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What is Inversion of Control?
...llChecker class.
In the second code example we are creating an abstraction by having the SpellChecker dependency class in TextEditor's constructor signature (not initializing dependency in class). This allows us to call the dependency then pass it to the TextEditor class like so:
SpellChecker sc = n...
What is the >>>= operator in C?
Given by a colleague as a puzzle, I cannot figure out how this C program actually compiles and runs. What is this >>>= operator and the strange 1P1 literal? I have tested in Clang and GCC. There are no warnings and the output is "???"
...
Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in Java
...UNIX) and according to range:
1-127 are user defined codes (so generated by calling exit(n))
128-255 are codes generated by termination due to different unix signals like SIGSEGV or SIGTERM
But I don't think you should care while coding on Java, it's just a bit of information. It's useful if you...
SQL to determine minimum sequential days of access?
...d, 0, uh1.CreationDate), 0))
AND uh1.UserId = uh2.UserId
GROUP BY uh1.Id, uh1.UserId
) as Tbl
WHERE Conseq >= @days
EDIT:
[Jeff Atwood] This is a great fast solution and deserves to be accepted, but Rob Farley's solution is also excellent and arguably even faster (!). Please c...
Need some clarification about beta/alpha testing on the developer console
...ing, closed testing, pausing tracks and stage rollouts, don't get confused by these terms.
1. Open testing - It means that you don't need to invite them, like no need to take their Gmail and add it to the user list. (Beta testing)
2. Closed testing - It means that you need to specifically add the us...
How can I determine whether a Java class is abstract by reflection
...a Jar file and wish to find those which are not abstract. I can solve this by instantiating the classes and trapping InstantiationException but that has a performance hit as some classes have heavy startup. I can't find anything obviously like isAbstract() in the Class.java docs.
...
What is the difference between print and puts?
...a newline after each argument. That's a key point and not clear from the Ruby docs (since the example has only 1 argument).
– cdunn2001
Jul 29 '12 at 23:49
3
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Order discrete x scale by frequency/value
...ed in alphabetical order, but I need to rearrange it so that it is ordered by the value of the y-axis (i.e., the tallest bar will be positioned on the left).
...
How to pull a random record using Django's ORM?
...
Using order_by('?') will kill the db server on the second day in production. A better way is something like what is described in Getting a random row from a relational database.
from django.db.models.aggregates import Count
from random ...
How do I make $.serialize() take into account those disabled :input elements?
It seems by default disabled input elements are ignored by $.serialize() . Is there a workaround?
9 Answers
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