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How to add a filter class in Spring Boot?
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answered Jun 5 '15 at 5:09
Haim RamanHaim Raman
9,74055 gold badges3434 silver badges5858 bronze badges
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Convert SQLITE SQL dump file to POSTGRESQL
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101
You should be able to feed that dump file straight into psql:
/path/to/psql -d database -U user...
How does a hash table work?
...n the library. The output of the hash calculation could be in the range of 0 to one billion which is a lot higher.
So, what do we do? We use something called modulus calculation, which basically says that if you counted to the number you wanted (i.e. the one billion number) but wanted to stay insid...
How to erase the file contents of text file in Python?
...if you have already an opened file:
f = open('file.txt', 'r+')
f.truncate(0) # need '0' when using r+
In C++, you could use something similar.
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How to change the background color of a UIButton while it's highlighted?
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30 Answers
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SQLite UPSERT / UPDATE OR INSERT
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This is a late answer. Starting from SQLIte 3.24.0, released on June 4, 2018, there is finally a support for UPSERT clause following PostgreSQL syntax.
INSERT INTO players (user_name, age)
VALUES('steven', 32)
ON CONFLICT(user_name)
DO UPDATE SET age=excluded.age;
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Getting the last argument passed to a shell script
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answered Dec 6 '09 at 0:16
Laurence GonsalvesLaurence Gonsalves
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OSX - How to auto Close Terminal window after the “exit” command executed.
...or me
– Frankenmint
Dec 26 '15 at 3:08
Obvious and clean, perfect.
– aydinugur
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How to display pandas DataFrame of floats using a format string for columns?
... '${:,.2f}'.format
df = pd.DataFrame([123.4567, 234.5678, 345.6789, 456.7890],
index=['foo','bar','baz','quux'],
columns=['cost'])
print(df)
yields
cost
foo $123.46
bar $234.57
baz $345.68
quux $456.79
but this only works if you want every float to...
How to format a JavaScript date
In JavaScript, how can I format a date object to print as 10-Aug-2010 ?
57 Answers
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