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Unique combination of all elements from two (or more) vectors
I am trying to create a unique combination of all elements from two vectors of different size in R.
5 Answers
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how to use “AND”, “OR” for RewriteCond on Apache?
...e it isn't explained very explicitly in the documentation I'll answer this by going through the sourcecode of mod_rewrite; demonstrating a big benefit of open-source.
In the top section you'll quickly spot the defines used to name these flags:
#define CONDFLAG_NONE 1<<0
#define...
Conditional formatting based on another cell's value
I'm using Google Sheets for a daily dashboard. What I need is to change the background color of cell B5 based on the value of another cell - C5. If C5 is greater than 80% then the background color is green but if it's below, it will be amber/red.
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Get Image size WITHOUT loading image into memory
...ns in the source like:
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prefix = fp.read(16)
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fp.seek(0)
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but these hardly constitute reading the whole file. In fact .open simply returns a file object and the filename on success. In addition the docs say:
open(file, mode=”r”)
Opens and identifies the given image file...
Javascript swap array elements
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You only need one temporary variable.
var b = list[y];
list[y] = list[x];
list[x] = b;
Edit hijacking top answer 10 years later with a lot of ES6 adoption under our belts:
Given the array arr = [1,2,3,4], you can swap values in one line now like so:
[...
Find size of object instance in bytes in c#
For any arbitrary instance (collections of different objects, compositions, single objects, etc)
15 Answers
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When do you use Git rebase instead of Git merge?
When is it recommended to use Git rebase vs. Git merge?
16 Answers
16
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UnboundLocalError on local variable when reassigned after first use
The following code works as expected in both Python 2.5 and 3.0:
12 Answers
12
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Getting attributes of a class
I want to get the attributes of a class, say:
18 Answers
18
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Significance of a .inl file in C++
...finitions of inline functions.
For definitions of function templates.
In both cases, I put the declarations of the functions in a header file, which is included by other files, then I #include the .inl file at the bottom of the header file.
I like it because it separates the interface from the im...