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What is “:-!!” in C code?
... effect, a way to check whether the expression e can be evaluated to be 0, and if not, to fail the build.
The macro is somewhat misnamed; it should be something more like BUILD_BUG_OR_ZERO, rather than ...ON_ZERO. (There have been occasional discussions about whether this is a confusing name.)
You...
In what order are Panels the most efficient in terms of render time and performance?
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I think it is more concise and understandable to describe the performance characteristics of each panel than it is to try to give an absolute relative performance comparison.
WPF makes two passes when rendering content: Measure and Arrange. Each pane...
Better way to set distance between flexbox items
...inimal distance between flexbox items I'm using margin: 0 5px on .item and margin: 0 -5px on container. For me it seems like a hack, but I can't find any better way to do this.
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What are the ways to make an html link open a folder
...licking a link inside a web page. The path of the folder is on the network and can be accessed from everywhere. I'm probably sure there is no easy way to do this, but maybe I'm mistaken?
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Converting a List to a comma separated string
Is there a way to take a List and convert it into a comma separated string?
8 Answers
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What is a StoryBoard ID and how can i use this?
i'm new to IOS developing and recently started in Xcode 4.5. I saw for every viewController that i could set some identity variables including the storyboard ID. What is this and how can i use it?
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Boolean literals in PowerShell
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$true and $false.
Those are constants, though. There are no language-level literals for booleans.
Depending on where you need them, you can also use anything that coerces to a boolean value, if the type has to be boolean, e.g. in...
How to read the RGB value of a given pixel in Python?
... be many different formats.
pix = im.load()
print im.size # Get the width and hight of the image for iterating over
print pix[x,y] # Get the RGBA Value of the a pixel of an image
pix[x,y] = value # Set the RGBA Value of the image (tuple)
im.save('alive_parrot.png') # Save the modified pixels as ...
Elastic search, multiple indexes vs one index and types for different data sets?
I have an application developed using the MVC pattern and I would like to index now multiple models of it, this means each model has a different data structure.
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What is the purpose of a self executing function in javascript?
... blocks of JavaScript code.
For example, as mentioned in a comment by Alexander:
(function() {
var foo = 3;
console.log(foo);
})();
console.log(foo);
This will first log 3 and then throw an error on the next console.log because foo is not defined.
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