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In below code, I need to check if version string is not empty then append its value to the request variable.
if ([string]::IsNullOrEmpty($version)) { $request += "/" + $version } How to check not in if condition?
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isEmpty(String) , which checks if a string is an empty string or null. It also provides the StringUtils. isBlank(String) method, which also checks for whitespace. That's all about determining whether a String is empty or null in Java.
In C#, IsNullOrEmpty() is a string method. It is used to check whether the specified string is null or an Empty string. A string will be null if it has not been assigned a value. A string will be empty if it is assigned “” or String.
The nonNull method is a static method of the Objects class in Java that checks whether the input object reference supplied to it is non-null or not. If the passed object is non-null, then the method returns true. If the passed object is null , then the method returns false.
Use the length property to check if a string is empty, e.g. if (str. length === 0) {} . If the string's length is equal to 0 , then it's empty, otherwise it isn't empty.
A null string has no value at all. A blank String contains only whitespaces, are is neither empty nor null, since it does have an assigned value, and isn't of 0 length. In this tutorial, we'll look at how to check if a String is Null, Empty or Blank in Java.
StringUtils.isEmpty(String str) - Checks if a String is empty ("") or null. StringUtils.isBlank(String str) - Checks if a String is whitespace, empty ("") or null. the latter considers a String which consists of spaces or special characters eg " " empty too.
When the string is not null or undefined, and you intend to check for an empty one, you can use the length property of the string prototype, as follows: Another option is checking the empty string with the comparison operator “===”.
An empty string is a String object with an assigned value, but its length is equal to zero. A null string has no value at all. A blank String contains only whitespaces, are is neither empty nor null, since it does have an assigned value, and isn't of 0 length.
if (-not ([string]::IsNullOrEmpty($version))) { $request += "/" + $version } You can also use ! as an alternative to -not.
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You don't necessarily have to use the [string]:: prefix. This works in the same way:
if ($version) { $request += "/" + $version } A variable that is null or empty string evaluates to false.
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