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Enabling auto layout in iOS 6 while remaining backwards compatible with iOS 5
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120
Autolayout can be enabled or disabled on each .storyboard or .xib file. Just select the particu...
How assignment works with Python list slice?
...two distinct operation that use very similar syntax:
1) slicing:
b = a[0:2]
This makes a copy of the slice of a and assigns it to b.
2) slice assignment:
a[0:2] = b
This replaces the slice of a with the contents of b.
Although the syntax is similar (I imagine by design!), these are two diff...
Golang: How to pad a number with zeros when printing?
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The fmt package can do this for you:
fmt.Printf("|%06d|%6d|\n", 12, 345)
Notice the 0 in %06d, that will make it a width of 6 and pad it with zeros. The second one will pad with spaces.
You can see it in action here: http://play.golang.org/p/cinDspMccp
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Single Line Nested For Loops
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172
The best source of information is the official Python tutorial on list comprehensions. List com...
Convert a row of a data frame to vector
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answered Jan 23 '13 at 16:42
Ben BolkerBen Bolker
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PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?)
... $item is still a reference to some value which is also being used by $arr[2]. So each foreach call in the second loop, which does not call by reference, replaces that value, and thus $arr[2], with the new value.
So loop 1, the value and $arr[2] become $arr[0], which is 'foo'.
Loop 2, the value and ...
How do you plot bar charts in gnuplot?
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124
Simple bar graph:
set boxwidth 0.5
set style fill solid
plot "data.dat" using 1:3:xtic(2) wi...
Operation on every pair of element in a list
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233
Check out product() in the itertools module. It does exactly what you describe.
import itert...
Is there a python equivalent of Ruby's 'rvm'?
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edited Feb 16 '16 at 11:28
answered May 11 '10 at 16:27
O...
Rails ActionMailer - format sender and recipient name/email address
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237
If you are taking user input for name and email, then unless you very carefully validate or es...