Js obtains the summary of the last string method, and js obtains the string summary.

Js obtains the summary of the last string method, and js obtains the string summary.

Method 1: Use the charAt method of the String object

The charAt () method returns characters at a specified position.

Copy codeThe Code is as follows:
Str. charAt (str. length-1)

Please note that JavaScript does not have a character data type different from the string type, so the returned character is a string with a length of 1

Method 2: Use the substr method under the String object

The substr () method extracts a specified number of characters starting with the start subscript from a string.

Copy codeThe Code is as follows:
Str. substr (str. length-1, 1)

Important: ECMAscript does not standardize this method, so it is opposed to using it.

Important: in IE 4, the value of start is invalid. In this BUG, start specifies the position of 0th characters. (Www.jb51.net) in a later version, this BUG has been fixed.

Method 3: Use the split method under the String object

The split () method is used to split a string into a string array.

Copy codeThe Code is as follows:
Var str = 123456 ″;
Spstr = str. split ("");
Spstr [spstr. length-1];

Method 4: RegEx

Copy codeThe Code is as follows:
<Script type = "text/javascript">
// <! [CDATA [
Var s = "nasofj; n234n41; v ";
Alert ("String:" + s + "nn" + "LastOne:" + s. replace (/^ (. * [n]) *. *(. | n) $/g, "$2 "));
//]>
</Script>

The above four methods have been recorded. If you need them, please refer to them. If you have other methods, please let me know. Thank you.