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How do I create ColorStateList programmatically?
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The first dimension is an array of state sets,
the second ist the state set itself.
The colors array lists the colors for each matching state set, therefore the length of the colors array has to match the first dimension of the states array (or it wil...
How to get IntPtr from byte[] in C#
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Not sure about getting an IntPtr to an array, but you can copy the data for use with unmanaged code by using Mashal.Copy:
IntPtr unmanagedPointer = Marshal.AllocHGlobal(bytes.Length);
Marshal.Copy(bytes, 0, unmanagedPointer, bytes.Length);
// Call unmanaged code
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Is it faster to count down than it is to count up?
...in the loop. If the loop index variable is used only to index into static arrays (arrays of known size at compile time), the array indexing can be done as ptr + array size - loop index var, which can still be a single instruction in x86. It's pretty wild to be debugging assembler and see the loop c...
Storing Data in MySQL as JSON
...t you are doing. In fact I've used it a lot for temporary cache storage of array data and some other situations where you achieve a faster result and less code. Many projects in reality have some mixed features.
– Heroselohim
Oct 5 '15 at 21:02
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Transpose/Unzip Function (inverse of zip)?
...on-empty iterables.
As a bonus of singledispatching we can handle numpy arrays like
import numpy as np
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transpose.register(np.ndarray, np.transpose)
and then use it like
>>> array = np.arange(4).reshape((2,2))
>>> array
array([[0, 1],
[2, 3]])
>>> transpos...
What does yield mean in PHP?
... we got there.
When we use range PHP, will execute it, create the entire array of numbers in memory and return that entire array to the foreach loop which will then go over it and output the values. In other words, the foreach will operate on the array itself. The range function and the foreach on...
Most efficient way to concatenate strings?
...ring), but here I show the simple case of concatenating all strings in an array into a single string, with no separator. Latest version here is developed and unit-tested on C# 7 and .NET 4.7.
There are two keys to higher performance; the first is to pre-compute the exact total size required. This ...
Is there an equivalent for var_dump (PHP) in Javascript?
...ut it indicates the data type as well as the value and it iterates through array's and objects [even if they are Arrays of Objects and vice versa]. I'm sure this can be improved on. I'm more of a PHP guy.
/**
* Does a PHP var_dump'ish behavior. It only dumps one variable per call. The
* first...
How to find the kth largest element in an unsorted array of length n in O(n)?
I believe there's a way to find the kth largest element in an unsorted array of length n in O(n). Or perhaps it's "expected" O(n) or something. How can we do this?
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Add st, nd, rd and th (ordinal) suffix to a number
...tive integers, see below for other variations)
Explanation
Start with an array with the suffixes ["st", "nd", "rd"]. We want to map integers ending in 1, 2, 3 (but not ending in 11, 12, 13) to the indexes 0, 1, 2.
Other integers (including those ending in 11, 12, 13) can be mapped to anything els...