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Read input from console in Ruby?
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230
Are you talking about gets?
puts "Enter A"
a = gets.chomp
puts "Enter B"
b = gets.chomp
c = a...
How do I rename a column in a database table using SQL?
...statement:
=> SELECT * FROM Test1;
id | foo | bar
----+-----+-----
2 | 1 | 2
=> ALTER TABLE Test1 RENAME COLUMN foo TO baz;
ALTER TABLE
=> SELECT * FROM Test1;
id | baz | bar
----+-----+-----
2 | 1 | 2
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C/C++ check if one bit is set in, i.e. int variable
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21 Answers
21
Active
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How do I tar a directory of files and folders without including the directory itself?
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238
cd my_directory/ && tar -zcvf ../my_dir.tgz . && cd -
should do the job in ...
Why modelVersion of pom.xml is necessary and always set to 4.0.0?
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It is always set to 4.0.0 in Maven 2 and 3, because, at present, there is no other model.
Notice that modelVersion contains 4.0.0. That is currently the only supported POM version, and is always required. [source]
But it wouldn't necessarily need to alwa...
PostgreSQL disable more output
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251
To disable pagination but retain the output, use:
\pset pager off
To remember this setting,...
How to include view/partial specific styling in AngularJS
...The repo is located here. Feel free to check it out for more info.
UPDATE 2: This answer is great if all you need is a lightweight solution for pulling in stylesheets for your routes. If you want a more complete solution for managing on-demand stylesheets throughout your application, you may want t...
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
... // try several threshold levels
const int threshold_level = 2;
for (int l = 0; l < threshold_level; l++)
{
// Use Canny instead of zero threshold level!
// Canny helps to catch squares with gradient shading
if (l == 0)
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Remove local git tags that are no longer on the remote repository
...at returns a list of hashes and friendly tag names, like:
94bf6de8315d9a7b22385e86e1f5add9183bcb3c refs/tags/v0.1.3
cc047da6604bdd9a0e5ecbba3375ba6f09eed09d refs/tags/v0.1.4
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2f2e45bedf67dedb8d1dc0d02612345ee5c893f2 refs/tags/v0.5.4
You could certainly put together a bash ...
How do I scroll to an element within an overflowed Div?
I have 20 list items inside of a div that can only show 5 at a time. What is a good way to scroll to item #10, and then item #20? I know the height of all the items.
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