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Difference between & and && in Java? [duplicate]
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'&' performs both tests, while '&&' only performs the 2nd test if the first is also true. This is known as shortcircuiting and may be considered as an optimization. This is especially useful in guarding against nullness(NullPointerExce...
How do I get the coordinates of a mouse click on a canvas element?
...PeppeL-G bounding client rectangle calculates that for you. You can easily test it in console before you post a comment (that's what I did).
– Tomáš Zato - Reinstate Monica
Nov 29 '14 at 17:10
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Fast Linux File Count for a large number of files
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The fastest way is a purpose-built program, like this:
#include <stdio.h>
#include <dirent.h>
int main(int argc, char *argv[]) {
DIR *dir;
struct dirent *ent;
long count = 0;
dir = opendir(argv[1]);
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In Unix, can I run 'make' in a directory without cd'ing to that directory first?
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makefile:
all:
gcc -Wall -Wpedantic -std=gnu99 -g src/test.c -o build/test
run:
./build/test
or
run:
./../build/test
etc.
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Simple Digit Recognition OCR in OpenCV-Python
...txt('generalresponses.data',responses)
Now we enter in to training and testing part.
For testing part I used below image, which has same type of letters I used to train.
For training we do as follows:
Load the txt files we already saved earlier
create a instance of classifier we are using ...
How do I check that a number is float or integer?
... 1 === 0;
}
If you don't know that the argument is a number you need two tests:
function isInt(n){
return Number(n) === n && n % 1 === 0;
}
function isFloat(n){
return Number(n) === n && n % 1 !== 0;
}
Update 2019
5 years after this answer was written, a solution was st...
Count the number of occurrences of a character in a string in Javascript
...t("str").length - 1) //4
Both in @Lo's answer and in my own silly jsperf test split comes ahead in speed, at least in Chrome, but again creating the extra array just doesn't seem sane.
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How do I flush the PRINT buffer in TSQL?
...ed procedure, flushing output is triggered by the GO command, e.g.
print 'test'
print 'test'
go
In general, my conclusion is following: output of mssql script execution, executing in SMS GUI or with sqlcmd.exe, is flushed to file, stdoutput, gui window on first GO statement or until the end of th...
JavaScript check if variable exists (is defined/initialized)
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'if( variable )' also fails for testing for the existence of object properties.
– scotts
May 4 '10 at 22:40
55
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Visual Studio: ContextSwitchDeadlock
...enarios but there is another scenario where this happens when you are unit testing and you try to "Debug Selected Tests" from the Test Explorer when you solution is not set to Debug.
In this case you need to change your solution from Release or whatever it is set to to Debug in this case. If this ...