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SparseArray vs HashMap
...re 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&...
Invalid postback or callback argument. Event validation is enabled using '
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What is the difference between & vs @ and = in angularJS
...espectively.
– Samih
Oct 17 '14 at 10:35
1
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Check if property has attribute
...[])pi.GetCustomAttributes(typeof(IsIdentity), false);
if (attr.Length > 0) {
// Use attr[0], you'll need foreach on attr if MultiUse is true
}
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Handling Dialogs in WPF with MVVM
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130
I suggest forgoing the 1990's modal dialogs and instead implementing a control as an overlay (ca...
const char * const versus const char *?
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answered Feb 9 '11 at 19:05
Kent BoogaartKent Boogaart
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How to redirect to a 404 in Rails?
I'd like to 'fake' a 404 page in Rails. In PHP, I would just send a header with the error code as such:
11 Answers
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Is a Java string really immutable?
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404
String is immutable* but this only means you cannot change it using its public API.
What you ...
Detect permission of camera in iOS
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edited Oct 23 '16 at 17:04
Akhrameev
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answered Dec 9 '13 at 6:46
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How to get current foreground activity context in android?
...ce(Context.ACTIVITY_SERVICE);
ComponentName cn = am.getRunningTasks(1).get(0).topActivity;
UPDATE 2018/10/03
getRunningTasks() is DEPRECATED. see the solutions below.
This method was deprecated in API level 21.
As of Build.VERSION_CODES.LOLLIPOP, this method is no longer available to third party ...