Implement all filters

Filters

• abs
• append
• capitalize
• ceil
• compact
• date
• default
• divided_by
• downcase
• escape
• escape_once
• first
• floor
• join
• last
• lstrip
• map
• minus
• modulo
• newline_to_br
• plus
• prepend
• remove
• remove_first
• replace
• replace_first
• reverse
• round
• rstrip
• size
• slice
• sort
• sort_natural
• split
• strip
• strip_html
• strip_newlines
• times
• truncate
• truncatewords
• uniq

[exts]

Going to try helping where I can :), already did my first PR for downcase.

Thanks for your contribution 🍰

[exts]

As for the map filter, I don't think that's possible in crystal since you can't call properties/methods dynamically unless you know a way to do it with macros?

Using the [] operator can be a solution, but it means that the map filter will be restricted to hash :/

[exts]

Maybe this could be a reason for them to support this feature in the language? I ran into a similar issue when trying to create php style dynamic controller/actions as well and was forced to use a single method as the solution :/

I almost had a breakthrough though, basically i found out that constant arrays can be used dynamically in {% for ... %}{% end %} macros, only problem is idk how to create a single value array constant at compile time w/ the data we'd need to run that loop.

[exts]

actually now looking at the liquid source, it looks like they only really support Enumerable's w/ the map option that responds to []

Guess like you said, that'll have to do for now.

My current solution: exts@c03a643 will push later once I add more filters.