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Any reason not to use '+' to concatenate two strings?
...te a new string object for each iteration, and it ends up taking quadratic time. (Recent versions of CPython can apparently optimize this in some cases, but other implementations can't, so programmers are discouraged from relying on this.) ''.join is the right way to do this.
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How to calculate “time ago” in Java?
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Take a look at the PrettyTime library.
It's quite simple to use:
import org.ocpsoft.prettytime.PrettyTime;
PrettyTime p = new PrettyTime();
System.out.println(p.format(new Date()));
// prints "moments ago"
You can also pass in a locale for inter...
best way to preserve numpy arrays on disk
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I've compared performance (space and time) for a number of ways to store numpy arrays. Few of them support multiple arrays per file, but perhaps it's useful anyway.
Npy and binary files are both really fast and small for dense data. If the data is sparse or v...
Given a DateTime object, how do I get an ISO 8601 date in string format?
...rst suggestion). Refer to the comments section for more information.
DateTime.UtcNow.ToString("yyyy-MM-ddTHH\\:mm\\:ss.fffffffzzz");
This gives you a date similar to 2008-09-22T13:57:31.2311892-04:00.
Another way is:
DateTime.UtcNow.ToString("o");
which gives you 2008-09-22T14:01:54.9571247Z...
php execute a background process
...e to be able to perform such an action without the user being aware of the time it takes for the copy to complete.
18 Answe...
Repeat String - Javascript
...most concise method for returning a string repeated an arbitrary amount of times?
30 Answers
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Concatenating two lists - difference between '+=' and extend()
...uld be worrying about, unless you're performing this operation billions of times. It is likely, however, that the bottleneck would lie some place else.
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How to match “any character” in regular expression?
...har
\. = the actual dot character
.? = .{0,1} = match any char zero or one times
.* = .{0,} = match any char zero or more times
.+ = .{1,} = match any char one or more times
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Write a function that returns the longest palindrome in a given string
I thought of a solution but it runs in O(n^2) time
22 Answers
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__FILE__ macro shows full path
... with both source and header files, is very efficient and works on compile time in all platforms without compiler-specific extensions. This solution also preserves the relative directory structure of your project, so you know in which folder the file is in, and only relative to the root of your proj...