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How do I update pip itself from inside my virtual environment?
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This is now what pip itself recommends, if it detects a newer version of itself.
– tephyr
May 29 '16 at 21:51
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Suppress/ print without b' prefix for bytes in Python 3
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If the bytes use an appropriate character encoding already; you could print them directly:
sys.stdout.buffer.write(data)
or
nwritten = os.write(sys.stdout.fileno(), data) # NOTE: it may write less than len(data) bytes
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Javascript: Round up to the next multiple of 5
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I arrived here while searching for something similar.
If my number is —0, —1, —2 it should floor to —0, and if it's —3, —4, —5 it should ceil to —5.
I came up with this solution:
function round(x) { return x%5<3 ? (x%5===0 ? x : Math.floor(x/5)*5) : Math.cei...
Longest line in a file
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@Thomas. Expressing it as a pipe is more general than specifying a file as an option. In my case, I'll be using output piped from a database query.
– Andrew Prock
Oct 31 '09 at 23:31
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How to get Erlang's release version number from a shell?
...E" doesn't see it either, but I have OTP 17.x installed. How am I able to know what "x" is?
– NobbZ
Apr 21 '15 at 14:30
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python pandas dataframe to dictionary
...for to_dict. You can use it like this:
df.set_index('id').to_dict()
And if you have only one column, to avoid the column name is also a level in the dict (actually, in this case you use the Series.to_dict()):
df.set_index('id')['value'].to_dict()
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如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...e用户的SQL执行历史记录？select * from v$sqlarea t order by t LAST_ACTIVE_TIME desc注意 ：执行此语句等等一些相关的语句 必须具有DBA 的权限 虽然
select * from v$sqlarea t order by t.LAST_ACTIVE_TIME desc
注意 ：执行此语句等等一些相关的语句 必...
Showing empty view when ListView is empty
... any idea how to do that in app inventor?
– JinSnow
Mar 26 '15 at 16:56
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PHP and MySQL - how to avoid password in source code? [duplicate]
...stead of the contents) or b) Move it outside of your web served directory. If somebody can see your configuration file, it's worse than having it in your source code.
It's also going to be a good idea to have a base (empty / default) version of the configuration file, and separate it out per enviro...
How to add 'ON DELETE CASCADE' in ALTER TABLE statement
...d try your above command, put add constraint instead of modify constraint.
Now this is the command:
ALTER TABLE child_table_name
ADD CONSTRAINT fk_name
FOREIGN KEY (child_column_name)
REFERENCES parent_table_name(parent_column_name)
ON DELETE CASCADE;
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