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How to work with Git branches and Rails migrations
I am working on a rails app with quite a few git branches and many of them include db migrations. We try to be careful but occasionally some piece of code in master asks for a column that got removed/renamed in another branch.
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Why use iterators instead of array indices?
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The first form is efficient only if vector.size() is a fast operation. This is true for vectors, but not for lists, for example. Also, what are you planning to do within the body of the loop? If you plan on accessing the elements as ...
Hard reset of a single file
I currently have three modified files in my working directory. However I want one of them to be reset to the HEAD status.
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How to encode URL parameters?
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With PHP
echo urlencode("http://www.image.com/?username=unknown&password=unknown");
Result
http%3A%2F%2Fwww.image.com%2F%3Fusername%3Dunknown%26password%3Dunknown
With Javascript:
var myUrl = "http://www.image.com/?username=unknown&password=unknown";
var encodedURL= "http://www.fooba...
How to check if element exists using a lambda expression?
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Also worth noting: if you want to negate the check use noneMatch instead of anyMatch.
– Blacklight
Aug 9 '18 at 9:02
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bootstrap popover not showing on top of all elements
I'm working on a bootstrap site and after updating to bootstrap 2.2 from 2.0 everything worked except the popover.
15 Answe...
C++ Const Usage Explanation
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Read this: https://isocpp.org/wiki/faq/const-correctness
The final const means that the function Method3 does not modify the non mutable members of its class.
const int* const means a constant pointer to a constant int: i.e. a pointer that cannot be...
What is href=“#” and why is it used?
...ites I see links that have href="#" . What does it mean? What is it used for?
9 Answers
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C fopen vs open
...e first place if you want a FILE *. So including fdopen in that list is incorrect and confusing because it isn't very much like the others. I will now proceed to ignore it because the important distinction here is between a C standard FILE * and an OS-specific file descriptor.
There are four main r...
How do I check if a given string is a legal/valid file name under Windows?
...uggestion on how to use these in a regular expression.
UPD2: Note that according to the Remarks section in MSDN "The array returned from this method is not guaranteed to contain the complete set of characters that are invalid in file and directory names." The answer provided by sixlettervaliables g...