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Qt events and signal/slots
... virtual function in a Qt class, which you're expected to reimplement in a base class of yours if you want to handle the event. It's related to the Template Method pattern.
Note how I used the word "handle". Indeed, here's a basic difference between the intent of signals and events:
You "handle" ...
Vim 80 column layout concerns
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You can even automatically base the value of 'colorcolumn' on 'textwidth' with something like :set cc=+1
– graywh
Oct 1 '10 at 16:37
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How to replace all occurrences of a string?
...al standard method on the String built-in prototype.
Regular Expression Based Implementation
String.prototype.replaceAll = function(search, replacement) {
var target = this;
return target.replace(new RegExp(search, 'g'), replacement);
};
Split and Join (Functional) Implementation
Stri...
Interface defining a constructor signature?
... I would chip in here - specifically to show how you could use an abstract base class in tandem with your existing Interface and maybe cut down on the amount of refactoring needed in the future for similar situations. This concept has already been hinted at in some of the comments but I thought it ...
When is the thread pool used?
...s use of native C++ and libuv is likely to use the thread pool (think: database access)
libuv has a default thread pool size of 4, and uses a queue to manage access to the thread pool - the upshot is that if you have 5 long-running DB queries all going at the same time, one of them (and any other as...
libxml install error using pip
...talled **
From the lxml documentation, assuming you are running a Debian-based distribution :
sudo apt-get install libxml2-dev libxslt-dev python-dev
For Debian based systems, it should be enough to install the known build dependencies of python-lxml or python3-lxml, e.g.
sudo apt-get build-de...
How to prevent ifelse() from turning Date objects into numeric objects
..._new),as.character(dates)))
This wouldn't require any library apart from base R.
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Choosing a stand-alone full-text search server: Sphinx or SOLR? [closed]
... of Lucene, which is a proven technology over 8 years old with a huge user base (this is only a small part). Whenever Lucene gets a new feature or speedup, Solr gets it too. Many of the devs committing to Solr are also Lucene committers.
Sphinx integrates more tightly with RDBMSs, especially MySQL.
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How long is the SHA256 hash?
...t I don't know how long to make my VARCHAR when setting up the MySQL database. What is a good length?
5 Answers
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Exposing database IDs - security risk?
I've heard that exposing database IDs (in URLs, for example) is a security risk, but I'm having trouble understanding why.
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