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Why does one often see “null != variable” instead of “variable != null” in C#?

...ifference in the excecution speed for the order in which you state the condition? 9 Answers ...
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How to attach file to a github issue?

I migrated with a project from Bitbucket to Github and I can not find a way to attach a file to an issue (ex: screenshot, specs, etc) ...
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Pass a parameter to a fixture function

...# test_parameterized_fixture.py import pytest class MyTester: def __init__(self, x): self.x = x def dothis(self): assert self.x @pytest.fixture def tester(request): """Create tester object""" return MyTester(request.param) class TestIt: @pytest.mark.parametri...
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Is there a SASS.js? Something like LESS.js?

I have used LESS.js before. It's easy to use, something like 7 Answers 7 ...
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How to determine whether a Pandas Column contains a particular value

... entry in a Pandas column that has a particular value. I tried to do this with if x in df['id'] . I thought this was working, except when I fed it a value that I knew was not in the column 43 in df['id'] it still returned True . When I subset to a data frame only containing entries matching the ...
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CSS Classes & SubClasses

Is it possible, other than what I'm doing because it doesn't seem to work, to do this? I want to be able to have subclasses that are under a class to use the CSS specifically for that class.subclass. ...
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JSLint is suddenly reporting: Use the function form of “use strict”

... Include 'use strict'; as the first statement in a wrapping function, so it only affects that function. This prevents problems when concatenating scripts that aren't strict. See Douglas Crockford's latest blog post Strict Mode Is Coming To Town. Example from that post: (function () { 'use s...
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Nginx 403 error: directory index of [folder] is forbidden

I have 3 domain names and am trying to host all 3 sites on one server (a Digital Ocean droplet) using Nginx. 19 Answers ...
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How to check if element has any children in Javascript?

...an element which I am grabbing via .getElementById () . How do I check if it has any children? 8 Answers ...
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iPhone UITextField - Change placeholder text color

I'd like to change the color of the placeholder text I set in my UITextField controls, to make it black. 32 Answers ...