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Simpler way to create dictionary of separate variables?
I would like to be able to get the name of a variable as a string but I don't know if Python has that much introspection capabilities. Something like:
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How to get URL parameter using jQuery or plain JavaScript?
I have seen lots of jQuery examples where parameter size and name are unknown.
33 Answers
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Time complexity of Euclid's Algorithm
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One trick for analyzing the time complexity of Euclid's algorithm is to follow what happens over two iterations:
a', b' := a % b, b % (a % b)
Now a and b will both decrease, instead of only one, which makes the analysis easier. Yo...
Adding two numbers concatenates them instead of calculating the sum
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Peter Mortensen
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answered Jan 24 '13 at 8:08
elclanrselclanrs
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How do I use the new computeIfAbsent function?
...oncurrentHashMap<>();
whoLetDogsOut.computeIfAbsent("snoop", k -> f(k));
whoLetDogsOut.computeIfAbsent("snoop", k -> f(k));
}
static boolean f(String s) {
System.out.println("creating a value for \""+s+'"');
return s.isEmpty();
}
}
Then you w...
Is DateTime.Now the best way to measure a function's performance?
I need to find a bottleneck and need to accurately as possible measure time.
15 Answers
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Can hash tables really be O(1)?
It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind:
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Free XML Formatting tool [closed]
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Then run: Menu Plugins, Xml Tools, Pretty Print (XML only - with line breaks)
Original answer (for older versions of Notepad++)
Notepad++ menu: TextFX -> HTML Tidy -> Tidy: Reindent XML
This feature however wraps XMLs and that makes it look 'unclean'.
To have no wrap,
open C:\Program ...
What is the scope of variables in JavaScript?
...ing and closures. This means you can tell the scope of an identifier by looking at the source code.
The four scopes are:
Global - visible by everything
Function - visible within a function (and its sub-functions and blocks)
Block - visible within a block (and its sub-blocks)
Module - visible within...
Best way to create an empty map in Java
...he latter sometimes when the compiler cannot automatically figure out what kind of Map is needed (this is called type inference). For example, consider a method declared like this:
public void foobar(Map<String, String> map){ ... }
When passing the empty Map directly to it, you have to...