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FixedThreadPool vs CachedThreadPool: the lesser of two evils
...onsequence to using one for long running threads. The comment in the java doc about CachedThreadPools being suitable for short tasks merely suggest that they are particularly appropriate for such cases, not that they cannot or should not be used for tasks involving long running tasks.
To elaborate...
How to move one word left in the vi editor
...
It's b.
You can see other motions here:
Vim documentation: motion, 4. Word motions
Generally a Vim command consists of:
count action motion
Where:
count is number of times you want it to execute. The default is 1.
action is obviously an action: d for delete, c for...
PHP PDO returning single row
... foreach loop needed :D
$row = $STH -> fetch();
example (ty northkildonan):
$dbh = new PDO(" --- connection string --- ");
$stmt = $dbh->prepare("SELECT name FROM mytable WHERE id=4 LIMIT 1");
$stmt->execute();
$row = $stmt->fetch();
...
How to create an array containing 1…N
...rs 1..n that you can later loop through.
If this is all you need, can you do this instead?
var foo = new Array(45); // create an empty array with length 45
then when you want to use it... (un-optimized, just for example)
for(var i = 0; i < foo.length; i++){
document.write('Item: ' + (i + 1...
Extracting the last n characters from a ruby string
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@Hard-BoiledWonderland join works. I don't think you need the last to_s if you use join.
– Andrew Grimm
Dec 5 '12 at 11:15
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How to select last two characters of a string
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slice() reference : developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…
– Offirmo
Oct 30 '13 at 9:20
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Using gradle to find dependency tree
...mand ./gradlew :dependencies >> fileName.txt
– dora2010
Nov 29 '19 at 14:03
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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...wait until dest is ready before executing. This false dependency is (now) documented by Intel as erratum HSD146 (Haswell) and SKL029 (Skylake)
Skylake fixed this for lzcnt and tzcnt.
Cannon Lake (and Ice Lake) fixed this for popcnt.
bsf/bsr have a true output dependency: output unmodified for inpu...
Volatile vs Static in Java
... = 0;
private void concurrentMethodWrong() {
counter = counter + 5;
//do something
counter = counter - 5;
}
Executing concurrentMethodWrong concurrently many times may lead to a final value of counter different from zero!
To solve the problem, you have to implement a lock:
private static f...
Create unique constraint with null columns
...at is actually one of the reasons I advise against it's usage. People who do not know the specifics so well get confused, as in other RDBMS identifiers are (partly) case sensitive. Sometimes people confuse themselves. Or they build dynamic SQL and use quote_ident() as they should and forget to pass...