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What does the “map” method do in Ruby?
... from rails to ruby.
h = {a: 1, b: 2, c: 3}
h.transform_values { |v| v * 10 }
#=> {a: 10, b: 20, c: 30}
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Hash Code and Checksum - what's the difference?
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Zach ScrivenaZach Scrivena
26.8k1010 gold badges5959 silver badges7171 bronze badges
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How to add leading zeros?
...of digits to begin with, so let's try a harder example of making powers of 10 width 8 too.
anim <- 25499:25504
x <- 10 ^ (0:5)
paste (and it's variant paste0) are often the first string manipulation functions that you come across. They aren't really designed for manipulating numbers, but...
Items in JSON object are out of order using “json.dumps”?
...dDict's init really ugly
– jean
Apr 10 '15 at 6:31
3
@jean: the initial value has nothing to do w...
Showing all errors and warnings [duplicate]
...ile?
– oshirowanen
Mar 25 '11 at 21:10
1
already this question has been posted stackoverflow.com/...
How can I call controller/view helper methods from the console in Ruby on Rails?
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edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Jul 21 '09 at 19:15
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How to make button look like a link?
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10
If you don't want all buttons to be styled as links, scope the style with something like button.link {...styles...} then <button class="...
What does “|=” mean? (pipe equal operator)
...ic static final int DEFAULT_VIBRATE = 2; // is the same than 1<<1 or 10 in binary
public static final int DEFAULT_LIGHTS = 4; // is the same than 1<<2 or 100 in binary
So you can use bit-wise OR to add flags
int myFlags = DEFAULT_SOUND | DEFAULT_VIBRATE; // same as 001 | 010, producin...
Can't find the 'libpq-fe.h header when trying to install pg gem
...ackage (at least in the following Ubuntu versions:
11.04 (Natty Narwhal), 10.04 (Lucid Lynx), 11.10 (Oneiric Ocelot), 12.04 (Precise Pangolin), 14.04 (Trusty Tahr) and 18.04 (Bionic Beaver)):
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/usr/include/postgresql/libpq-fe.h
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So try installing libpq-dev or its equivalent for your OS:
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Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances? [closed]
...acStadium appears to offer faster machines for less money.
UPDATE #3 (Oct 10th, 2017):
We are still with MacStadium.com, and love them. In the past few years, we've had great connectivity/uptime. When I've needed hands-on support to plug in a Time Machine backup, they've been great. They recently p...