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Count, size, length…too many choices in Ruby?
...ke an element or predicate and count only those items that match.
> [1,2,3].count{|x| x > 2 }
=> 1
In the case where you don't provide a parameter to count it has basically the same effect as calling length. There can be a performance difference though.
We can see from the source code...
How to get execution time in rails console?
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242
timing = Benchmark.measure { Post.all }
The various attributes of the object returned (Bench...
What is the difference between Lisp-1 and Lisp-2?
I have tried to understand the difference between Lisp-1 and Lisp-2 and how this relates to Clojure but I still do not understand properly. Can anyone enlighten me?
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JavaScript exponents
...ll rise a to the power b
Now it is already implemented in Edge14, Chrome52, and also it is available with traceur or babel.
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In Maven 2, how do I know from which dependency comes a transitive dependency?
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132
To add to @David Crow, here's a dependency:tree example from the Maven site:
mvn dependency:tre...
How to quit scala 2.11.0 REPL?
In the last version of scala (2.10.3) REPL, I can type exit to quit from REPL. However, in Scala 2.11.0 this doesn't work.
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Overload constructor for Scala's Case Classes?
In Scala 2.8 is there a way to overload constructors of a case class?
2 Answers
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How to delete object from array inside foreach loop?
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234
foreach($array as $elementKey => $element) {
foreach($element as $valueKey => $value...
How to print formatted BigDecimal values?
...ts money, and I need to print its value in the browser in a format like $123.00 , $15.50 , $0.33 .
6 Answers
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What are the aspect ratios for all Android phone and tablet devices?
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162
In case anyone wanted more of a visual reference:
Decimal approximations reference table:
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