string isnullorempty vs isnullorwhitespace
/* IsNullOrWhiteSpace is a convenience method that is similar to
the following code, except that it offers superior performance: */
return String.IsNullOrEmpty(value) || value.Trim().Length == 0;
/* White-space characters are defined by the Unicode standard.
The IsNullOrWhiteSpace method interprets any character that returns
a value of true when it is passed to the Char.IsWhiteSpace method as
a white-space character. */string concatenation in js
var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
console.log(res);Copyright © 2021 Codeinu
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