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Precise Financial Calculation in JavaScript. What Are the Gotchas?
...now what mistakes to avoid when using JavaScript to do this type of math—if it is possible at all!
7 Answers
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How do I make curl ignore the proxy?
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If you don't want to override the http_proxy on a case-by-case basis, you can configure the domains to ignore with $no_proxy, and then alias your curl: alias curl='curl --noproxy $no_proxy'
– Sir4ur0n
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Export query result to .csv file in SQL Server 2008
...comma-delimited text.
To save the results of a query to a file: Ctrl + Shift + F
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Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
...oduced, which is why pandas has the tools to deal with it.
Datetimes too (if you use pd.NaT you won't need to specify the dtype)
In [24]: s = Series([Timestamp('20130101'),np.nan,Timestamp('20130102 9:30')],dtype='M8[ns]')
In [25]: s
Out[25]:
0 2013-01-01 00:00:00
1 NaT
2 2...
How do I check for a network connection?
What is the best way to determine if there is a network connection available?
4 Answers
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Mongo: find items that don't have a certain field
...e using $exists:
db.things.find( { a : { $exists : false } } ); // return if a is missing
When is true, $exists matches the documents that contain the field, including documents where the field value is null. If is false, the query returns only the documents that do not contain the field.
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How to check what user php is running as?
I need to detect if php is running as nobody. How do I do this?
16 Answers
16
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Kill a postgresql session/connection
...onnections:
REVOKE CONNECT ON DATABASE dbname FROM PUBLIC, username;
If you're using Postgres 8.4-9.1 use procpid instead of pid
SELECT
pg_terminate_backend(procpid)
FROM
pg_stat_activity
WHERE
-- don't kill my own connection!
procpid <> pg_backend_pid()
-- don...
How to make a class JSON serializable
... "/foo/bar"}'
In that case you can merely call json.dumps(f.__dict__).
If you want more customized output then you will have to subclass JSONEncoder and implement your own custom serialization.
For a trivial example, see below.
>>> from json import JSONEncoder
>>> class MyEn...
Replace Line Breaks in a String C#
...lacement text"); //add a line terminating ;
As mentioned in other posts, if the string comes from another environment (OS) then you'd need to replace that particular environments implementation of new line control characters.
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