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PostgreSQL: How to pass parameters from command line?
I have a somewhat detailed query in a script that uses ? placeholders. I wanted to test this same query directly from the psql command line (outside the script). I want to avoid going in and replacing all the ? with actual values, instead I'd like to pass the arguments after the query.
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Return a “NULL” object if search result not found
I'm pretty new to C++ so I tend to design with a lot of Java-isms while I'm learning. Anyway, in Java, if I had class with a 'search' method that would return an object T from a Collection< T > that matched a specific parameter, I would return that object and if the object was not found in...
Postgres dump of only parts of tables for a dev snapshot
... mytable WHERE ...) TO '/tmp/myfile.tsv'
COPY mytable FROM 'myfile.tsv'
https://www.postgresql.org/docs/current/static/sql-copy.html
You should consider maintaining a set of development data rather than just pulling a subset of your production. In the case that you're writing unit tests, you co...
What's the difference between assignment operator and copy constructor?
I don't understand the difference between assignment constructor and copy constructor in C++. It is like this:
8 Answers
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How do I create a multiline Python string with inline variables?
I am looking for a clean way to use variables within a multiline Python string. Say I wanted to do the following:
7 Answers...
Difference between setTimeout with and without quotes and parentheses
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Totally agree with Joseph.
Here is a fiddle to test this: http://jsfiddle.net/nicocube/63s2s/
In the context of the fiddle, the string argument do not work, in my opinion because the function is not defined in the global scope.
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Aren't Python strings immutable? Then why does a + “ ” + b work?
My understanding was that Python strings are immutable.
22 Answers
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Why did Rails4 drop support for “assets” group in the Gemfile
...piled and will be
served as static assets by your web server.
(Source: http://edgeguides.rubyonrails.org/asset_pipeline.html#in-production)
But many time you have to use these 'assets' gems in production... for example, if you use a js.coffee file in your views directory, then Rails needs coffe...
How do I remove the blue styling of telephone numbers on iPhone/iOS?
Is there a way to remove the default blue hyperlink colour from a telephone number when viewed on an iPhone? Like a specific Mobile Safari tag or CSS to add?
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Executing Batch File in C#
I'm trying to execute a batch file in C#, but I'm not getting any luck doing it.
12 Answers
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