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How to check for an undefined or null variable in JavaScript?
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69
Checking null with normal equality will also return true for undefined.
if (window.variable ==...
Python - Get path of root project structure
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69
Other answers advice to use a file in the top-level of the project. This is not necessary if yo...
Can we instantiate an abstract class?
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69
It's sounds like the interviewer was more invested in his answer than he was in yours...
– Neil T.
D...
How to check if remote branch exists on a given remote repository?
...ound you will get the following output:
b523c9000c4df1afbd8371324083fef218669108 refs/heads/branch-name
Otherwise no output will be sent.
So piping it to wc will give you 1 or 0:
$ git ls-remote --heads git@github.com:user/repo.git branch-name | wc -l
Alternatively you can set --exit-code f...
How to correctly iterate through getElementsByClassName
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If you use the new querySelectorAll you can call forEach directly.
document.querySelectorAll('...
Github: readonly access to a private repo
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I have it on good authority that the (relatively new) "Organizations" feature allows you to add...
How do I access call log for android?
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69
This is for accessing phone call history:
As of Jellybean (4.1) you need the following permiss...
Mark parameters as NOT nullable in C#/.NET?
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69
There's nothing available at compile-time, unfortunately.
I have a bit of a hacky solution whi...
unique object identifier in javascript
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Update My original answer below was written 6 years ago in a style befitting the times and my u...
String literals: Where do they go?
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R Samuel KlatchkoR Samuel Klatchko
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