Change jquery datatables default row count shown

Question

By default, datatables has 4 sizes of records to show: 10,25,50,100.

A) Is there a way to change this? I tried editing the jquery file to change the array to [30,60,90,120] itself and this destroyed it.

B) Is there a way to set the default selection size say to 50 (instead of 10) of this selector upon initializing when jquery builds it?

I can't find either of these items in the documentation.

Answer 1

[Update because this answer seems to get some views] --

Updated Answer:

In later versions (I believe 1.10+), the API naming conventions changed, ditching the Hungarian notation. I believe the old conventions are aliased for compatibility, but the current conventions are:

lengthMenu
pageLength

Thus, the updated answers are:

A) it's the lengthMenu parameter: https://datatables.net/reference/option/lengthMenu

For example, here's how I have one of mine set:

"lengthMenu": [[10, 25, 50, 100, 200, -1], [10, 25, 50, 100, 200, "All"]],

B) pageLength https://datatables.net/reference/option/pageLength -- optionally set this to whatever your default should be.

"pageLength" : 25,

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Original Answer

A) It's the aLengthMenu parameter: http://datatables.net/ref#aLengthMenu

For example, here's how I have one of mine set:

"aLengthMenu": [[10, 25, 50, 100, 200, -1], [10, 25, 50, 100, 200, "All"]],

B) iDisplayLength -- set this parameter to whatever your default should be