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Spring @PostConstruct vs. init-method attribute
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No practically I don't think there is any difference but there are priorities in the way they work. @PostConstruct, init-method are BeanPostProcessors.
@PostConstruct is a JSR-250 annotation while init-method is Spring's way of havin...
How to test if list element exists?
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This is actually a bit trickier than you'd think. Since a list can actually (with some effort) contain NULL elements, it might not be enough to check is.null(foo$a). A more stringent test might be to check that the name is actually defin...
Replacing instances of a character in a string
...lace in:
line = line[:10].replace(';', ':') + line[10:]
That'll replace all semi-colons in the first 10 characters of the string.
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How do I find duplicates across multiple columns?
...simple and efficient means to locate unwanted repetition, whilst also list all affected rows and all wanted columns:
SELECT
t.*
FROM (
SELECT
s.*
, COUNT(*) OVER (PARTITION BY s.name, s.city) AS qty
FROM stuff s
) t
WHERE t.qty > 1
ORDER BY t.name, t.city
While most...
Most common way of writing a HTML table with vertical headers?
Hi all it's been a while since I've asked something, this is something that has been bothering me for a while, the question itself is in the title:
...
List of All Locales and Their Short Codes?
I'm looking for a list of all locales and their short codes for a PHP application I am writing. Is there much variation in this data between platforms?
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Is there a macro recorder for Eclipse? [closed]
...nd it works great. In order to make it work, then the file PracticallyMacro_0.4.9.jar needs to be put in the eclipse/downloads/plugins directory (create the plugins directory if it doesn't exist). You can edit macros by going to Windows/Preferences/Practically Macro Options and you can run the macro...
How do I “undo” a --single-branch clone?
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You can tell Git to pull all branches like this:
git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
git fetch origin
If you look in .git/config, it'll look something like this:
[core]
repositoryformatversion = 0
filemode...
CSS last-child selector: select last-element of specific class, not last child inside of parent?
...se this method to select the first-child of a class.
/* 1: Apply style to ALL instances */
#header .some-class {
padding-right: 0;
}
/* 2: Remove style from ALL instances except FIRST instance */
#header .some-class~.some-class {
padding-right: 20px;
}
This is actually applying the class to t...
Drop columns whose name contains a specific string from pandas DataFrame
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I really wonder what the comments saying this answer is "elegant" means. I myself find it quite obfuscated, when python code should first be readable. It also is twice as slower than the first answer. And it uses the regex keywor...