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Why shouldn't I use “Hungarian Notation”?
...ame with its kind (using Joel's example: safe string or unsafe string), so called Apps Hungarian has its uses and is still valuable.
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edited Sep 26 '08 at 19:56
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Why is the time complexity of both DFS and BFS O( V + E )
...ice
once as UNEXPLORED
once as DISCOVERY or BACK
Method incidentEdges is called once for each vertex
DFS runs in O(n + m) time provided the graph is represented by the adjacency list structure
Recall that Σv deg(v) = 2m
BFS(analysis):
Setting/getting a vertex/edge label takes O(1) time
Each v...
Java ArrayList how to add elements at the beginning
I need to add elements to an ArrayList queue whatever, but when I call the function to add an element, I want it to add the element at the beginning of the array (so it has the lowest index) and if the array has 10 elements adding a new results in deleting the oldest element (the one with the high...
Search all the occurrences of a string in the entire project in Android Studio
...Also in IDEA 13 there is an awesome "Search Everywhere" option, by default called by double Shift. It allows you to search in project, files, classes, settings, and so on.
Also you can search from Project Structure dialog with "Find in Path…". Just call it by right mouse button on concrete direct...
How to create module-wide variables in Python? [duplicate]
...to make a module-global variable is just assign to a name.
Imagine a file called foo.py, containing this single line:
X = 1
Now imagine you import it.
import foo
print(foo.X) # prints 1
However, let's suppose you want to use one of your module-scope variables as a global inside a function, a...
What is a elegant way in Ruby to tell if a variable is a Hash or an Array?
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@juan2raid: If order is important, then call sort on it first.
– Andrew Grimm
Mar 20 '11 at 22:33
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How do you round to 1 decimal place in Javascript?
...etimes toFixed() has glitches - I have seen it in a Chrome browser where I call toFixed(), then convert to a string, and it shows something like 10.00000000068 - weird. Cannot reproduce this reliably though.
– Hamish Grubijan
Apr 25 '13 at 21:45
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Copy to clipboard in Node.js?
... many of the other answer mentioned, to copy and paste in node you need to call out to an external program. In the case of node-copy-paste, it calls out to pbcopy/pbpaste (for OSX), xclip (for linux), and clip (for windows).
This module was very helpful when I was doing a lot of work in the REPL f...
Converting a UNIX Timestamp to Formatted Date String
...tes is via the native DateTime class. To get the current time you can just call
$currentTime = new DateTime();
To create a DateTime object from a specific timestamp (i.e. not now)
$currentTime = DateTime::createFromFormat( 'U', $timestamp );
To get a formatted string you can then call
$format...
How to convert vector to array
...u need a pointer to the first element of an array, or an array?
If you're calling an API function that expects the former, you can do do_something(&v[0], v.size()), where v is a vector of doubles. The elements of a vector are contiguous.
Otherwise, you just have to copy each element:
double a...