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When to use AtomicReference in Java?
... true) reference assignment (i.e. =) is itself atomic (updating primitive 64-bit types like long or double may not be atomic; but updating a reference is always atomic, even if it's 64 bit) without explicitly using an Atomic*.
See the Java Language Specification 3ed, Section 17.7.
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Most common C# bitwise operations on enums
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skybluecodeflier
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answered Jan 6 '09 at 16:31
HugowareHugoware
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MySQL - Make an existing Field Unique
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ALTER IGNORE TABLE mytbl ADD UNIQUE (columnName);
For MySQL 5.7.4 or later:
ALTER TABLE mytbl ADD UNIQUE (columnName);
As of MySQL 5.7.4, the IGNORE clause for ALTER TABLE is removed and
its use produces an error.
So, make sure to remove duplicate entries first as IGNORE keyword...
How to get current formatted date dd/mm/yyyy in Javascript and append it to an input [duplicate]
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For most uses, replace the last line with "return today;"
– sitesbyjoe
Dec 1 '14 at 22:26
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Ruby's ||= (or equals) in JavaScript?
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edited Oct 24 '17 at 11:52
Syed Aslam
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How do you attach and detach from Docker's process?
... Ken CochraneKen Cochrane
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48
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node and Error: EMFILE, too many open files
...th sockets.)
From My Blog Article: http://www.blakerobertson.com/devlog/2014/1/11/how-to-determine-whats-causing-error-connect-emfile-nodejs.html
How To Isolate
This command will output the number of open handles for nodejs processes:
lsof -i -n -P | grep nodejs
COMMAND PID USER FD TYPE ...
How do I remove duplicates from a C# array?
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437
You could possibly use a LINQ query to do this:
int[] s = { 1, 2, 3, 3, 4};
int[] q = s.Disti...
Test whether string is a valid integer
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184
[[ $var =~ ^-?[0-9]+$ ]]
The ^ indicates the beginning of the input pattern
The - is a litera...
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
...ex 0) and throw an exception when index is 5. The valid indexes here are 0-4 inclusive. The correct, idiomatic for statement here would be:
for (int index = 0; index < array.length; index++)
(That's assuming you need the index, of course. If you can use the enhanced for loop instead, do so.)
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