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How to get an array of specific “key” in multidimensional array without looping
...ap(function ($ar) {return $ar['id'];}, $users);
Before(Technically php 4.0.6+), you must create an anonymous function with create_function instead:
$ids = array_map(create_function('$ar', 'return $ar["id"];'), $users);
s...
How can I rename a field for all documents in MongoDB?
Assuming I have a collection in MongoDB with 5000 records, each containing something similar to:
7 Answers
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RelativeLayout is taking fullscreen for wrap_content
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Jun 26 '11 at 20:15
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Does constexpr imply inline?
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140
Yes ([dcl.constexpr], §7.1.5/2 in the C++11 standard): "constexpr functions and constexpr const...
Get current value of a setting in Vim
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answered Jan 16 '10 at 17:28
JaredParJaredPar
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Ruby on Rails patterns - decorator vs presenter
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104
A decorator is more of a "let's add some functionality to this entity". A presenter is more of ...
Loop through Map in Groovy?
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edited Sep 19 '17 at 13:07
answered Apr 5 '12 at 23:23
Ja...
Resumable downloads when using PHP to send the file?
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103
The first thing you need to do is to send the Accept-Ranges: bytes header in all responses, to ...
How to prevent gcc optimizing some statements in C?
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unsigned char *pageptr = ...;
((unsigned char volatile *)pageptr)[0] = pageptr[0];
The volatile type qualifier instructs the compiler to be strict about memory stores and loads. One purpose of volatile is to let the compiler know that the memory access has side effects, and therefore mus...
Gradient of n colors ranging from color 1 and color 2
...friend here:
colfunc <- colorRampPalette(c("black", "white"))
colfunc(10)
# [1] "#000000" "#1C1C1C" "#383838" "#555555" "#717171" "#8D8D8D" "#AAAAAA"
# [8] "#C6C6C6" "#E2E2E2" "#FFFFFF"
And just to show it works:
plot(rep(1,10),col=colfunc(10),pch=19,cex=3)
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