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Is there a built-in IsNullOrEmpty-like function in order to check if a string is null or empty, in PowerShell?
I could not find it so far and if there is a built-in way, I do not want to write a function for this.
271
You can use the IsNullOrWhiteSpace method to test whether a string is null , its value is String. Empty, or it consists only of white-space characters.
Type-check with the -is operator returns false for any null value. In most cases, if not all, $value -is [System. Object] will be true for any possible non-null value.
The isEmpty() method checks whether a string is empty or not. This method returns true if the string is empty (length() is 0), and false if not.
A variable is NULL until you assign a value or an object to it. This can be important because there are some commands that require a value and generate errors if the value is NULL.
You guys are making this too hard. PowerShell handles this quite elegantly e.g.:
> $str1 = $null > if ($str1) { 'not empty' } else { 'empty' } empty > $str2 = '' > if ($str2) { 'not empty' } else { 'empty' } empty > $str3 = ' ' > if ($str3) { 'not empty' } else { 'empty' } not empty > $str4 = 'asdf' > if ($str4) { 'not empty' } else { 'empty' } not empty > if ($str1 -and $str2) { 'neither empty' } else { 'one or both empty' } one or both empty > if ($str3 -and $str4) { 'neither empty' } else { 'one or both empty' } neither empty If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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