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Check whether variable is number or string in JavaScript
Does anyone know how can I check whether a variable is a number or a string in JavaScript?
32 Answers
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python: how to identify if a variable is an array or a scalar
...rgument NBins . I want to make a call to this function with a scalar 50 or an array [0, 10, 20, 30] . How can I identify within the function, what the length of NBins is? or said differently, if it is a scalar or a vector?
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PDOException SQLSTATE[HY000] [2002] No such file or directory
I believe that I've successfully deployed my (very basic) site to fortrabbit, but as soon as I connect to SSH to run some commands (such as php artisan migrate or php artisan db:seed ) I get an error message:
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A TwoWay or OneWayToSource binding cannot work on the read-only property
...e a read only property I need to display in a textbox, and getting this error at runtime. I've set IsEnabled="False" , IsReadOnly="True" - no luck.
Other searches say the readonly should fix it, but not for me.
I've got an ugly workaround by adding a dummy setter...
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Should image size be defined in the img tag height/width attributes or in CSS? [duplicate]
...es not always apply to image height and width.
Each image has an innate, original height and width that can be derived from the image data. In the framework of content vs layout, I would say that this derived height and width information is content, not layout, and should therefore be rendered as ...
Check if passed argument is file or directory in Bash
... simple script in Ubuntu which would allow me to pass it either a filename or a directory, and be able to do something specific when it's a file, and something else when it's a directory. The problem I'm having is when the directory name, or probably files too, has spaces or other escapable charact...
How to convert comma-separated String to List?
...ws us to convert comma separated String to some container (e.g array, List or Vector)? Or do I need to write custom code for that?
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Concurrent vs serial queues in GCD
...oncurrent: the code runs on a background thread but the main thread waits for it to finish, blocking any updates to the UI. The block can't assume that it's the only block running on that queue (I could have added another block using async a few seconds previously)
sync - serial: the code runs on a ...
What is the difference between int, Int16, Int32 and Int64?
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Each type of integer has a different range of storage capacity
Type Capacity
Int16 -- (-32,768 to +32,767)
Int32 -- (-2,147,483,648 to +2,147,483,647)
Int64 -- (-9,223,372,036,854,775,808 to +9,223,372,036,854,775,807)
As stated by James Sutherland i...
AngularJS ui-router login authentication
...e module, but here's what I've come up with. This is a complex process to work around some caveats, so hang in there. You'll need to break this down into several pieces.
Take a look at this plunk.
First, you need a service to store the user's identity. I call this principal. It can be checked to s...