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What does “O(1) access time” mean?
...gardless of their size, and linked lists, which must be traversed in order from the beginning to access a given item.
The other operation usually discussed is insert. A collection can be O(1) for access but O(n) for insert. In fact an array has exactly this behavior, because to insert an item in ...
How do I determine whether an array contains a particular value in Java?
... is roughly constant. At least for arrays up to 2^30. There may be affects from, say, hardware caches which the big-O analysis ignores. Also assumes the hash function is working effectively.
– Tom Hawtin - tackline
Sep 9 '14 at 23:51
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What is the most efficient way to loop through dataframes with pandas? [duplicate]
... This is great; thanks Richard. It is still relevant with Python 3.7+. From 286 seconds with iterrows to 3.62 with zip. Thanks
– pacta_sunt_servanda
May 16 '19 at 12:48
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What is the difference between 'content' and 'text'
...ndle such responses without access to the byte stream, but it's a long way from the common case, where you just want correctly-decoded Unicode text.
– holdenweb
Nov 8 '18 at 12:12
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JSON left out Infinity and NaN; JSON status in ECMAScript?
...ethods in order to implement such a thing. Not sure where your serializing from, so I can't give details on how to implement it in the serialization methods.
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Abort Ajax requests using jQuery
...I cancel/abort an Ajax request that I have not yet received the response from?
17 Answers
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Express next function, what is it really for?
...route callback(s)." next(err) is used to jump to any "error middleware" (E from the post).
– Jonathan Lonowski
Oct 30 '12 at 7:53
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How to capture UIView to UIImage without loss of quality on retina display
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Switch from use of UIGraphicsBeginImageContext to UIGraphicsBeginImageContextWithOptions (as documented on this page). Pass 0.0 for scale (the third argument) and you'll get a context with a scale factor equal to that of the screen....
Have a reloadData for a UITableView animate when changing
...xSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationFade];
From the documentation:
Calling this method causes the table view to ask its data source for
new cells for the specified sections. The table view animates the
insertion of new cells in as it animates the old cells out...
Android: show soft keyboard automatically when focus is on an EditText
...ner on the EditText on the AlertDialog, then get the AlertDialog's Window. From there you can make the soft keyboard show by calling setSoftInputMode.
final AlertDialog dialog = ...;
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(Vi...