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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
What the title says: what does it mean to encapsulate a variable in {} , "" , or "{} "? I haven't been able to find any explanations online about this - I haven't been able to refer to them except for using the symbols, which doesn't yield anything.
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How do I copy a hash in Ruby?
...lone
h1[:a] << 'bar'
p h2 # => {:a=>"foobar"}
What's happening is that the hash's references are being copied, but not the objects that the references refer to.
If you want a deep copy then:
def deep_copy(o)
Marshal.load(Marshal.dump(o))
end
h1 = {:a => 'foo'}
h2...
How to replace a hash key with another key
... I often don't like "smart" ruby code because it takes some time to tell what it is really doing. Your solution is in other hand simple and descriptive.
– Lucas
Nov 13 '14 at 18:55
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Android: Clear Activity Stack
... you are wrong. If you want to close existing activity stack regardless of what's in there and create new root, correct set of flags is the following:
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
From the doc:
public static final int FLAG_ACTIVITY_CLEAR_TA...
What is the difference between sites-enabled and sites-available directory?
What is use of these two directories in apache2 and how can we do it?
3 Answers
3
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What is the significance of ProjectTypeGuids tag in the visual studio project file
What is the significance of the ProjectTypeGuids tag in a visual studio project?? When I created a WPF application, i am seeing two GUIDs in here.
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Should unit tests be written for getter and setters?
...t practice of refactoring.
You gain this TDD or not.
Design
You specify what something should do, how it should behaves before implementing it.
This often means more informed implementation decisions.
Documentation
The test suite should serve as the specification (requirements) documentation.
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How does a language expand itself? [closed]
... computer is like an onion: cutting through it makes you cry, but it's somewhat tasty afterwards.
– alecov
Jul 29 '14 at 13:55
3
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“Unknown class in Interface Builder file” error at runtime
...t loaded at runtime. The IB compiler compiles the xib to a nib; the nib is what gets loaded at runtime.
– Peter Hosey
Nov 13 '09 at 4:12
19
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How do I render a partial of a different format in Rails?
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What's wrong with
render :partial => '/foo/baz.html.erb'
? I just tried this to render an HTML ERB partial from inside an Atom builder template and it worked fine. No messing around with global variables required (yea...