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Preferred method to store PHP arrays (json_encode vs serialize)
..."5.3.0 Added the optional depth. The default recursion depth was increased from 128 to 512"
– giorgio79
Dec 15 '11 at 6:30
4
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The Ruby %r{ } expression
... variant ignores whitespace, making complex regexps more readable. Example from GitHub's Ruby style guide:
regexp = %r{
start # some text
\s # white space char
(group) # first group
(?:alt1|alt2) # some alternation
end
}x
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Ruby Metaprogramming: dynamic instance variable names
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You can also use send which prevents the user from setting non-existent instance variables:
def initialize(hash)
hash.each { |key, value| send("#{key}=", value) }
end
Use send when in your class there is a setter like attr_accessor for your instance variables:
clas...
npm failed to install time with make not found error
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Thanks a lot, after more than 2 years from this post. It saved my day !!
– Kousick Shanmugam Nagaraj
Nov 7 '17 at 17:58
1
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Is there a regular expression to detect a valid regular expression?
...t;)|\)(?<-N>))(?:(?:[?+*]|\{\d+(?:,\d*)?\})[?+]?)?|\|)*$(?(N)(?!))
From the comments:
Will this validate substitutions and translations?
It will validate just the regex part of substitutions and translations. s/<this part>/.../
It is not theoretically possible to match all va...
Rails 4: before_filter vs. before_action
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In 4.2 They are not deprecating it, but removing it from the docs since it is discouraged. edgeguides.rubyonrails.org/…
– onetwopunch
Dec 3 '14 at 23:18
17...
Passing a list of kwargs?
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The ** unpacking operator can be used to pass kwargs from one function to another function's kwargs. Consider this code: (newlines don't seem to be allowed in comments) def a(**kw): print(kw), and def b(**kw): a(kw). This code will generate an error because kwargs is actually a...
How to access object attribute given string corresponding to name of that attribute
...ed to set and get the attribute of an class.
A brief example:
>>> from new import classobj
>>> obj = classobj('Test', (object,), {'attr1': int, 'attr2': int}) # Just created a class
>>> setattr(obj, 'attr1', 10)
>>> setattr(obj, 'attr2', 20)
>>> geta...
What are the differences between PMD and FindBugs?
... Rules, bundled with a Rule Designer to let you easily construct new rules from code samples (similar to RegEx and XPath GUI builders). FindBugs is stronger out of the box, but constructing project specific rules and patterns is very important.
For example, I encountered a performance problem invol...
Creating PHP class instance with a string
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have a look at example 3 from http://www.php.net/manual/en/language.oop5.basic.php
$className = 'Foo';
$instance = new $className(); // Foo()
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