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How to debug Ruby scripts [closed]
I copied the following Ruby code from the Internet and made a few changes but it doesn't work.
17 Answers
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What is the difference between compare() and compareTo()?
... classes that implement this, to pass to methods such as sort() or for use by sorting data structures such as TreeMap and TreeSet. You might want to create a Comparator object for the following:
Multiple comparisons. To provide several different ways to sort something. For example, you might want ...
What is the difference between 'my' and 'our' in Perl?
... summary:
my variables are lexically scoped within a single block defined by {} or within the same file if not in {}s. They are not accessible from packages/subroutines defined outside of the same lexical scope / block.
our variables are scoped within a package/file and accessible from any code ...
Why does struct alignment depend on whether a field type is primitive or user-defined?
...e're moving to nanosecond resolution. That means we can no longer use an 8-byte integer to represent the whole range of time we're interested in. That has prompted me to investigate the memory usage of the (many) structs of Noda Time, which has in turn led me to uncover a slight oddity in the CLR's ...
How can I use Spring Security without sessions?
...
@workerjoe So, what you are trying to say by this java configuration, the sessions are not created by spring security rather tomcat?
– Vishwas Atrey
May 8 at 20:50
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When do I need to use AtomicBoolean in Java?
...lize();
initialized = true;
}
This is not thread-safe. You can fix it by using AtomicBoolean:
if (atomicInitialized.compareAndSet(false, true)) {
initialize();
}
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How do emulators work and how are they written? [closed]
...ions so I can continue to improve this answer.
Basic idea:
Emulation works by handling the behavior of the processor and the individual components. You build each individual piece of the system and then connect the pieces much like wires do in hardware.
Processor emulation:
There are three ways of ...
Synchronization vs Lock
...n. Implementations of the Lock interface enable the use of such techniques by allowing a lock to be acquired and released in different scopes, and allowing multiple locks to be acquired and released in any order.
With this increased flexibility comes additional responsibility. The absence of bl...
Multiple queries executed in java in single statement
...E;"
Yes it is possible. There are two ways, as far as I know. They are
By setting database connection property to allow multiple queries,
separated by a semi-colon by default.
By calling a stored procedure that returns cursors implicit.
Following examples demonstrate the above two possibilitie...
Remote Connections Mysql Ubuntu
... the localhost and '%' as in.
CREATE USER 'myuser'@'localhost' IDENTIFIED BY 'mypass';
CREATE USER 'myuser'@'%' IDENTIFIED BY 'mypass';
then,
GRANT ALL ON *.* TO 'myuser'@'localhost';
GRANT ALL ON *.* TO 'myuser'@'%';
and finally,
FLUSH PRIVILEGES;
EXIT;
If you don't have the same user cr...