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What do @, - and + do as prefixes to recipe lines in Make?
...
@ prevents the command line from echoing out to the console. You can do it globally with -s or --keep-silent
- tells make to keep going, even if the command fails for some reason. You can do it globally via the -i flag (or --ignore-errors).
+ I was no...
Blocks on Swift (animateWithDuration:animations:completion:)
...it is hiding slowly and when it is completely transparent; removes it self from parent view
ok variable will always returns true with animation termination.
alpha = 1
UIView.animate(withDuration: 0.5, animations: {
self.alpha = 0
}) { (ok) in
print("Ended \(ok)")
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How to check if a number is a power of 2
... 0);
}
Explanation
First and foremost the bitwise binary & operator from MSDN definition:
Binary & operators are predefined for the integral types and bool. For
integral types, & computes the logical bitwise AND of its operands.
For bool operands, & computes the logical AN...
Are there any worse sorting algorithms than Bogosort (a.k.a Monkey Sort)? [closed]
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From David Morgan-Mar's Esoteric Algorithms page: Intelligent Design Sort
Introduction
Intelligent design sort is a sorting algorithm based on the theory of
intelligent design.
Algorithm Description
The p...
Fastest way to check if a value exists in a list
...ay to do it.
You can also consider using a set, but constructing that set from your list may take more time than faster membership testing will save. The only way to be certain is to benchmark well. (this also depends on what operations you require)
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how to change directory using Windows command line
...ironment variable, for example cd %temp%. In case if current drive differs from temp folder drive cd %temp% do nothing. cd /d %temp% should be used as @Stephan said
– oleksa
Nov 17 '15 at 11:26
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Specifying an Index (Non-Unique Key) Using JPA
...u like living on the edge, you can get the latest snapshot for eclipselink from their maven repository (groupId:org.eclipse.persistence, artifactId:eclipselink, version:2.5.0-SNAPSHOT). For just the JPA annotations (which should work with any provider once they support 2.1) use artifactID:javax.pers...
Can we have functions inside functions in C++?
...h, that's neat! I didn't think of it. This is much better than my idea, +1 from me.
– sbi
Dec 1 '10 at 13:32
1
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Comment out text in R Markdown (Rmd file)
...```{r}
# x = pi
# ```
---
Note however that this does not prevent knitr from evaluating inline r code.
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Find the closest ancestor element that has a specific class
...hod when you need to get a parent container which might be up a few levels from the given element, like finding the containing <form> of a clicked <button>. Looks through the parents until the matching selector is found, or until it reaches the <body>. Returns either the matching e...