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how to append a list object to another
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Move window between tmux clients
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postgresql: INSERT INTO … (SELECT * …)
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Why is list initialization (using curly braces) better than the alternatives?
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SQL Server: Filter output of sp_who2
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based on http://web.archive.org/web/20080218124946/http://sqlserver2005.databases.aspfaq.com/how-do-i-mimic-sp-who2.html
i have created following script , which resolves finding active connections to any datbase using DMV this works ...
Sort array of objects by single key with date value
...j = _.sortBy(arrObj,"updated_at");
_.sortBy() returns a new array
refer http://underscorejs.org/#sortBy and
lodash docs https://lodash.com/docs#sortBy
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Format numbers to strings in Python
... tax: $14.07'
>>> d = {'web': 'user', 'page': 42}
>>> 'http://xxx.yyy.zzz/%(web)s/%(page)d.html' % d
'http://xxx.yyy.zzz/user/42.html'
Here are the equivalent snippets but using str.format():
>>> "Name: {0}, age: {1}".format('John', 35)
'Name: John, age: 35'
>&...
Allow user to set up an SSH tunnel, but nothing else
...or\r\n"
while [ true ] ; do
sleep 1000
done
exit 0
Fully explained here: http://blog.flowl.info/2011/ssh-tunnel-group-only-and-no-shell-please/
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iPhone Simulator - Simulate a slow connection?
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An app called SpeedLimit
https://github.com/mschrag/speedlimit
Works great.
chris.
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follow
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Add unique constraint to combination of two columns
... to insert the row and returning an exception (exceptions are expensive).
http://www.sqlperformance.com/2012/08/t-sql-queries/error-handling
http://www.mssqltips.com/sqlservertip/2632/checking-for-potential-constraint-violations-before-entering-sql-server-try-and-catch-logic/
If you want to preve...