Improve array and matrix display speed

[kojix2]

It may be time to rethink how iRuby displays arrays.

Matrix rendering with MathJax is beautiful. However, it is not appropriate when displaying large sized arrays or matrices. In the worst case, the browser freezes.

ruby-numo/numo-narray#124

[kojix2]

@zalt50 What do you think?

[prasunanand]

Cc @Uditgulati

[zalt50]

How about c2d55563a3a5ead26af02bb5b3b3ea1c3e0b3352? It makes an array clipped.

[kojix2]

I see.
I think it's very good.
I want to display the last number of each line/column if possible.

[mrkn]

I want to stop implicit use of MathJax for displaying the result.

[kojix2]

@prasunanand
Thank you .I am a fan of NArray.
Let me know if you have any feedback from NMatrix community.

@mrkn
I agree.

@zalt50 How about kojix2@b3f7ddc

[Uditgulati]

I think only showing first 5 and last rows and columns should be enough.

We are thinking of fixing this problem for NMatrix too during this GSoC.

[zalt50]

kojix2@b3f7ddc is nice for me, but some people don't need MathJax so is it possible to choose whether to use MathJax in runtime?

[kojix2]

Oops, It was discussed in the past #97

[kojix2]

Changed default display format for NArray to text/plain.
Thanks to everyone who commented.