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Using Default Arguments in a Function
...ou can make a call like foo('blah', null, 'non-default y value'); and have it work as you want, where the second parameter $x still gets its default value.
With this method, passing a null value means you want the default value for one parameter when you want to override the default value for a par...
How and/or why is merging in Git better than in SVN?
...tributed version control systems shine, is much better merging than in traditional tools like SVN.
Is this actually due to inherent differences in how the two systems work, or do specific DVCS implementations like Git/Mercurial just have cleverer merging algorithms than SVN?
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Is Tomcat running?
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Why grep ps, when the pid has been written to the $CATALINA_PID file?
I have a cron'd checker script which sends out an email when tomcat is down:
kill -0 `cat $CATALINA_PID` > /dev/null 2>&1
if [ $? -gt 0 ]
then
echo "Check tomcat" | mailx -s "T...
Why do we need the “event” keyword while defining events?
... the "event" keyword while defining events, when we can do the same thing without using "event" keyword, just by using the delegates.
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Objective-C class -> string like: [NSArray className] -> @“NSArray”
I am trying to get a string name of a class from the class object itself.
3 Answers
3
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What is the benefit of using $() instead of backticks in shell scripts?
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The major one is the ability to nest them, commands within commands, without losing your sanity trying to figure out if some form of escaping will work on the backticks.
An example, though somewhat contrived:
deps=$(find /dir -name $(ls -1tr 201112...
typedef fixed length array
I have to define a 24-bit data type.I am using char[3] to represent the type. Can I typedef char[3] to type24 ? I tried it in a code sample. I put typedef char[3] type24; in my header file. The compiler did not complain about it. But when I defined a function void foo(type24 val) {} in my C...
Java null check why use == instead of .equals()
... to see if two objects are equal according to their contract for what equality means. It's entirely possible for two distinct object instances to be "equal" according to their contract. And then there's the minor detail that since equals is a method, if you try to invoke it on a null reference, you'...
Junit - run set up method once
I set up a class with a couple of tests and rather than using @Before I would like to have a setup method that executes only once before all tests. Is that possible with Junit 4.8?
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Swift - Split string over multiple lines
How could I split a string over multiple lines such as below?
15 Answers
15
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