大约有 44,000 项符合查询结果（耗时：0.0748秒） [XML]
Python list subtraction operation
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quantumSoupquantumSoup
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What are C++ functors and their uses?
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1053
A functor is pretty much just a class which defines the operator(). That lets you create objects...
What's the difference between a proc and a lambda in Ruby?
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An example:
p = Proc.new {|a, b| puts a**2+b**2 } # => #<Proc:0x3c7d28@(irb):1>
p.call 1, 2 # => 5
p.call 1 # => NoMethodError: undefined method `**' for nil:NilClass
p.call 1, 2, 3 # => 5
l = lambda {|a, b| puts a**2+b**2 } # => #<Proc:0x15016c@(irb):5 (lambda)>
l.ca...
Correct Bash and shell script variable capitalization
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codeforester
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answered Mar 23 '09 at 15:53
lhunathlhunath
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When to use ' (or quote) in Lisp?
... passed to it are evaluated. This means you can write this:
(* (+ a 2)
3)
Which in turn evaluates (+ a 2), by evaluating a and 2. The value of the symbol a is looked up in the current variable binding set, and then replaced. Say a is currently bound to the value 3:
(let ((a 3))
(* (+ a 2)
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How to calculate time elapsed in bash script?
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answered Jan 17 '12 at 23:44
Daniel Kamil KozarDaniel Kamil Kozar
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Bash: Strip trailing linebreak from output
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88
One way:
wc -l < log.txt | xargs echo -n
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What's an easy way to read random line from a file in Unix command line?
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codeforester
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answered May 23 '16 at 7:01
YokaiYokai
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How to open an elevated cmd using command line for Windows?
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GuiGui
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2
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How can I print the contents of a hash in Perl?
...rominotetromino
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3
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