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What exactly is Arel in Rails 3.0?
... I do have one follow up question. You mentioned LDAP, AMZ, etc. above, I assume that currently (based on rails/arel on github) ARel does not have that capability, just the potential? i.e. until someone implements that part. This does sound super exciting though.
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Defining a HTML template to append using JQuery
...ey're read from a DB, or someone could pass in HTML (and then run scripts, etc.) from your page.
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Serializing an object as UTF-8 XML in .NET
...omewhere other than to memory, such as to a file, TCP/IP stream, database, etc. All in all, it's not really that verbose.
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Too many 'if' statements?
...loop variables), named constants, arranging my code in a readable fashion, etc., but when the variable and function names start taking up more than 20 characters each I find it actually leads to less readable code. My usual approach is to try for comprehensible but succinct code with comments here a...
Must Dependency Injection come at the expense of Encapsulation?
...o inject code to the normal method evaluation, adding strange side-effects etc.
Friend declaration in C++ does.
Class extention in Ruby does. Just redefine a string method somewhere after a string class was fully defined.
Well, a lot of stuff does.
Encapsulation is a good and important principle...
When to use inline function and when not to use it?
...inline functions, inline functions that recurse or not depending on input, etc., makes it impossible to guarantee that every call of an inline function is actually inlined. The degree of cleverness of a compiler cannot be legislated, so one compiler might generate 720, another 6 * fac(5), and yet an...
Java generics type erasure: when and what happens?
... say whether or not a method/type is generic, and what the constraints are etc. But when generics are used, they're converted into compile-time checks and execution-time casts. So this code:
List<String> list = new ArrayList<String>();
list.add("Hi");
String x = list.get(0);
is compil...
Handler vs AsyncTask vs Thread [closed]
... and main thread.
Use for small waiting operations like the following:
Fetching some data from web services and display over the layout.
Database query.
When you realize that running operation will never, ever be nested.
Handler:
When we install an application in android, then it creates a thr...
What is a 'Closure'?
...n count;
}
}
var x = makeCounter();
x(); returns 1
x(); returns 2
...etc...
What this function, makeCounter, does is it returns a function, which we've called x, that will count up by one each time its called. Since we're not providing any parameters to x it must somehow remember the count. ...
Why doesn't the JVM cache JIT compiled code?
... the warnings that "this will only be valid with exact same JVM, same data etc and otherwise ignored". Regarding why this has not been implemented, I would expect that the added complexity of persisting and validating the JIT seed data was too much to take resources from other projects. Given the ...