如何仅使用索引来删除字符串的一部分(如果索引处的字符存在于其他地方，则无需使用正则表达式)？
我用这个，但看起来非常困惑!!
var str = "stringIwant to delete from";
var stringCodeLastIndex = str.length - 1;
var index2delete = 1;
var stringStart, stringEnd, finalString;
if (index2delete == 0) {
stringStart = "";
} else {
stringStart = str.substr(0, index2delete);
}
if (index2delete < stringCodeLastIndex) {
stringEnd = str.substr(index2delete + 1);
} else {
stringEnd = "";
}
finalString = stringStart + stringEnd;
最佳答案
substring足够聪明，可以自行处理无效索引:
str = "someXXXstring";
del = 4;
len = 3
str = str.substring(0, del) + str.substring(del + len);
document.body.innerText += str + ","
str = "somestringXXX";
del = 10;
len = 20
str = str.substring(0, del) + str.substring(del + len);
document.body.innerText += str + ","
str = "somestring";
del = 0;
len = 200
str = str.substring(0, del) + str.substring(del + len);
document.body.innerText += str + ","关于javascript - 按索引位置删除部分字符串，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25909291/