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How long do browsers cache HTTP 301s?
I am debugging a problem with a HTTP 301 Permanent Redirect. After a quick test, it seems that Safari clears its cache of 301s when it is restarted, but Firefox does not.
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When is it practical to use Depth-First Search (DFS) vs Breadth-First Search (BFS)? [closed]
...stand the differences between DFS and BFS, but I'm interested to know when it's more practical to use one over the other?
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How to find the 'sizeof' (a pointer pointing to an array)?
...what the pointer is pointing to. There are tricks, like ending the array with a known out-of-band value and then counting the size up until that value, but that's not using sizeof().
Another trick is the one mentioned by Zan, which is to stash the size somewhere. For example, if you're dynamica...
Java Ordered Map
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The SortedMap interface (with the implementation TreeMap) should be your friend.
The interface has the methods:
keySet() which returns a set of the keys in ascending order
values() which returns a collection of all values in the ascending order of ...
JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images
Digital camera photos are often saved as JPEG with an EXIF "orientation" tag. To display correctly, images need to be rotated/mirrored depending on which orientation is set, but browsers ignore this information rendering the image. Even in large commercial web apps, support for EXIF orientation can ...
Algorithm to generate a crossword
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I came up with a solution which probably isn't the most efficient, but it works well enough. Basically:
Sort all the words by length, descending.
Take the first word and place it on the board.
Take the next word.
Search through all th...
How to check if mod_rewrite is enabled in php?
I was wondering if it is possible to check if mod_rewrite is enabled on Apache AND IIS in PHP .
15 Answers
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How to determine the encoding of text?
...ing Python? How can I detect the encoding/codepage of a text file deals with C#.
10 Answers
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node.js database [closed]
I'm looking for a database to pair with a node.js app. I'm assuming a json/nosql db would be preferable to a relational DB [I can do without any json/sql impedance mismatch]. I'm considering:
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Find the nth occurrence of substring in a string
This seems like it should be pretty trivial, but I am new at Python and want to do it the most Pythonic way.
21 Answers
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