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Checking if a double (or float) is NaN in C++
...se IEEE floating point, this trick should work. But I can't guarantee that it will work in practice. Check with your compiler, if in doubt.
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Are (non-void) self-closing tags valid in HTML5?
The W3C validator doesn't like self-closing tags (those that end with " /> ") on non-void elements. (Void elements are those that may not ever contain any content.) Are they still valid in HTML5?
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HTML5 Canvas vs. SVG vs. div
...The short answer:
SVG would be easier for you, since selection and moving it around is already built in. SVG objects are DOM objects, so they have "click" handlers, etc.
DIVs are okay but clunky and have awful performance loading at large numbers.
Canvas has the best performance hands-down, but y...
Re-raise exception with a different type and message, preserving existing information
I'm writing a module and want to have a unified exception hierarchy for the exceptions that it can raise (e.g. inheriting from a FooError abstract class for all the foo module's specific exceptions). This allows users of the module to catch those particular exceptions and handle them distinctly,...
Truly understanding the difference between procedural and functional
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Functional Programming
Functional programming refers to the ability to treat functions as values.
Let's consider an analogy with "regular" values. We can take two integer values and combine them using the + operator to obtain a new integer. Or we can multiply an integer by a floating p...
PHP Pass variable to next page
It seems pretty simple but I can't find a good way to do it.
8 Answers
8
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Get all directories within directory nodejs
...name)).filter(isDirectory)
Update for Node 10.10.0+
We can use the new withFileTypes option of readdirSync to skip the extra lstatSync call:
const { readdirSync } = require('fs')
const getDirectories = source =>
readdirSync(source, { withFileTypes: true })
.filter(dirent => dirent.i...
If i synchronized two methods on the same class, can they run simultaneously?
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Both methods lock the same monitor. Therefore, you can't simultaneously execute them on the same object from different threads (one of the two methods will block until the other is finished).
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Signed versus Unsigned Integers
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Unsigned can hold a larger positive value, and no negative value.
Yes.
Unsigned uses the leading bit as a part of the value, while the signed version uses the left-most-bit to identify if the number is positive or negative.
There are different w...
Opacity of div's background without affecting contained element in IE 8?
I want to set Opacity of div's background without affecting contained element in IE 8. have a any solution and don't answer to set 1 X 1 .png image and set opacity of that image because I am using dynamic opacity and color admin can change that
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