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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
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191
Use INSERT ... ON DUPLICATE KEY UPDATE. For example:
INSERT INTO `usage`
(`thing_id`, `times_...
Timeout command on Mac OS X?
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130
You can use
brew install coreutils
And then whenever you need timeout, use
gtimeout
..i...
How to sort a list in Scala by two fields?
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217
rows.sortBy(r => (r.lastName, r.firstName))
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How to export plots from matplotlib with transparent background?
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186
Use the matplotlib savefig function with the keyword argument transparent=True to save the ima...
数据结构与本地数据库 07：错题记录、事务与统计图 · App Inventor 2 中文网
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split string only on first instance - java
... limit n is greater than zero then the pattern will be applied at most n - 1 times, the array's length will be no greater than n, and the array's last entry will contain all input beyond the last matched delimiter.
The string boo:and:foo, for example, yields the following results with these par...
How to convert an OrderedDict into a regular dict in python3
...rt OrderedDict
>>> OrderedDict([('method', 'constant'), ('data', '1.225')])
OrderedDict([('method', 'constant'), ('data', '1.225')])
>>> dict(OrderedDict([('method', 'constant'), ('data', '1.225')]))
{'data': '1.225', 'method': 'constant'}
>>>
However, to store it in a d...
converting drawable resource image into bitmap
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edited Jan 31 '14 at 19:38
answered Jan 3 '12 at 19:14
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How do I count the number of occurrences of a char in a String?
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How to DROP multiple columns with a single ALTER TABLE statement in SQL Server?
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