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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...
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
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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...
What are database normal forms and can you give examples? [closed]
...self. A casual user should be able to read your answer and get some value from it without having to click the blog link. The answer should be self-contained, in other words.
– Robert Harvey
Oct 22 '12 at 23:03
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What is the use of the %n format specifier in C?
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From here we see that it stores the number of characters printed so far.
n The argument shall be a pointer to an integer into which is written the number of bytes written to the output so far by this call to one of the ...
URL encode sees “&” (ampersand) as “&” HTML entity
...ing to encodeURIComponent(), which is the correct method to use, is coming from the result of accessing the innerHTML property. The solution is to get the innerText/textContent property value instead:
var str,
el = document.getElementById("myUrl");
if ("textContent" in el)
str = encodeUR...