jQuery helpers to help verify that your selectors are returning the expected number of elements. Usage is simple.
$( selector ).onlyOne()
If there is one and only one element matching the selector, then all is well! Otherwise, an error will be thrown. There is a corresponding helper to ensure at least one element found, cleverly named:
$( selector ).atLeastOne()
There are alternate spellings to suit your style:
$.one(selector) // Shortcut for $(selector).onlyOne()
$.many(selector) // Shortcut for $(selector).atLeastOne()
var collection = $(selector)
collection.findMany(selector) // Same as collection.find(selector).notEmpty()
collection.findOne(selector) // Same as collection.find(selector).onlyOne()