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Practical uses for AtomicInteger
...nd more readable than performing the same using synchronization.
A simple test:
public synchronized int incrementNotAtomic() {
return notAtomic++;
}
public void performTestNotAtomic() {
final long start = System.currentTimeMillis();
for (int i = 0 ; i < NUM ; i++) {
increme...
Numpy first occurrence of value greater than existing value
...t suspicious. argmax does not seem to stop at the first True. (This can be tested by creating boolean arrays with a single True at different positions.) The speed is probably explained by the fact that argmax does not need to create an output list.
– DrV
Oct 8 ...
php check if array contains all array values from another array
...
A bit shorter with array_diff
$musthave = array('a','b');
$test1 = array('a','b','c');
$test2 = array('a','c');
$containsAllNeeded = 0 == count(array_diff($musthave, $test1));
// this is TRUE
$containsAllNeeded = 0 == count(array_diff($musthave, $test2));
// this is FALSE
...
String literals and escape characters in postgresql
...cated the text needed to be preceded with 'E', as such:
insert into EscapeTest (text) values (E'This is the first part \n And this is the second');
This suppressed the warning, but the text was still not being returned correctly. When I added the additional slash as Michael suggested, it worked.
...
[精华] VC中BSTR、Char和CString类型的转换 - C/C++ - 清泛网 - 专注C/C++及内核技术
...可使用CString::format进行。例如：
char chArray[] = "This is a test";
char * p = "This is a test";
或
LPSTR p = "This is a test";
或在已定义Unicode应的用程序中
TCHAR * p = _T("This is a test");
或
LPTSTR p = _T("This is a test");
CString theString = chArray;
...
Remove characters from C# string
...lation, where dozens of lines of code and multiple loops would be needed. Testing the compiled version of this regex against a simple unoptimised loop 50000 times, the regex is 6X slower.
– Tony Cheetham
Feb 13 '18 at 12:07
...
How to exit if a command failed?
...e. With that, any command that fails (outside of specific contexts like if tests) will cause the script to abort. For certain scripts, it's very useful.
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Remove querystring from URL
... I am benchmarking the three methods proposed in the various answers.
var testURL = '/Products/List?SortDirection=dsc&Sort=price&Page=3&Page2=3';
var i;
// Testing the substring method
i = 0;
console.time('10k substring');
while (i < 10000) {
testURL.substring(0, testURL.indexOf...
Can someone copyright a SQL query? [closed]
...s a supplementary work, as a compilation, as an
instructional text, as a test, as answer material for a test, or as an
atlas, if the parties expressly agree in a written instrument signed by
them that the work shall be considered a work made for hire.
Since this query seems to fall within th...
Is it better practice to use String.format over string Concatenation in Java?
...
@MartinSchröder: If you run javap -c StringTest.class you'll see that the compiler converts "+" to StringBuilder automatically only if you are not in a loop. If the concatenation is all done on a single line it's the same as using '+', but if you use myString += "more...