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Difference between \A \z and ^ $ in Ruby regular expressions
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If you're depending on the regular expression for validation, you always want to use \A and \z. ^ and $ will only match up until a newline character, which means they could use an email like me@example.com\n<script>dangerous_stuff();</script> and still have it valid...
What does && mean in void *p = &&abc;
I came across a piece of code void *p = &&abc; . What is the significance of && here?
I know about rvalue references but I think && used in this context is different. What does && indicate in void *p = &&abc; ?
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How can I access a JavaScript object which has spaces in the object's key?
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Use ECMAscripts "bracket notation":
myTextOptions[ 'character names' ].kid;
You can use that notation either way, reading & writting.
For more information read out here:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects
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Why Collections.sort uses merge sort instead of quicksort?
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Highly likely from Josh Bloch §:
I did write these methods, so I suppose I'm qualified to answer. It is
true that there is no single best sorting algorithm. QuickSort has
two major deficiencies when compared to mergesort:
It's not stable (as parsif...
Rails “validates_uniqueness_of” Case Sensitivity
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validates_uniqueness_of :name, :case_sensitive => false does the trick, but you should keep in mind that validates_uniqueness_of does not guarantee uniqueness if you have multiple servers/server processes (e.g. running Phusio...
Difference between Document-based and Key/Value-based databases?
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Relation between CommonJS, AMD and RequireJS?
...h dependencies, an exports variable to export module contents and a module identifier (which describes the location of the module in question in relation to this module) that is used to require the dependencies (source). CommonJS has various implementations, including Node.js, which you mentioned.
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Search for “does-not-contain” on a DataFrame in pandas
... edited Oct 16 '18 at 7:07
Shaido
20.4k1313 gold badges5151 silver badges6060 bronze badges
answered Dec 15 '16 at 21:10
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How to convert a boolean array to an int array
...gt;0 else 0 and the same as if x: y = 1 ""NEXT LINE"" else: y = 0....how did you learn those tricks, i didn't see it in the if statement documentation?
– Kwolf
Jul 6 '13 at 23:11
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What is the difference between `raise “foo”` and `raise Exception.new(“foo”)`?
...ph was the most illuminating, and let me to discover at irb something you didn't mention: RuntimeError < StandardError < Exception [2] therefore, that second block of code will catch both an Exception and a RuntimeError [3] it's interesting/odd that "bare" raise and rescue happen to work with ...