Sifting for the Corrade scripted agent means to filter out the results of a command returned to a callback. The purpose of sifting is to trim the results that a command produces such that the results may be easier to handle by the scripting language used. In the context of SecondLife, an LSL script can receive via HTTP a total of 2KiB of data such that Corrade commands that produce data sets far larger than 2KiB would be truncated when received by the LSL script. Technically, sifting is implemented in Corrade using a set of map-reduce-like commands that act on the output produced by all commands.
| Sifts | Parameters | Description | Last Changes |
|---|---|---|---|
| count | a CSV string representing a regular expression (regex) and regular expression options | The count sift will count the number of items in a list that match a supplied regular expression. | None |
| distinct | the empty string | The distinct sift will return only unique elements in a list. | None |
| each | integer | The each sift will return a strided list given a supplied number. | None |
| jsonpath | a string representing a JSON path | The jsonpath sift will extract JSON elements matching the provided JSON path. | None |
| match | a string representing a regular expression | The match sift will match the whole returned list against a provided regular expression. | None |
| md5 | the empty string | The MD5 sift will generate an unsalted MD5 hash of the current data. | None |
| permute | an integer representing the number of rotations | The permute sift will rotate the elements of the list left or right a number of times depending on the provided parameter. | None |
| random | an integer representing a seed | The random sift will select a random element from the CSV list. | None |
| reverse | the empty string | The reverse sift will reverse the CSV list. | None |
| select | a string representing an element to match | The select will return the items following the provided element for all elements in the list. | None |
| sha1 | the empty string | The SHA1 sift will generate a SHA1 hash of the current data. | None |
| skip | integer | The skip sift will remove a supplied number of elements in a list from the start of the list. | None |
| take | integer | The take sift will reduce the list produced by a command to a supplied number of items. | None |
| xpath | a string representing a fully qualified XML path | The XPath sift will return all items matching an XML path. | None |