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JUnit confusion: use 'extends TestCase' or '@Test'?
...
The distinction is rather easy:
extending TestCase is the way unit tests were written in JUnit 3 (of course it's still supported in JUnit 4)
using the @Test annotation is the way introduced by JUnit 4
Generally you should choose the annotation path, unless compatib...
How does HTTP file upload work?
...each one.
You can produce examples using:
nc -l or an ECHO server: HTTP test server accepting GET/POST requests
an user agent like a browser or cURL
Save the form to a minimal .html file:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>u...
Ruby regular expression using variable name
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The code you think doesn't work, does:
var = "Value"
str = "a test Value"
p str.gsub( /#{var}/, 'foo' ) # => "a test foo"
Things get more interesting if var can contain regular expression meta-characters. If it does and you want those matacharacters to do what they usually do in...
javascript function leading bang ! syntax
...execute it. But that will not work due to specifics of JS grammar.
So shortest form of achieving this is to use some expression e.g. UnaryExpression (and so CallExpression):
!function(){
// do stuff
}();
Or for the fun:
-function(){
// do stuff
}();
Or:
+function(){
// do stuff
}()...
UnboundLocalError on local variable when reassigned after first use
...f you want to modify it, you have to use the global keyword. Try changing test() to this:
def test():
global c
print(a)
print(b)
print(c) # (A)
c+=1 # (B)
Also, the reason you are getting this error is because you can also declare a new variable inside that function...
Change the current directory from a Bash script
...dren, never on the parent.
If goal is to run your command :
goto.sh /home/test
Then work interactively in /home/test one way is to run a bash interactive subshell within your script :
#!/bin/bash
cd $1
exec bash
This way you will be in /home/test until you exit ( exit or Ctrl+C ) of this shell.
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Can a for loop increment/decrement by more than one?
...
A for loop:
for(INIT; TEST; ADVANCE) {
BODY
}
Means the following:
INIT;
while (true) {
if (!TEST)
break;
BODY;
ADVANCE;
}
You can write almost any expression for INIT, TEST, ADVANCE, and BODY.
Do note that the ++ ope...
How do I determine scrollHeight?
...rollHeight is a regular javascript property so you don't need jQuery.
var test = document.getElementById("foo").scrollHeight;
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CHECK constraint in MySQL is not working
...ple for BEFORE INSERT working after MySQL 5.5
DELIMITER $$
CREATE TRIGGER `test_before_insert` BEFORE INSERT ON `Test`
FOR EACH ROW
BEGIN
IF CHAR_LENGTH( NEW.ID ) < 4 THEN
SIGNAL SQLSTATE '12345'
SET MESSAGE_TEXT := 'check constraint on Test.ID failed';
END IF;
END$$ ...
Alarm Manager Example
...ntService::class.java)
intent.action = MyIntentService.ACTION_SEND_TEST_MESSAGE
intent.putExtra(MyIntentService.EXTRA_MESSAGE, message)
pendingIntent = PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
alarmManager.set(AlarmManager.RTC_W...