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How to elegantly rename all keys in a hash in Ruby? [duplicate]
...
ages = { 'Bruce' => 32, 'Clark' => 28 }
mappings = { 'Bruce' => 'Bruce Wayne', 'Clark' => 'Clark Kent' }
ages.transform_keys(&mappings.method(:[]))
#=> { 'Bruce Wayne' => 32, 'Clark Kent' => 28 }
...
What does the “|” (single pipe) do in JavaScript?
... @MaBi: You should however know that the value is converted to a 32-bit integer, so it won't work properly for larger numbers.
– Guffa
May 5 '15 at 17:51
1
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How to print the values of slices
...e snippet.
– pdbrito
Apr 4 '17 at 8:32
add a comment
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What is the in a .vimrc file?
...t is active.
– greg
Sep 5 '14 at 12:32
4
To the lack of feedback, while by default there is no vi...
Show/Hide the console window of a C# console application
...Here’s how:
using System.Runtime.InteropServices;
[DllImport("kernel32.dll")]
static extern IntPtr GetConsoleWindow();
[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
const int SW_HIDE = 0;
const int SW_SHOW = 5;
var handle = GetConsoleWindow();
// H...
Ruby on Rails patterns - decorator vs presenter
... Dave NewtonDave Newton
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3
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Subscripts in plots in R
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answered Sep 21 '16 at 18:32
user29609user29609
1,2131212 silver badges1818 bronze badges
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YAML Multi-Line Arrays
...
have you tried this?
-
name: Jack
age: 32
-
name: Claudia
age: 25
I get this: [{"name"=>"Jack", "age"=>32}, {"name"=>"Claudia", "age"=>25}] (I use the YAML Ruby class).
s...
Fastest way to extract frames using ffmpeg?
...t='eq(n\,1)+eq(n\,200)+eq(n\,400)+eq(n\,600)+eq(n\,800)+eq(n\,1000)',scale=320:-1 \
-vsync vfr -q:v 2 -f image2pipe -vcodec ppm - \
| montage -tile x1 -geometry "1x1+0+0<" -quality 100 -frame 1 - output.png
.
Little explanation:
In ffmpeg expressions + stands for OR and * for AND
\, is...
Eclipse: Can you format code on save?
...|
edited Apr 11 '17 at 14:32
M. A. Kishawy
4,7491010 gold badges4242 silver badges7070 bronze badges
ans...