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Check that Field Exists with MongoDB
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edited Jun 3 '16 at 9:13
answered Nov 8 '13 at 20:34
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Difference between Pragma and Cache-Control headers?
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3 Answers
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Floating point vs integer calculations on modern hardware
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35
Alas, I can only give you an "it depends" answer...
From my experience, there are many, many v...
Rails 2.3-style plugins and deprecation warnings running task in Heroku
I'm upgrading to Rails 3.2, and running rake db:migrate gives me several errors of the form:
8 Answers
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List distinct values in a vector in R
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Do you mean unique:
R> x = c(1,1,2,3,4,4,4)
R> x
[1] 1 1 2 3 4 4 4
R> unique(x)
[1] 1 2 3 4
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Unable to access JSON property with “-” dash
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Regex exactly n OR m times
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Mark ByersMark Byers
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Do Swift-based applications work on OS X 10.9/iOS 7 and lower?
...troller = UIViewController()
var view = UIView(frame: CGRectMake(0, 0, 320, 568))
view.backgroundColor = UIColor.redColor()
controller.view = view
var label = UILabel(frame: CGRectMake(0, 0, 200, 21))
label.center = CGPointMake(160, 284)
label.textAlignment = NSTextAlignment...
When is an interface with a default method initialized?
...pot) differs from what's specified here. In particular, the Example 12.4.1-3 from this section covers interface initialization. The example as follows:
interface I {
int i = 1, ii = Test.out("ii", 2);
}
interface J extends I {
int j = Test.out("j", 3), jj = Test.out("jj", 4);
}
interface K ...
SQL multiple column ordering
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1063
ORDER BY column1 DESC, column2
This sorts everything by column1 (descending) first, and then b...