposed to delete first letter of each string//
        };
    var output=toAdd.join(" ");
    $(".list").append("<div class='item'>"+output+"</div>");
    });
});

Answer 1

You can use slice

$(document).ready(function(){
    $("#button").click(function(){
        var input=$("input[name=checkListItem]").val();
        var toAdd=input.split(" ");
        for(var i=0;i<toAdd.length;i++){
            toAdd[i]+=toAdd[i][0]+"ay";
            toAdd[i].slice(1);
        };
    var output=toAdd.join(" ");
    $(".list").append("<div class='item'>"+output+"</div>");
    });
});

Answer 2

subscript() isn't a function in JavaScript. What you're looking for is substring() .

toAdd[i] = toAdd[i].substring(1);

Answer 3

Working fiddle

Your code work fine after changing two things.

First : replace subscript() by substring() .

Second :

Instead of

//e.g : input='abcd', this will return 'abcdaay' (Note double 'a')
toAdd[i]+=toAdd[i][0]+"ay";

Use :

//e.g : input='abcd', this will return 'abcday'
toAdd[i]=toAdd[i]+"ay"; 

Because you don't need the [0] that select first character and also not use += in this case because you want to rewrite the value and not append first character to it.

Full code :

$(document).ready(function(){
    $("#button").click(function(){
        var input=$("input[name=checkListItem]").val();
        var toAdd=input.split(" ");

        for(var i=0;i<toAdd.length;i++)
            toAdd[i] = (toAdd[i]+"ay").substring(1);

        $(".list").append("<div class='item'>"+toAdd.join(" ")+"</div>");
    });
});

Hope this helps.

Answer 4

substr方法应该可以帮到你。

toAdd[i] += (toAdd[i][0]+"ay").substr(1);