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How to check if a number is a power of 2
...t:
((4 & (4-1)) == 0)
This translates to this of course:
((4 & 3) == 0)
But what exactly is 4&3?
The binary representation of 4 is 100 and the binary representation of 3 is 011 (remember the & takes the binary representation of these numbers). So we have:
100 = 4
011 = 3
I...
Warning: The Copy Bundle Resources build phase contains this target's Info.plist file
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@hasan83, you will get the build warning, and the built product will contain an extra copy of Info.plist taking up a little space.
– JWWalker
Jan 16 '15 at 1:01
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Xcode 6: Keyboard does not show up in simulator
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13 Answers
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Is calculating an MD5 hash less CPU intensive than SHA family functions?
...On my Intel x86 (Core2 Quad Q6600, 2.4 GHz, using one core), I get this in 32-bit mode:
MD5 411
SHA-1 218
SHA-256 118
SHA-512 46
and this in 64-bit mode:
MD5 407
SHA-1 312
SHA-256 148
SHA-512 189
Figures are in megabytes per second, for a "long" message (this is wh...
C#/Linq: Apply a mapping function to each element in an IEnumerable?
...n method:
IEnumerable<int> integers = new List<int>() { 1, 2, 3, 4, 5 };
IEnumerable<string> strings = integers.Select(i => i.ToString());
Or in LINQ syntax:
IEnumerable<int> integers = new List<int>() { 1, 2, 3, 4, 5 };
var strings = from i in integers
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Circular (or cyclic) imports in Python
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edited Jun 15 '12 at 15:39
Martijn Pieters♦
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What is the difference between a .xib file and a .storyboard?
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Francisco Corrales Morales
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answered Dec 8 '11 at 19:33
Sagar HatekarSagar...
Ineligible Devices section appeared in Xcode 6.x.x
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32 Answers
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What is the “__v” field in Mongoose
I'm using Mongoose version 3 with MongoDB version 2.2. I've noticed a __v field has started appearing in my MongoDB documents. Is it something to do with versioning? How is it used?
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