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Compare two MySQL databases [closed]
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If you're working with small databases I've found running mysqldump on both databases with the --skip-comments and --skip-extended-insert options to generate SQL scripts, then running diff on the SQL scripts works pretty well.
By skipping comments y...
Bypass confirmation prompt for pip uninstall
I'm trying to uninstall all django packages in my superuser environment to ensure that all my webapp dependencies are installed to my virtualenv.
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Smooth scrolling when clicking an anchor link
...te April 2018: There's now a native way to do this:
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
anchor.addEventListener('click', function (e) {
e.preventDefault();
document.querySelector(this.getAttribute('href')).scrollIntoView({
behavior: 'smo...
Remove white space below image [duplicate]
...ions are necessary, the layout was in the question (so was the code, originally)
– robertc
Apr 20 '18 at 10:35
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show 1 more comment
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What is an initialization block?
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First of all, there are two types of initialization blocks:
instance initialization blocks, and
static initialization blocks.
This code should illustrate the use of them and in which order they are executed:
public class Test {
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Hg: How to do a rebase like git's rebase
...er mq nor rebase are enabled by default in mercurial: because mercurial is all about indelible changesets. When I work in the manner you're describing, which is nearly daily, here's the pattern I take:
1. Start working on a new feature:
$ hg clone mainline-repo newfeature-123
do a few commits (M, ...
How can I quickly sum all numbers in a file?
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For a Perl one-liner, it's basically the same thing as the awk solution in Ayman Hourieh's answer:
% perl -nle '$sum += $_ } END { print $sum'
If you're curious what Perl one-liners do, you can deparse them:
% perl -MO=Deparse -nle '$sum += $_ } END ...
CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
When building a class in CoffeeScript, should all the instance method be defined using the => ("fat arrow") operator and all the static methods being defined using the -> operator?
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How to log something in Rails in an independent log file?
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If you want to change all the default logging for that specific model, you can simply use User.logger = Logger.new(STDOUT) or wherever you want to log to. In the same way, ActiveRecord::Base.logger = Logger.new(STDOUT) will change all the logging ...
NoClassDefFoundError - Eclipse and Android
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I had this problem after updating ADT.
I was storing all of my JAR files in a folder called "lib" and adding the jars to the build path the normal Eclipse way. This worked fine until my update.
After my update, I was getting the NoClassDefFoundError for a class that I could c...