std.uni.toLowerCase / .toUpperCase

[Jacob Carlborg via Digitalmars-d]

On 24/06/15 22:07, Suliman wrote:

> If not to look at docs I would say that size is bite size, count -
> number of elements. So what is length I can't say. Probably I missed
> length and count.

"length" and "size" are the exact same thing. They return the number of 
elements of an array or string. "count" is a bit more versatile, it can 
be called without parameters, with one parameter or with a block. If a 
parameter is given it will count the number of occurrences of that 
element. If a block is given it will pass each element to the block and 
count how many times it returns true. If no parameter or block is given 
it will work exactly like "length" and "size".

It gets event more interesting if you add ActiveRecord to the mix. The 
result of a query in ActiveRecord will return some form of object that 
acts like an array. Example:

Person.where(name: 'John').length

Will get all rows matching "John" and return how many. This on the other 
hand:

Person.where(name: 'John').count

Will actually perform a count query, avoid loading all objects in memory.

-- 
/Jacob Carlborg