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How to run Rails console in the test environment and load test_helper.rb?
...ase, so I'm unclear on what class/module it inherits its initialize method from. But it looks like the parameter it expects gets stored as @NAME on the created object.
– Nick Davies
Jun 2 '17 at 14:25
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Why does (0 < 5 < 3) return true?
...he programmer uses to explicitly check a type. This is implicit conversion from a boolean to an integer.
– erickson
Nov 4 '10 at 18:27
4
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How to know what the 'errno' means?
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For reference, here is a list from Ubuntu 14.04 amd64 pastebin.com/407gDBPq
– kevinf
Aug 8 '14 at 18:31
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Execute JavaScript code stored as a string
...y function, and execute it. The catch block can then insert error messages from the JavaScript engine into a DOM element and display any errors in the code. If someone wants the function I wrote, then once I've tidied it up, I can post it here.
– David Edwards
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How can I truncate a double to only two decimal places in Java?
...es ( I mean for the calculation and just to do truncate without Rounding).
From the How to round a number to n decimal places in Java link
private static BigDecimal truncateDecimal(double x,int numberofDecimals)
{
if ( x > 0) {
return new BigDecimal(String.valueOf(x)).setScale(numbe...
Get elements by attribute when querySelectorAll is not available without using libraries?
...hat link states that support starts in IE11 even though it actually starts from IE8 - maybe this should be swapped to developer.mozilla.org/en-US/docs/Web/API/Element/… so it actually supports the answer...?
– Zze
Sep 12 '17 at 20:26
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Map over object preserving keys
....js, if called with a javascript object, returns an array of values mapped from the object's values.
11 Answers
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Why check both isset() and !empty()
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I've no idea where I got that idea from. Plus one'd.
– karim79
Dec 30 '10 at 4:27
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What is the difference between Spring, Struts, Hibernate, JavaServer Faces, Tapestry?
...n action-based presentation framework, the version 2 of the above (created from a merge of WebWork with Struts).
Hibernate is an object-relational mapping tool, a persistence framework.
JavaServer Faces is component-based presentation framework.
JavaServer Pages is a view technology used by all ment...
Format bytes to kilobytes, megabytes, gigabytes
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return round($bytes, $precision) . ' ' . $units[$pow];
}
(Taken from php.net, there are many other examples there, but I like this one best :-)
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