Tutorial by Topics: mr



Custom requests (or Form Requests) are useful in situations when one wants to authorize & validate a request before hitting the controller method.

One may think of two practical uses, creating & updating a record while each action has a different set of validation (or authorization) rules.

Using Form Requests is trivial, one has to type-hint the request class in method.

In database systems, isolation determines how transaction integrity is visible to other users and systems, so it defines how/when the changes made by one operation become visible to other. The phantom read may occurs when you getting data not yet commited to database.

A customization of the Android RangeSeekBar proposed by Alex Florescu at https://github.com/anothem/android-range-seek-bar

It allows to define a step value (increment), when moving the seek bar

When processing a given record, you will oft need to retrieve data from one of its related records. For example, when working with a given Sales Order, you may need to retrieve data from the related Sales Rep. In SuiteScript terminology, this is called a lookup.

Lookup functionality is provided by the nlapiLookupField global function in SuiteScript 1.0 and the N/search module's lookupFields method in SuiteScript 2.0

The basic thing to remember here is that debugging a Hadoop MR job is going to be similar to any remotely debugged application in Eclipse.

A debugger or debugging tool is a computer program that is used to test and debug other programs (the “target” program). It is greatly useful specially for a Hadoop environment wherein there is little room for error and one small error can cause a huge loss.

An R Notebook is an R Markdown document with chunks that can be executed independently and interactively, with output visible immediately beneath the input. They are similar to R Markdown documents with the exception of results being displayed in the R Notebook creation/edit mode rather than in the rendered output. Note: R Notebooks are new feature of RStudio and are only available in version 1.0 or higher of RStudio.


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