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Rails respond_with: how does it work?
...nders gem source code.
Original Answer
The code for the responders is based in a class and a module. MimeResponds which is included into ActionController::Base, the class your ApplicationController inherits from. Then there is ActionController::Responder which provides the default behavior when...
Copy rows from one Datatable to another DataTable?
...ly iterating through each, unlike all of the foreach loop, .ForEach method based answers.
– David Burg
Aug 30 '18 at 22:36
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How do you find the row count for all your tables in Postgres
...t executes. You could automate this to run against every table in the database, but you probably don't need that level of accuracy or want to wait that long.
The second approach notes that the statistics collector tracks roughly how many rows are "live" (not deleted or obsoleted by later updates) ...
What are the rules for the “…” token in the context of variadic templates?
...Mixin1, .. public MixinN
That is, mixture derives publicly from all the base classes.
Hope that helps.
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Find region from within an EC2 instance
...2_AVAIL_ZONE\" | sed 's/[a-z]$//'`"
Hope this helps.
EDIT: Improved sed based on comments
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Scala Programming for Android
...
There is also an plugin for the Scala-based builder sbt: sbt-android-plugin.
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Disable Automatic Reference Counting for Some Files
... be disabled in HEADER files. Clang will NOT compile the interface/header based upon the compilation of it's implementation/method file. Therefore, Header files must be compatible with both ARC and non-ARC in a mixed compilation. I view this as a bug in the compiler.
– carmi...
Checking if a string is empty or null in Java [duplicate]
...
import com.google.common.base
if(!Strings.isNullOrEmpty(String str)) {
// Do your stuff here
}
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How to fix the uninitialized constant Rake::DSL problem on Heroku?
...ake", "0.8.7"
2) Take out a hack that I had previously added to Rakefile based on Stack Overflow question Ruby on Rails and Rake problems: uninitialized constant Rake::DSL:
So, my Rakefile is now back to being the standard Rakefile for my app:
# Add your own tasks in files placed in lib/tasks...
Good MapReduce examples [closed]
...when the complexity of the query increases.
Map Reduce provides a cluster based implementation where data is processed in a distributed manner
Here is a wikipedia article explaining what map-reduce is all about
Another good example is Finding Friends via map reduce can be a powerful example to ...