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Ruby arrays: %w vs %W
... (no variable interpolation, fewer escape sequences), while %W quotes like double quotes "".
irb(main):001:0> foo="hello"
=> "hello"
irb(main):002:0> %W(foo bar baz #{foo})
=> ["foo", "bar", "baz", "hello"]
irb(main):003:0> %w(foo bar baz #{foo})
=> ["foo", "bar", "baz", "\#{foo}"...
How do you attach a new pull request to an existing issue on github?
...ecently and it didn't work -- it just created a brand new issue instead. I don't see any options like "Attach to issue" on the new pull request page, nor "Open a new pull request for this issue" on the issue page. Is there any way to do this, to help project owners keep their Issues page clean and a...
How do you create a hidden div that doesn't create a line break or horizontal space?
I want to have a hidden checkbox that doesn't take up any space on the screen.
10 Answers
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Oracle: how to UPSERT (update or insert into a table?)
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The issue is that you have a window in between the insert and the update where another process could successfully fire a delete. I did however use this pattern on a table that never has deletes fired against it.
– chotchki
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Why always ./configure; make; make install; as 3 separate steps?
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Because each step does different things
Prepare(setup) environment for building
./configure
This script has lots of options that you should change. Like --prefix or --with-dir=/foo. That means every system has a different configuration. Al...
How do I find Waldo with Mathematica?
...bugging me over the weekend: What is a good way to solve those Where's Waldo? [ 'Wally' outside of North America] puzzles, using Mathematica (image-processing and other functionality)?
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How to set Python's default version to 3.x on OS X?
I'm running Mountain Lion and the basic default Python version is 2.7. I downloaded Python 3.3 and want to set it as default.
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How do I get the list of keys in a Dictionary?
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Marc, yes so in that case you'd do something like the other answer and create a new list.
– Martin Capodici
Mar 10 '16 at 23:01
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How to align input forms in HTML
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This solution does not appear to work. The input elements are not left-aligned. The table solution below works.
– johny why
Jan 24 '14 at 18:18
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JVM option -Xss - What does it do exactly?
It says here that -Xss is used to "set thread stack size", what does it mean exactly? Could anyone help me understand this?
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