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“for” vs “each” in Ruby
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316
This is the only difference:
each:
irb> [1,2,3].each { |x| }
=> [1, 2, 3]
irb> x
N...
What's the meaning of 'origin' in 'git push origin master'
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edited Mar 11 '11 at 16:39
answered Mar 11 '11 at 8:49
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How to 'bulk update' with Django?
....models import F
Entry.objects.all().update(n_pingbacks=F('n_pingbacks') + 1)
See the documentation.
However, note that:
This won't use ModelClass.save method (so if you have some logic inside it won't be triggered).
No django signals will be emitted.
You can't perform an .update() on a slice...
Why don't C++ compilers define operator== and operator!=?
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13 Answers
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How does the “this” keyword work?
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1370
I recommend reading Mike West's article Scope in JavaScript (mirror) first. It is an excellen...
How to Set Opacity (Alpha) for View in Android
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12 Answers
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Show a PDF files in users browser via PHP/Perl
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answered Jan 13 '11 at 12:04
StephenStephen
16.4k44 gold badges2828 silver badges3030 bronze badges
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extra qualification error in C++
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211
This is because you have the following code:
class JSONDeserializer
{
Value JSONDeserializ...
Convert string[] to int[] in one line of code using LINQ
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621
Given an array you can use the Array.ConvertAll method:
int[] myInts = Array.ConvertAll(arr, s ...
How do I move a file with Ruby?
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edited May 25 '10 at 7:33
answered Dec 31 '08 at 15:46
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