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What is Ruby's double-colon `::`?
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:: is basically a namespace resolution operator. It allows you to access items in modules, or class-level items in classes. For example, say you had this setup:
module SomeModule
module InnerModule
class MyClass
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Changing the child element's CSS when the parent is hovered
First of all, I'm assuming this is too complex for CSS3, but if there's a solution in there somewhere, I'd love to go with that instead.
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Jenkins Host key verification failed
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Change to the jenkins user and run the command manually:
git ls-remote -h git@bitbucket.org:person/projectmarket.git HEAD
You will get the standard SSH warning when first connecting to a new host via SSH:
The authenticity of host 'bitbucket.org (207.223.240.181)' can't be...
Binary search (bisection) in Python
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I originally +1'ed this, but now I've come to the conclusion this isn't a good thing. If this answer is followed, it'll cause a lot of code duplication, and as we all know, it's really simple to f*ck up binary search.
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Inserting a PDF file in LaTeX
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Use the pdfpages package.
\usepackage{pdfpages}
To include all the pages in the PDF file:
\includepdf[pages=-]{myfile.pdf}
To include just the first page of a PDF:
\includepdf[pages={1}]{myfile.pdf}
Run texdoc pdfpages in a shell to see the complete manual for pdfpages.
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Scoping in Python 'for' loops
I'm not asking about Python's scoping rules; I understand generally how scoping works in Python for loops. My question is why the design decisions were made in this way. For example (no pun intended):
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Insert a string at a specific index
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Here is a method I wrote that behaves like all other programming languages:
String.prototype.insert = function(index, string) {
if (index > 0)
{
return this.substring(0, index) + string + this.substring(index, this.length);
}
return string + this;
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Fade In Fade Out Android Animation in Java
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What if you want to do 5 or 6 fading in/out, with really small delays like 100 for each, could you use something like this ? I tried but it's not really fluid. The aim was to simulate for example a bulb that would not work properly, and twinkle.
– Chayy
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How to delete from multiple tables in MySQL?
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I tried this "delete all in 1 query" with joining 6 large tables (everyone about ~15k rows) and the query took 155 seconds to delete 63 rows in 6 tables :O
– Klemen Tušar
Jul 30 '12 at 21:29
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How to center a Window in Java?
... @kleopatra said on another answer, setLocationRelativeTo(null) has to be called after pack() in order to work.
– Eusebius
Apr 19 '14 at 5:18
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