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Removing Java 8 JDK from Mac
...emove them once you know everything else works.
I haven't found I need to set JAVA_HOME for simple things.
Note: I just tried running IntelliJ and it will not start unless you have Apple's JDK 6 installed (see http://youtrack.jetbrains.com/issue/IDEA-93710). Same is true for Eclipse. Netbeans wor...
How to install trusted CA certificate on Android device?
... System-installed certificates can be managed on the Android device in the Settings -> Security -> Certificates -> 'System'-section, whereas the user trusted certificates are manged in the 'User'-section there. When using user trusted certificates, Android will force the user of the Android...
Odd behavior when Java converts int to byte?
...01
Since the 32nd bit is now the sign bit instead of the 8th bit (and we set the sign bit to 0 which is positive), the original 8 bits from the byte are read by Java as a positive value.
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What's the difference between faking, mocking, and stubbing?
...Mock and Stub. I use Mock when it's an object that returns a value that is set to the tested class. I use Stub to mimic an Interface or Abstract class to be tested. In fact, it doesn't really matter what you call it, they are all classes that aren't used in production, and are used as utility classe...
Local Storage vs Cookies
...elds or something). This might be okay if the server only needs a small subset of the total data for each request.
You'll want to leave your session cookie as a cookie either way though.
As per the technical difference, and also my understanding:
Apart from being an old way of saving data, Cooki...
What exactly does += do in python?
...ng that also modifies the variable:
-=, subtracts a value from variable, setting the variable to the result
*=, multiplies the variable and a value, making the outcome the variable
/=, divides the variable by the value, making the outcome the variable
%=, performs modulus on the variable, with the...
Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED
...xed but now new error show i.e, "Error: ERR wrong number of arguments for 'set' command"
– vineet
Aug 27 '15 at 11:58
1
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Group a list of objects by an attribute : Java
...ent>());
}
groupedStudents.get(key).add(student);
}
//print
Set<String> groupedStudentsKeySet = groupedCustomer.keySet();
for (String location: groupedStudentsKeySet) {
List<Student> stdnts = groupedStudents.get(location);
for (Student student : stdnts) {
Sys...
Looping through the content of a file in Bash
...loop is part of a pipeline, it runs in a subshell, and hence any variables set inside the loop are lost when it exits (see bash-hackers.org/wiki/doku.php/mirroring/bashfaq/024). This can be very annoying (depending on what you're trying to do in the loop).
– Gordon Davisson
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Passing arguments to C# generic new() of templated type
...ions of C#. I would like to make my classes immutable: Having just private setters would make the class impossible to be in an invalid state by side effects. I also like to use that Func and lambda, but I know it still is a problem in bussiness world as generally programmers don't know lambdas yet a...