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Check if a key exists inside a json object

The above is the JSON object I'm dealing with. I want to check if the 'merchant_id' key exists. I tried the below code, but it's not working. Any way to achieve it? ...
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Why don't structs support inheritance?

I know that structs in .NET do not support inheritance, but its not exactly clear why they are limited in this way. 10 An...
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Open a URL in a new tab (and not a new window)

I'm trying to open a URL in a new tab, as opposed to a popup window. 33 Answers 33 ...
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test if event handler is bound to an element in jQuery [duplicate]

Is it possible to determine whether an element has a click handler, or a change handler, or any kind of event handler bound to it using jQuery? ...
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Reorder / reset auto increment primary key

I have a MySQL table with an auto increment primary key. I deleted some rows in the middle of the table. Now I have, for example, something like this in the ID column: 12, 13, 14, 19, 20. I deleted the 15, 16, 17 and 18 rows. ...
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Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./

I'm trying to create a Regex test in JavaScript that will test a string to contain any of these characters: 6 Answers ...
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Using Git how do I find changes between local and remote

Here are two different questions but I think they are related. 10 Answers 10 ...
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Python: Best way to add to sys.path relative to the current running script

I have a directory full of scripts (let's say project/bin ). I also have a library located in project/lib and want the scripts to automatically load it. This is what I normally use at the top of each script: ...
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How do I split a string by a multi-character delimiter in C#?

What if I want to split a string using a delimiter that is a word? 10 Answers 10 ...
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How to get screen dimensions as pixels in Android

I created some custom elements, and I want to programmatically place them to the upper right corner ( n pixels from the top edge and m pixels from the right edge). Therefore I need to get the screen width and screen height and then set position: ...