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Archive for August 24th, 2009

jLinq Screencast #3 – Modifying Records During A Query

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Sometimes when you get your records they aren’t exactly what you we’re needing, or sometimes some of the fields need to be formatted before they can be queried against. Fortunately, jLinq comes with that functionality built into it.

This screencast goes over several of the methods you have available to you that allow records to be formatted before they are selected.

  • each(delegate(record)): Performs a loop through each of the values in the array. This code can be used to modify records, create new properties or anything you need it to do.
  • attach(alias, delegate(record)): Performs the method passed in on each of the records in the array and attaches the result to the record using the alias provided.
  • join(records, alias, foreignKey, primaryKey): Joins two arrays together using the alias and the keys to match the values. Joins tend to be slow when using large arrays, so use caution.


screencast3

If you have any recommendations or requests for the next screencast, please let me know and I’ll see what I can do.

Side note: Never improvise on a screen cast – nothing like having to redo a screen cast twice because you say something that isn’t true and then realize it while recording. 🙂

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Written by hugoware

August 24, 2009 at 2:21 am