is-empty

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Check if array is empty or null

I would like to know how to check if an array is empty or null in jQuery. I tried array.length === 0 but it didn\'t work. It did not throw any error either.[详细]

2023-03-30 16:42 分类：问答
'IsNullOrWhitespace' in JavaScript?

Is there a JavaScript equivalent to .NET\'s String.IsNullOrWhitespace so that I can check if a textbox on the client-side has开发者_开发百科 any visible text in it?[详细]

2023-02-22 02:28 分类：问答
C# empty property

What\'s the preferred way to implement IsEmpty statement for your own container-like class? It could be a simple method bool IsEmpty() or you could have some gettable property IsEmpty / Empty.[详细]

2023-02-21 23:34 分类：问答
Using if(!empty) with multiple variables not in an array

I am trying to polish some code with the if(!empty) function in PHP but I don\'t know how to apply this to multiple variables when they are not an array (as I had to do previously) so if I have:[详细]

2023-02-11 10:54 分类：问答
How to convert empty spaces into null values, using SQL Server?

I have a table and the columns on this table contains empty spaces for some records. Now I need to move the data to another table and replace the empty spaces with a NULL value.[详细]

2023-01-16 03:45 分类：问答
Javascript: Checking if an object has no properties or if a map/associative-array is empty [duplicate]

This question already has answers here: Closed 12 years ago. Possible Duplicate: How do I test for an empty Javascript object from JSON?[详细]

2023-01-10 08:36 分类：问答
How do I detect empty cells in a cell array?

How do I detect empty cells in a cell array? I know the command to remove the empty cell is a(1) = [], but I can\'t seem to get MATLAB to automatically detect which cells are empty.[详细]

2023-01-10 06:27 分类：问答
VBA Check if variable is empty

I have an object and within it I wanna check if some properties is set to false, like: If (not objresult.EOF) Then[详细]

2023-01-09 06:31 分类：问答
How to find whether or not a variable is empty in Bash

How ca开发者_Go百科n I check if a variable is empty in Bash?In Bash at least the following command tests if $var is empty:[详细]

2023-01-03 15:16 分类：问答
Is there a difference between return myVar vs. return (myVar)?

I was looking at some exa开发者_如何学JAVAmple C# code, and noticed that one example wrapped the return in ()\'s.[详细]

2022-12-19 12:04 分类：问答