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Pros and cons of Java rules engines [closed]
...stablished algorithms (such as forward chaining and the Rete algorithm) in order to scale up to non-trivial problems. If you are simply evaluating expressions, an existing library such as MVEL may be useful.
– jevon
Feb 28 '11 at 6:19
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How to reload a clojure file in REPL
...efined in a Clojure file without having to restart the REPL. Right now, in order to use the updated file I have to:
8 Answe...
SQL query to select dates between two dates
...
You might mention that the order matters in the BETWEEN function. It has to go from oldest on the left and more recent on the right. This is unintuitive as = is a comparative operator in sql and works for both "EmployeeId = 1" or "1 = EmployeeId" in t...
Assign same value to multiple variables at once?
...y means $a = ( $b = ( $c = $d ) )
PHP passes primitive types int, string, etc. by value and objects by reference by default.
That means
$c = 1234;
$a = $b = $c;
$c = 5678;
//$a and $b = 1234; $c = 5678;
$c = new Object();
$c->property = 1234;
$a = $b = $c;
$c->property = 5678;
// $a,b,c-&g...
Open firewall port on CentOS 7
...le approaches, it is useful to note that you can add your own services to /etc/firewalld/services. For inspiration, look at /usr/lib/firewalld/services/, where firewalld's predefined services are located.
The advantage of this approach is that later you will know why these ports are open, as you've...
What is the dependency inversion principle and why is it important?
...ava and .NET, that deal with all situations (static methods, constructors, etc.). Applying DIP tends to make software more complex and less maintainable, and no more testable.
– Rogério
Aug 31 '09 at 17:33
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What is the purpose of shuffling and sorting phase in the reducer in Map Reduce Programming?
...nding K1,V2 and K1,V4 to different reducers as they need to be together in order to be reduced.
Tried explaining it as simply as possible
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Open and write data to text file using Bash?
... knowing exactly what to do with this file. How to save it, how to run it, etc.
– Danny
Sep 22 '16 at 5:52
16
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How to test if a string is basically an integer in quotes using Ruby
... String
def integer?
[ # In descending order of likeliness:
/^[-+]?[1-9]([0-9]*)?$/, # decimal
/^0[0-7]+$/, # octal
/^0x[0-9A-Fa-f]+$/, # hexadecimal
/^0b[01]+$/ # binary
].each do |match_pattern|...
Good tutorial for using HTML5 History API (Pushstate?) [closed]
...e real answer. This is nowhere on the Balupton's History.js wiki/tutorials etc. In fact, History.js don't use hash so you need to use a .htaccess redirection !
– adriendenat
Jul 6 '12 at 10:03
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