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printf with std::string?
...riting C++, you generally want to avoid printf entirely -- it's a leftover from C that's rarely needed or useful in C++.
As to why you should use cout instead of printf, the reasons are numerous. Here's a sampling of a few of the most obvious:
As the question shows, printf isn't type-safe. If the...
How to use the IEqualityComparer
...lass to do this work, but the execution of the function causes a big delay from the function without distinct, from 0.6 sec to 3.2 sec!
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What is the minimum valid JSON?
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@jmoreno: Surely the quote from section 2"A JSON text is a serialized object or array." Opposes that? JSON Lint also does not think a non-array or object is valid. There is no debate over whether a string is a valid JSON literal; this is over whether a...
How can I apply a function to every row/column of a matrix in MATLAB?
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You may want the more obscure Matlab function bsxfun. From the Matlab documentation, bsxfun "applies the element-by-element binary operation specified by the function handle fun to arrays A and B, with singleton expansion enabled."
@gnovice stated above that sum and other basic...
Indenting #defines
...not indented most of the time, because these directives operate separately from the rest of your code. Directives such as #ifdef are handled by the pre-processor, before the compiler ever sees your code, so a block of code after an #ifdef directive may not even be compiled.
Keeping directives visua...
raw vs. html_safe vs. h to unescape html
...n that, but it's basically it). This way, you can return HTML Safe strings from helpers or models at will.
h can only be used from within a controller or view, since it's from a helper. It will force the output to be escaped. It's not really deprecated, but you most likely won't use it anymore: the...
How to convert date to timestamp in PHP?
How do I get timestamp from e.g. 22-09-2008 ?
19 Answers
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When do I really need to use atomic instead of bool? [duplicate]
... Just for clarity's sake. @Vincent's comment may have originated from an understanding of the keyword volatile in Java. The volatile keyword in Java does control memory fences but has a very different behavior than the volatile keyword in C which does not. This question explains the diff...
#define macro for debug printing in C?
...ebugging. Several times, having the printing always validated has saved me from later problems.
I use NDEBUG to control assertions only, and a separate macro (usually DEBUG) to control whether debug tracing is built into the program. Even when the debug tracing is built in, I frequently do not want...
Why does HTML think “chucknorris” is a color?
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It's a holdover from the Netscape days:
Missing digits are treated as 0[...]. An incorrect digit is simply interpreted as 0. For example the values #F0F0F0, F0F0F0, F0F0F, #FxFxFx and FxFxFx are all the same.
It is from the blog post A...