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Python List vs. Array - when to use?
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Lists are faster, because operations on array "raw" data need to continuously create and destroy python objects when reading from or writing to the array.
– tzot
Oct 6 '08 at 21:37
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Xcode 4.2 debug doesn't symbolicate stack call
...handlers, it can be only one way to go.
When app crashes, and you get your raw first throw call stack (in hex numbers), type into Xcode console info line *hex (don't forget star and 0x hex specifier), for example:
(gdb) info line *0x2658
Line 15 of "path/to/file/main.m" starts at address 0x25f2 <...
Can I hide the HTML5 number input’s spin box?
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The letter "E" can still be keyed in, weird.
– addy_sk
Jul 16 at 13:08
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Best way to parse RSS/Atom feeds with PHP [closed]
...bove it. On a related note, you did not start your sentence with a capital letter. ;)
– Brian Cline
Jul 27 '10 at 3:51
4
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How to test if list element exists?
...omparison of the proposed methods in other answers.
> foo <- sapply(letters, function(x){runif(5)}, simplify = FALSE)
> microbenchmark::microbenchmark('k' %in% names(foo),
is.null(foo[['k']]),
exists('k', where = foo))
Uni...
How to jump to a particular line in a huge text file?
...ell(). In text mode on windows, the line will be a byte shorter than it's raw length on disk (\r\n replaced by \n)
– Brian
Mar 6 '09 at 22:25
2
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How to convert a PIL Image into a numpy array?
...image implements the __array_interface__ which numpy can use to access the raw bytes of an image without having to pass through an iterator (see github.com/python-pillow/Pillow/blob/… and docs.scipy.org/doc/numpy/reference/arrays.interface.html). You can even just use numpy.array(PIL.Image.open('t...
HTML Form: Select-Option vs Datalist-Option
...does give one nice, new piece of information, namely that typing the first letter will select corresponding items in the list.
– james.garriss
Jan 20 '15 at 23:01
add a commen...
Java: Date from unix timestamp
...merica/Montreal, Africa/Casablanca, or Pacific/Auckland. Never use the 3-4 letter abbreviation such as EST or IST or IRST as they are not true time zones, not standardized, and not even unique(!).
If you want to see your moment through the lens of a particular region's time zone, apply a ZoneId to...
Removing all non-numeric characters from string in Python
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'123456'
There are several constants in the module, including:
ascii_letters (abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ)
hexdigits (0123456789abcdefABCDEF)
If you are using these constants heavily, it can be worthwhile to covert them to a frozenset. That enables O(1) lookups, rath...