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Immutability of Strings in Java
...ring. You can change what it points to, but not that which it points at.
Take this code, for example:
String s1 = "Hello";
String s2 = s1;
// s1 and s2 now point at the same string - "Hello"
Now, there is nothing1 we could do to s1 that would affect the value of s2. They refer to the same object - ...
Explicitly select items from a list or tuple
...rray(range(1000))
>>> myBigList[(87, 342, 217, 998, 500)]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
IndexError: invalid index
>>> myBigList[[87, 342, 217, 998, 500]]
array([ 87, 342, 217, 998, 500])
>>> myBigList[numpy.array([87, ...
How to check if a string starts with one of several prefixes?
...
hmjdhmjd
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Retrieving the last record in each group - MySQL
...
MySQL 8.0 now supports windowing functions, like almost all popular SQL implementations. With this standard syntax, we can write greatest-n-per-group queries:
WITH ranked_messages AS (
SELECT m.*, ROW_NUMBER() OVER (PARTITION BY name ORDER BY id DESC) AS rn
FROM mes...
Why are Python's 'private' methods not actually private?
...d variables within a class by prepending double underscores to the name, like this: __myPrivateMethod() . How, then, can one explain this
...
How to wait in a batch script? [duplicate]
... so the ping command doesn't output anything to screen.
You can easily make a sleep command yourself by creating a sleep.bat somewhere in your PATH and use the above technique:
rem SLEEP.BAT - sleeps by the supplied number of seconds
@ping 192.0.2.2 -n 1 -w %1000 > nul
NOTE: The 192.0.2.x...
C++11 features in Visual Studio 2012
...had quite a bit of early C++11 support. So to summarize what is already linked to in other answers, here is what is new in Visual Studio 11 that was not part of Visual Studio 2010:
rvalue references to version 2.1 from 2.0
lambdas to version 1.1 from 1.0.
decltype to version 1.1 from 1.0(not yet a...
SQL Server SELECT INTO @variable?
...ed Jan 28 '11 at 1:34
RichardTheKiwiRichardTheKiwi
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Oracle Differences between NVL and Coalesce
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Jon Heller
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answered Jun 4 '09 at 12:03
QuassnoiQuassnoi
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What does cherry-picking a commit with Git mean?
Recently, I have been asked to cherry-pick a commit.
12 Answers
12
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