Check row.magazines.length

It appears that row.magazines is an array. In which case checking the length of the array is necessary.
Check row.magazines.length

Updating python documentation per @neumino request
https://github.com/rethinkdb/docs/pull/397#issuecomment-47954597
Check row.magazines.length

Updating python documentation per @neumino request
https://github.com/rethinkdb/docs/pull/397#issuecomment-47954597
Merge pull request #397 from brettgriffin/patch-1

Fix for r.js - PR by @brettgriffin
Add link to during from between
Add info on subqueries
Clarifications; fixes #399
Typo fix. Closes #398
Merge branch 'issue-398-between-during'
Add quickstart and tech comparison images
Change to use new CSS class
Changing back to pure Markdown
Image shuffling based on feedback
Add quickstart and tech comparison images
Change to use new CSS class
Changing back to pure Markdown
Image shuffling based on feedback
Deleting technical comparison image
Modify intro to ReQL image
Updates to 10-minute guide images