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sed: print only matching group
...regexp-extended` option otherwise I was getting invalid reference \1 on s' command's RHS ` error.
– Daniel Sokolowski
Aug 11 '14 at 16:11
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I need a Nodejs scheduler that allows for tasks at different intervals [closed]
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I would recommend node-cron. It allows to run tasks using Cron patterns e.g.
'* * * * * *' - runs every second
'*/5 * * * * *' - runs every 5 seconds
'10,20,30 * * * * *' - run at 10th, 20th and 30th second of every minute
'0 * * * * ...
SQL query to find record with ID not in another table
...Not In" since this method has a limited number of values cf : dba-oracle.com/t_maximum_number_of_sql_in_list_values.htm
– G.Busato
Feb 19 '18 at 11:04
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Is there a way to suppress JSHint warning for one given line?
...be linted with JSHint.
You can also ignore a single line with a trailing comment like this:
ignoreThis(); // jshint ignore:line
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Can you use an alias in the WHERE clause in mysql?
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is of a type that is invalid for use as a key column in an index
...are not included in the limit on maximum index row size. technet.microsoft.com/en-us/library/ms176089(v=sql.100).aspx
– Daniel Renshaw
May 15 '14 at 11:50
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How do I format a number with commas in T-SQL?
I'm running some administrative queries and compiling results from sp_spaceused in SQL Server 2008 to look at data/index space ratios of some tables in my database. Of course I am getting all sorts of large numbers in the results and my eyes are starting to gloss over. It would be really conveni...
Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
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git hash-object -t tree /dev/null
Or, as Ciro Santilli proposes in the comments:
printf '' | git hash-object --stdin -t tree
Or, as seen here, from Colin Schimmelfing:
git hash-object -t tree --stdin < /dev/null
So I guess it is safer to define a variable with the result of that command...
Maven and adding JARs to system scope
... I've seen that article but I hoped not to do maven install on every computer where I want to build that project (unfortunately I not found this JAR in repos). Thanks! :)
– efpies
Jun 7 '12 at 15:51
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What are the differences between Helper and Utility classes?
...are many naming styles to use. I would suggest Utils just because its more common.
A Utility class is understood to only have static methods and be stateless. You would not create an instance of such a class.
A Helper can be a utility class or it can be stateful or require an instance be created. ...