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Showing Difference between two datetime values in hours
...nce the value is retrieved, I need the difference between the two values.
For that, I create a timespan variable to store the difference of the 2 date values.
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Crontab - Run in directory
...he root crontab. But I would like it to execute it from a particular directory so it can find all the files it needs, since the application has a bunch of relative paths.
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Ruby: How to post a file via HTTP as multipart/form-data?
I want to do an HTTP POST that looks like an HMTL form posted from a browser. Specifically, post some text fields and a file field.
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What's the difference between URI.escape and CGI.escape?
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There were some small differences, but the important point is that URI.escape has been deprecated in Ruby 1.9.2... so use CGI::escape or ERB::Util.url_encode.
There is a long discussion on ruby-core for those interested which also mentions WEBrick::HTTPUtils.escape and ...
How to check whether an object has certain method/property?
...ic pattern perhaps? You can call any method/property using the dynamic keyword, right? How to check whether the method exist before calling myDynamicObject.DoStuff(), for example?
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Is 161803398 A 'Special' Number? Inside of Math.Random()
...answer is 'Because of Math', but I was hoping someone could give a little more insight at a basic level...
2 Answers
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How to get a JavaScript object's class?
...d to Java being a class-based one.
Depending on what you need getClass() for, there are several options in JavaScript:
typeof
instanceof
obj.constructor
func.prototype, proto.isPrototypeOf
A few examples:
function Foo() {}
var foo = new Foo();
typeof Foo; // == "function"
typeof ...
C++, variable declaration in 'if' expression
...a = false))) {
// what is "a" initialized to?
The "&&" operator is a short-circuit logical AND. That means that if the first part (1==0) turns out to be false, then the second part (bool a = false) should be not be evaluated because it is already known that the final answer will be fa...
How can I open the interactive matplotlib window in IPython notebook?
...etimes like to quickly switch to the interactive, zoomable matplotlib GUI for viewing plots (the one that pops up when you plot something in a terminal Python console). How could I do that? Preferably without leaving or restarting my notebook.
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How can I find out the total physical memory (RAM) of my linux box suitable to be parsed by a shell
I'm typing a shell script to find out the total physical memory in some RHEL linux boxes.
13 Answers
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