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onCreateOptionsMenu inside Fragments
I have placed setHasOptionsMenu(true) inside onCreateView , but I still can't call onCreateOptionsMenu inside fragments.
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Big O, how do you calculate/approximate it?
...n't a moron, its average case complexity is O(n log n) and it uses a pivot selection strategy that reduces the odds of hitting the O(n²) case). And both bsearch and qsort can be worse if the comparator function is pathological.
– ShadowRanger
Mar 21 '19 at 14:...
In which order do CSS stylesheets override?
...REC-CSS2-20110607/cascade.html#cascade
In short: more specific rules override more general ones. Specificity is defined based on how many IDs, classes, and element names are involved, as well as whether the !important declaration was used. When multiple rules of the same "specificity level" exist, ...
find() with nil when there are no records
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Yes, just do:
Challenge.find_by_id(10)
For Rails 4 and 5:
Challenge.find_by(id: 10)
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PHP - find entry by object property from an array of objects
...this
$item = null;
foreach($array as $struct) {
if ($v == $struct->ID) {
$item = $struct;
break;
}
}
See this question and subsequent answers for more information on the latter - Reference PHP array by multiple indexes
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Set element focus in angular way
...vice
.factory('focus', function($timeout, $window) {
return function(id) {
// timeout makes sure that it is invoked after any other event has been triggered.
// e.g. click events that need to run before the focus or
// inputs elements that are in a disabled state but are enab...
How to validate an OAuth 2.0 access token for a resource server?
...protected resource with an OAuth 2.0 access token, how does this server validate the token? The OAuth 2.0 refresh token protocol?
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Difference between filter and filter_by in SQLAlchemy
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Be careful when using .filter. a query like id=12345, query(users).filter(id == id) will not filter on users.id. Instead, it will evaluate id == id as True and return all users. You need to use .filter(users.id == id) (as demoed above). I made this mistake earlier toda...
What are best practices for REST nested resources?
As far as I can tell each individual resource should have only one canonical path. So in the following example what would good URL patterns be?
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Draw in Canvas by finger, Android
... Activity {
DrawingView dv ;
private Paint mPaint;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
dv = new DrawingView(this);
setContentView(dv);
mPaint = new Paint();
mPaint.setAntiAlia...