Javascript 如何在Javascript中的字符串中获取第n个字符？
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How to get nth character in a string in Javascript?
提问by ana
I've a string (let's say "Hello World") and I want to save the first characters of it in different variables (ex. character1 = "H", character2 = "e"...).
我有一个字符串（比如“Hello World”），我想将它的第一个字符保存在不同的变量中（例如 character1 = "H", character2 = "e"...）。
How do I get the nth character in the string?
如何获取字符串中的第 n 个字符？
Thanks!
谢谢！
Bonus: How could I do it with Python? Would it be better than doing it client-side?
奖励：我怎么能用 Python 做到这一点？它会比在客户端做更好吗？
回答by Free Consulting
Let me summarize the possibilities
让我总结一下可能性
given:
给出：
var string = "HAI";
/* and */
var index = 1; // number ∈ [0..string.length), rounded down to integer
string.charAt(index)returns"A"(preferred)string[index]returns"A"(non-standard)string.substring(index, index+1)returns"A"(over-complex solution but works)string.substr(index, 1)returns"A"(non-standard approach to above)
string.charAt(index)退货"A"（首选）string[index]退货"A"（非标准）string.substring(index, index+1)返回"A"（过于复杂的解决方案但有效）string.substr(index, 1)回报"A"（上述的非标准方法）
回答by Matthew Flaschen
回答by harto
Not sure if this is cross-browser safe, but you can use array-like indexing:
不确定这是否跨浏览器安全，但您可以使用类似数组的索引：
"Hello"[0] -> "H"
The syntax is exactly the same in Python.
语法在 Python 中完全相同。
