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What is the difference between -viewWillAppear: and -viewDidAppear:?
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12 Answers
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SparseArray vs HashMap
...ere is an example of SparseIntArray vs HashMap<Integer, Integer> for 1000 elements:
SparseIntArray:
class SparseIntArray {
int[] keys;
int[] values;
int size;
}
Class = 12 + 3 * 4 = 24 bytes
Array = 20 + 1000 * 4 = 4024 bytes
Total = 8,072 bytes
HashMap:
class HashMap<K, V...
What is the best way to unit test Objective-C code?
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17 Answers
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Get Element value with minidom with Python
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157
It should just be
name[0].firstChild.nodeValue
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Expansion of variables inside single quotes in a command in Bash
...mple, the following is very unsafe. DON'T DO THIS
script="echo \"Argument 1 is: $myvar\""
/bin/sh -c "$script"
If the contents of $myvar is untrusted, here is an exploit:
myvar='foo"; echo "you were hacked'
Instead of the above invocation, use positional arguments. The following invocation is ...
Get type of a generic parameter in Java with reflection
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18 Answers
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Java compile speed vs Scala compile speed
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edited May 23 '17 at 12:02
Community♦
111 silver badge
answered Aug 16 '10 at 4:07
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Are delphi variables initialized with a value by default?
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10 Answers
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When to use NSInteger vs. int
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edited Aug 3 '19 at 20:59
Dmitry
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