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Using Pairs or 2-tuples in Java [duplicate]
...ions of how to design this class further regarding equality, immutability, etc., especially if you plan to use instances as keys for hashing.
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Why have header files and .cpp files? [closed]
...hingElse(); // Defined in B.CPP
}
// B.CPP
void doSomethingElse()
{
// Etc.
}
It won't compile because A.CPP has no way to know "doSomethingElse" exists... Unless there is a declaration in A.CPP, like:
// A.CPP
void doSomethingElse() ; // From B.CPP
void doSomething()
{
doSomethingElse() ...
How to install trusted CA certificate on Android device?
...rsion Gingerbread & Froyo, there was a single read-only file ( /system/etc/security/cacerts.bks ) containing the trust store with all the CA ('system') certificates trusted by default on Android. Both system apps and all applications developed with the Android SDK use this. Use these instruction...
Why do we need boxing and unboxing in C#?
... a different method overload for each value type (bit, byte, int16, int32, etc etc etc).
Boxing prevented this from happening. And that's why the British celebrate Boxing Day.
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open_basedir restriction in effect. File(/) is not within the allowed path(s):
...andler section directive Server Root.
For example, in my case this way - / etc / httpd / httpd.conf.
Open the file httpd.conf, find the mention of the parameter open_basedir. And set it to none. (php_admin_value open_basedir none)
...
Solving a “communications link failure” with JDBC and MySQL [duplicate]
...change the MySQL settings, you can refer to the following files:
Linux: /etc/mysql/my.cnf or /etc/my.cnf (depending on the Linux distribution and MySQL package used)
Windows: C:**ProgramData**\MySQL\MySQL Server 5.6\my.ini (Notice it's ProgramData, not Program Files)
Here are the solutions:
ch...
Dismissing a Presented View Controller
...esented, pushed onto a navigation controller, part of a tab bar controller etc. Using the delegate allows the "presenting" view controller to "dismiss" the view controller using the inverse of whatever method was used to present it.
– David Smith
Aug 2 '19 at 1...
Convert base class to derived class [duplicate]
...e, compared to other solution (like writing a.prop1=b.pro1, a.pro2=b.prop2 etc.)
– nivs1978
Jan 13 at 13:18
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What Computer Science concepts should I know? [closed]
...
Basic programming (including recursion, file I/O, formatted output, loops etc)
Object oriented design (including design patterns etc). You should be able to produce sensible OO designs as well as understanding the concepts.
Scripting and regexes.
Data structures -- lists, sets, hashtables, trees, g...
How can I safely create a nested directory?
...rectory due to other factors, such as insufficient permissions, full disk, etc.
One option would be to trap the OSError and examine the embedded error code (see Is there a cross-platform way of getting information from Python’s OSError):
import os, errno
try:
os.makedirs(directory)
except O...