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Create singleton using GCD's dispatch_once in Objective-C
If you can target iOS 4.0 or above
10 Answers
10
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What's the difference between equal?, eql?, ===, and ==?
...things like:
case some_object
when /a regex/
# The regex matches
when 2..4
# some_object is in the range 2..4
when lambda {|x| some_crazy_custom_predicate }
# the lambda returned true
end
See my answer here for a neat example of how case+Regex can make code a lot cleaner. And of course, by pr...
AssertContains on strings in jUnit
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If you add in Hamcrest and JUnit4, you could do:
String x = "foo bar";
Assert.assertThat(x, CoreMatchers.containsString("foo"));
With some static imports, it looks a lot better:
assertThat(x, containsString("foo"));
The static imports needed would be:...
How might I find the largest number contained in a JavaScript array?
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Andy
5,53244 gold badges3838 silver badges5252 bronze badges
answered Sep 4 '09 at 14:19
Crescent FreshCrescent...
Checking if a variable is an integer
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answered Jan 4 '11 at 1:41
mportiz08mportiz08
9,3361212 gold badges3737 silver badges4242 bronze badges
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How to implement a binary tree?
...nt(str(node.v) + ' ')
self._printTree(node.r)
# 3
# 0 4
# 2 8
tree = Tree()
tree.add(3)
tree.add(4)
tree.add(0)
tree.add(8)
tree.add(2)
tree.printTree()
print(tree.find(3).v)
print(tree.find(10))
tree.deleteTree()
tree.printTree()
...
Android 4.2: back stack behaviour with nested fragments
With Android 4.2, the support library got support for nested fragments see here . I've played around with it and found an interesting behaviour / bug regarding back stack and getChildFragmentManager() . When using getChildFragmentManager() and addToBackStack(String name), by pressing the back butt...
Xcode 6 Bug: Unknown class in Interface Builder file
I upgraded to Xcode 6 beta 4 and now my App continuously crashes with the message
52 Answers
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Using sphinx with Markdown instead of RST
... Beni Cherniavsky-PaskinBeni Cherniavsky-Paskin
7,7413737 silver badges5252 bronze badges
17
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Git: Create a branch from unstaged/uncommitted changes on master
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edited Apr 2 '10 at 23:14
answered Apr 2 '10 at 22:25
Gau...