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Python initializing a list of lists [duplicate]
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The problem is that they're all the same exact list in memory. When you use the [x]*n syntax, what you get is a list of n many x objects, but they're all references to the same object. They're not distinct instances, rather, just n references to the sam...
How to trace the path in a Breadth-First Search?
... found
if node == end:
return path
# enumerate all adjacent nodes, construct a new path and push it into the queue
for adjacent in graph.get(node, []):
new_path = list(path)
new_path.append(adjacent)
queue.append(new_path)
prin...
How do you check if a variable is an array in JavaScript? [duplicate]
...structor === Array
This is the fastest method on Chrome, and most likely all other browsers. All arrays are objects, so checking the constructor property is a fast process for JavaScript engines.
If you are having issues with finding out if an objects property is an array, you must first check if...
Design Patterns: Factory vs Factory method vs Abstract Factory
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All three Factory types do the same thing: They are a "smart constructor".
Let's say you want to be able to create two kinds of Fruit: Apple and Orange.
Factory
Factory is "fixed", in that you have just one implementation ...
How do I trigger the success callback on a model.save()?
...is correctly posted to the server which handles the save, but the success callback is not fired. Do I need to send something back from the server ?
...
Scala list concatenation, ::: vs ++
...matic Scala 2.10 has :+ and +: object extractors.
– 0__
Jan 18 '13 at 9:25
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show 6 more comments
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How to format current time using a yyyyMMddHHmmss format?
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acturally the golang format is very strange. why not use the yyyymmddHHiiss style , but use the ""2006/01/02/15/04/05", I have not get it the real reason
– Kewin
May 10 '16 at 14:32
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UITextField - capture return button event
...terPressed), for: .editingDidEndOnExit)
}
in enterPressed() function put all behaviours you're after
func enterPressed(){
//do something with typed text if needed
textField.resignFirstResponder()
}
share
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How do I perform HTML decoding/encoding using Python/Django?
... appropriate for strings encoded with django.utils.html.escape. More generally, it is a good idea to stick with the standard library:
# Python 2.x:
import HTMLParser
html_parser = HTMLParser.HTMLParser()
unescaped = html_parser.unescape(my_string)
# Python 3.x:
import html.parser
html_parser = ht...
Entity Framework: How to disable lazy loading for specific query?
...ed Aug 14 '15 at 14:13
William BallesterosWilliam Ballesteros
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