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Why does the order of the loops affect performance when iterating over a 2D array?
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As others have said, the issue is the store to the memory location in the array: x[i][j]. Here's a bit of insight why:
You have a 2-dimensional array, but memory in the computer is inherently 1-dimensional. So while you imagine your array like this:
0,0 | 0,1 | 0...
How to pick an image from gallery (SD Card) for my app?
This question was originally asked for Android 1.6.
10 Answers
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Error: “Cannot modify the return value” c#
...ause Point is a value type (struct).
Because of this, when you access the Origin property you're accessing a copy of the value held by the class, not the value itself as you would with a reference type (class), so if you set the X property on it then you're setting the property on the copy and then...
Get top n records for each group of grouped results
...e is one way to do this, using UNION ALL (See SQL Fiddle with Demo). This works with two groups, if you have more than two groups, then you would need to specify the group number and add queries for each group:
(
select *
from mytable
where `group` = 1
order by age desc
LIMIT 2
)
UNION A...
Where can I find the TypeScript version installed in Visual Studio?
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If you only have TypeScript installed for Visual Studio then:
Start the Visual Studio Command Prompt
Type tsc -v and hit Enter
Visual Studio 2017 versions 15.3 and above bind the TypeScript version to individual projects, as this answer points out:
Ri...
What is a correct mime type for docx, pptx etc?
For older *.doc documents this was enough:
10 Answers
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git:// protocol blocked by company, how can I get around that?
...tempting something like git clone git://github.com/ry/node.git will not work, it results in:
7 Answers
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How to make a flat list out of list of lists?
I wonder whether there is a shortcut to make a simple list out of list of lists in Python.
42 Answers
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Is it possible to define more than one function per file in MATLAB, and access them from outside tha
When I was studying for my undergraduate degree in EE, MATLAB required each function to be defined in its own file, even if it was a one-liner.
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Combine multiple Collections into a single logical Collection?
...using guava collections and I wonder how I could use guava iterables/iterators to generate a logical view on the internal collections without making temporary copies.
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