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Clean ways to write multiple 'for' loops
...3D
{
int x;
int y;
int z;
std::vector<int> myData;
public:
// ...
int& operator()( int i, int j, int k )
{
return myData[ ((i * y) + j) * z + k ];
}
};
Or if you want to index using [][][], you need an operator[]
which returns a proxy.
Once you'v...
How do you convert an entire directory with ffmpeg?
... convert an entire directory/folder with ffmpeg via command line or with a batch script?
24 Answers
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How to determine when a Git branch was created?
Is there a way to determine when a Git branch was created? I have a branch in my repo and and I don't remember creating it and thought maybe seeing the creation timestamp would jog my memory.
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Combine two ActiveRecord::Relation objects
Suppose I have the following two objects:
8 Answers
8
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C++ performance challenge: integer to std::string conversion
Can anyone beat the performance of my integer to std::string code, linked below?
13 Answers
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Why is “final” not allowed in Java 8 interface methods?
...fault methods on interfaces. There are essentially two reasons (there may be others) why they have been introduced:
5 Answ...
SQL WHERE ID IN (id1, id2, …, idn)
I need to write a query to retrieve a big list of ids.
9 Answers
9
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Using Gulp to Concatenate and Uglify files
...at I needed to use gulp-rename and also output the concatenated file first before 'uglification'. Here's the code:
var gulp = require('gulp'),
gp_concat = require('gulp-concat'),
gp_rename = require('gulp-rename'),
gp_uglify = require('gulp-uglify');
gulp.task('js-fef', function(){
...
How to convert Strings to and from UTF8 byte arrays in Java
In Java, I have a String and I want to encode it as a byte array (in UTF8, or some other encoding). Alternately, I have a byte array (in some known encoding) and I want to convert it into a Java String. How do I do these conversions?
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Python: most idiomatic way to convert None to empty string?
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If you actually want your function to behave like the str() built-in, but return an empty string when the argument is None, do this:
def xstr(s):
if s is None:
return ''
return str(s)
...