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Swift: Testing optionals for nil
I'm using Xcode 6 Beta 4. I have this weird situation where I cannot figure out how to appropriately test for optionals.
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How to export DataTable to Excel
... Julien N
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answered Nov 21 '11 at 15:54
hmqcnoesyhmqcnoesy
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Merge (with squash) all changes from another branch as a single commit
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edited Dec 31 '17 at 2:48
Ioannis Filippidis
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Difference between “@id/” and “@+id/” in Android
... blahdiblah
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answered Feb 17 '11 at 7:00
Aman AlamAman Alam
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?? Coalesce for empty string?
...Copsey
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How do I make a redirect in PHP?
... use die() or exit(): The Daily WTF
Absolute or relative URL
Since June 2014 both absolute and relative URLs can be used. See RFC 7231 which had replaced the old RFC 2616, where only absolute URLs were allowed.
Status Codes
PHP's "Location"-header still uses the HTTP 302-redirect code, this is a "te...
Python: Check if one dictionary is a subset of another larger dictionary
...Python 2.7.
– Chad
Mar 29 '16 at 21:47
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i don't think optimisation should be left to the reader...
Android: Go back to previous activity
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Android activities are stored in the activity stack. Going back to a previous activity could m...
Converting datetime.date to UTC timestamp in Python
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If d = date(2011, 1, 1) is in UTC:
>>> from datetime import datetime, date
>>&...
Postgres: INSERT if does not exist already
...ONFLICT DO NOTHING RETURNING id, then read this answer stackoverflow.com/a/42217872/368691.
– Gajus
Oct 22 '18 at 15:57
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