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Why does the order of the loops affect performance when iterating over a 2D array?
... x[1][0] etc...
Meaning that you're hitting them all in order. Now look at the 1st version. You're doing:
x[0][0]
x[1][0]
x[2][0]
x[0][1]
x[1][...
How do I get the current Date/time in DD/MM/YYYY HH:MM format?
... assumed you meant HH:MM instead of HH:SS, but it's easy to change):
Time.now.strftime("%d/%m/%Y %H:%M")
#=> "14/09/2011 14:09"
Updated for the shifting:
d = DateTime.now
d.strftime("%d/%m/%Y %H:%M")
#=> "11/06/2017 18:11"
d.next_month.strftime("%d/%m/%Y %H:%M")
#=> "11/07/2017 18:11"
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Mapping two integers to one, in a unique and deterministic way
...s is the correct answer for unbounded integers.
– Unknown
May 28 '09 at 7:53
4
How can i get agai...
Specifying rails version to use when creating a new application
... that having Rails 3 installed fails for 2.3.5 -- Just tested on Mac OS X Snow Leopard with these modules installed:rails (3.0.5, 2.3.5, 2.2.2, 1.2.6)
– Mike
May 2 '11 at 19:41
13
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Formatting “yesterday's” date in python
... for options, you can as well use Pendulum (pendulum.eustace.io): pendulum.now().subtract(days=-1).strftime('%m%d%y')
– AFD
May 15 '19 at 11:22
add a comment
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Why does (0 < 5 < 3) return true?
... editing my question to add the if(0 < 5 < 1) == false. All is clear now, thanks :)
– punkrockbuddyholly
Nov 3 '10 at 16:39
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How to add multiple files to Git at the same time
...4: add untracked
5: patch 6: diff 7: quit 8: help
What now>
If you press 2 then enter you will get a list of available files to be added:
What now> 2
staged unstaged path
1: unchanged +0/-1 TODO
2: unchanged +1/-1 index.html
3: ...
How can one use multi threading in PHP applications
...
That's nice, I have not touched PHP for years and now it's got multithreading capabilities!
– cruizer
Mar 27 '14 at 8:33
1
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What's the best way of structuring data on firebase?
I am new to firebase and I want to know what's the best way of structuring data on it.
3 Answers
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Mathematical functions in Swift
...
@noilly: kinda late now, you have to set the file type to iOS in the Playground's file properties (Cmd-Opt-0), or import UIKit instead, per above comment
– Chris Conover
Sep 29 '14 at 21:35
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