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What is context in _.each(list, iterator, [context])?
...
The context lets you provide arguments at call-time, allowing easy customization of generic pre-built helper functions.
some examples:
// stock footage:
function addTo(x){ "use strict"; return x + this; }
function pluck(x){ "use strict"; return x[this]; }
function lt(x){ "use strict"; retu...
Why Choose Struct Over Class?
...to be managed and passed by reference. In practice, this means that
most custom data constructs should be classes, not structures.
Here it is claiming that we should default to using classes and use structures only in specific circumstances. Ultimately, you need to understand the real world impl...
In which case do you use the JPA @JoinTable annotation?
...e following database structure:
The @JoinTable annotation also lets you customize various aspects of the join table. For example, had we annotated the tasks property like this:
@JoinTable(
name = "MY_JT",
joinColumns = @JoinColumn(
name = "PROJ_ID",
...
“Thinking in AngularJS” if I have a jQuery background? [closed]
...ractice.
One of the first things your will notice about AngularJS is that custom attributes are everywhere. Your HTML will be littered with ng attributes, which are essentially onClick attributes on steroids. These are directives (compiler directives), and are one of the main ways in which the temp...
Disadvantages of Test Driven Development? [closed]
...t more code, than if you just do it the "plain old way". Instead of just a customer class, you also need to write an interface, a mock class, some IoC configuration and a few tests.
And remember that the test code should also be maintained and cared for. Tests should be as readable as everything el...
How can I create an executable JAR with dependencies using Maven?
...o integrate all jar-files into the main jar, but then you will need to add custom classloading code to load the jars.
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How to create a memory leak in Java?
...ead pool to leak even faster).
The thread loads a class via an (optionally custom) ClassLoader.
The class allocates a large chunk of memory (e.g. new byte[1000000]), stores a strong reference to it in a static field, and then stores a reference to itself in a ThreadLocal. Allocating the extra memor...
How to append rows to an R data frame
...pend to the table held in memory.
data.frame's own ability to grow and use custom environment (which has reference semantics) to store the data.frame so it will not be copied on return.
Here is a test of all the methods for both small and large number of appended rows. Each method has 3 functions ...
Flask vs webapp2 for Google App Engine
... to those that webapp2 can be used outside of App Engine and is easy to be customized to look like popular micro-frameworks and you have a good set of compelling reasons to go for it. Also, webapp2 has a big chance to be included in a future SDK release (this is extra-official, don't quote me :-) wh...
How to apply multiple styles in WPF
...ry based on a key. Fortunately for us, WPF allows users to write their own custom markup extensions. This feature is not yet present in Silverlight, so the solution in this blog is only applicable to WPF.
Others have written great solutions to merge two styles using markup extensions. However, I wa...