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Java: splitting a comma-separated string but ignoring commas in quotes
...otedString'
" )* "+ // end group 1 and repeat it zero or more times
" %s* "+ // match 'otherThanQuote'
" $ "+ // match the end of the string
") ...
PHP Multidimensional Array Searching (Find key by specific value)
I have this multidimensional array. I need to search it and return only the key that matches the value of the "slug". I know there are other threads about searching multidimensional arrays, but I'm not really understanding enough to apply to my situation. Thanks very much for any help!
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Ruby: How to iterate over a range, but in set increments?
... It's an extension of the philosophy that every thing is an object and every action is a method call. So rather than using a built-in for looping with for, you should use the each method.
– Darth Egregious
Aug 13 '18 at 15:13
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Selecting/excluding sets of columns in pandas [duplicate]
...passed as argument removed.
Here, the result is used to remove columns B and D from df:
df2 = df[df.columns.difference(['B', 'D'])]
Note that it's a set-based method, so duplicate column names will cause issues, and the column order may be changed.
Advantage over drop: you don't create a cop...
List columns with indexes in PostgreSQL
... uk_test3c unique (c),constraint uk_test3ab unique (a, b));
List indexes and columns indexed:
select
t.relname as table_name,
i.relname as index_name,
a.attname as column_name
from
pg_class t,
pg_class i,
pg_index ix,
pg_attribute a
where
t.oid = ix.indrelid
an...
Bitwise operation and usage
...ators that work on multi-bit values, but conceptually one bit at a time.
AND is 1 only if both of its inputs are 1, otherwise it's 0.
OR is 1 if one or both of its inputs are 1, otherwise it's 0.
XOR is 1 only if exactly one of its inputs are 1, otherwise it's 0.
NOT is 1 only if its input is 0, o...
How to find the 'sizeof' (a pointer pointing to an array)?
...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 dynamically allocating the a...
Can I define a class name on paragraph using Markdown?
...values with Markdown Extra through.
You can use regular HTML if you like, and add the attribute markdown="1" to continue markdown-conversion within the HTML element. This requires Markdown Extra though.
<p class='specialParagraph' markdown='1'>
**Another paragraph** which allows *Markdown* w...
What is the optimal Jewish toenail cutting algorithm?
...automatically trim toenails, so that users can simply put their feet in it and run it instead of having to manually do it by biting them or using nail clippers.
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How do I list all files of a directory?
How can I list all files of a directory in Python and add them to a list ?
21 Answers
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