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Difference between map and collect in Ruby?
...ulti-paradigm languages as well: In C++'s Standard Template Library, it is called transform, in C# (3.0)'s LINQ library, it is provided as an extension method called Select. Map is also a frequently used operation in high level languages such as Perl, Python and Ruby; the operation is called map in ...
How to add an extra source directory for maven to compile and include in the build jar?
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<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<...
Xcode: Build Failed, but no error messages
...port Navigator present in Navigator window.
Open Navigator by pressing Hide/Show Navigator button present in top-left side of Xcode.
Open Report Navigator by pressing last button present on list of buttons in Navigator window.
Here you can view reasons either By Group or By Time
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Subclassing a Java Builder class
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You can solve it using generics. I think this is called the "Curiously recurring generic patterns"
Make the return type of the base class builder methods a generic argument.
public class NutritionFacts {
private final int calories;
public static class Builder<...
How can I check whether a option already exist in select by JQuery
...h can be good for beginners. Certainly not the best answer, but it is a valid one.
– roberthuttinger
Apr 9 '13 at 14:42
1
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Difference between $(window).load() and $(document).ready() functions
...mportant difference from the window.load is that it will run on ALL future calls of the function, even after the initial DOMready.
– Michael Butler
Apr 3 '14 at 21:29
2
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optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
...ns.fetch :foo, default_value when default_value is a method, as it will be called anyway in order to pass its result to fetch.
If your default_value is a method, you can wrap it in a block: local_assigns.fetch(:foo) { default_value } to prevent its call when it's not needed.
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How to move columns in a MySQL table?
Currently I am having the following MySQL table: Employees (empID, empName, department);
4 Answers
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Spring DAO vs Spring ORM vs Spring JDBC
...ate you to write DAO, and to write them well. As such, it does neither provide interfaces nor implementations nor templates to access your data. When writing a DAO, you should annotate them with @Repository so that exceptions linked to the underlying technology (JDBC, Hibernate, JPA, etc.) are consi...
What is meant by Resource Acquisition is Initialization (RAII)?
... Oops, throws exception
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deleteResource(handle); // oh dear, never gets called so the resource leaks
With the RAII one
class ManagedResourceHandle {
public:
ManagedResourceHandle(RawResourceHandle* rawHandle_) : rawHandle(rawHandle_) {};
~ManagedResourceHandle() {delete rawHandle; }
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