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What is the “right” way to iterate through an array in Ruby?
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This will iterate through all the elements:
array = [1, 2, 3, 4, 5, 6]
array.each { |x| puts x }
Prints:
1
2
3
4
5
6
This will iterate through all the elements giving you the value and the index:
array = ["A", "B", "C"]
array.each_with_index {|val, index| puts "#{val} => #{inde...
Determine the number of lines within a text file
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401
Seriously belated edit: If you're using .NET 4.0 or later
The File class has a new ReadLines ...
C++ sorting and keeping track of indexes
...aume Jacquenot
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answered Sep 13 '12 at 4:10
Łukasz WiklendtŁukasz Wiklendt
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Modifying a subset of rows in a pandas dataframe
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248
Use .loc for label based indexing:
df.loc[df.A==0, 'B'] = np.nan
The df.A==0 expression crea...
How do I get an object's unqualified (short) class name?
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184
You can do this with reflection. Specifically, you can use the ReflectionClass::getShortName met...
自动生成Linux下Makefile全攻略（automake原理） - C/C++ - 清泛网 - 专注C/C++及内核技术
...nux编译安装软件的方法的主要步骤及输出结果如下：1、. configure 输出Makefile文件2...本文假定大家对Makefile自动化编译有基本的了解（不了解的最好先熟悉下，参见《Makefile经典教程（入门必备）》），Linux编译安装软件的方法的...
How do I empty an array in JavaScript?
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4562
Ways to clear an existing array A:
Method 1
(this was my original answer to the question)
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diff to output only the file names
... John KugelmanJohn Kugelman
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SQL Server - copy stored procedures from one db to another
... Jaimal ChohanJaimal Chohan
7,98366 gold badges4040 silver badges6262 bronze badges
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Differences between Perl and PHP [closed]
...= qw(bar baz);
@qux = ('qux', @foo, 'quux'); # @qux is an array containing 4 strings
@bam = ('bug-AWWK!', \@foo, 'fum'); # @bam contains 3 elements: two strings and a array ref
PHP doesn't flatten arrays.
Perl has special code blocks (BEGIN, UNITCHECK, CHECK, INIT and END) that are executed. Unlik...