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What is the difference between Gemfile and Gemfile.lock in Ruby on Rails
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The Gemfile is where you specify which gems you want to use, and lets you specify which versio...
Best way to format integer as string with leading zeros? [duplicate]
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10 Answers
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How to add new item to hash
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Create the hash:
hash = {:item1 => 1}
Add a new item to it:
hash[:item2] = 2
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Why doesn't c++ have &&= or ||= for booleans?
...alent to the logical operations, as long as both operands are of type bool.1
Contrary to what other people have said here, a bool in C++ must never have a different value such as 2. When assigning that value to a bool, it will be converted to true as per the standard.
The only way to get an invali...
Bash tool to get nth line from a file
Is there a "canonical" way of doing that? I've been using head -n | tail -1 which does the trick, but I've been wondering if there's a Bash tool that specifically extracts a line (or a range of lines) from a file.
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Can't find @Nullable inside javax.annotation.*
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You need to include a jar that this class exists in. You can find it here
If using Maven, yo...
How to stop flask application without using ctrl-c
...p.stop()" API, I am curious about how to code this. I am working on Ubuntu 12.10 and Python 2.7.3.
13 Answers
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Performance difference for control structures 'for' and 'foreach' in C#
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Well, it partly depends on the exact type of list. It will also depend on the exact CLR you're...
Booleans, conditional operators and autoboxing
...l() method affects the static typing of the expressions at compile time:
E1: `true ? returnsNull() : false` - boolean (auto-unboxing 2nd operand to boolean)
E2: `true ? null : false` - Boolean (autoboxing of 3rd operand to Boolean)
See Java Language Specification, section 15.25 Conditional Opera...
How can I change the color of pagination dots of UIPageControl?
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17 Answers
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