Implement missing filters

[johannhof]

Feel free to grab any of those and implement! Creating filters is really straightforward, you can find more info in the README and look at the existing filters

• append - append a string e.g. {{ 'foo' | append:'bar' }} #=> 'foobar'
• capitalize - capitalize words in the input sentence
• ceil -
• date - reformat a date (syntax reference)
• divided_by - integer division e.g. {{ 10 | divided_by:3 }} #=> 3
• downcase - convert an input string to lowercase
• escape - escape a string
• escape_once - returns an escaped version of html without affecting existing escaped entities
• first - get the first element of the passed in array
• floor -
• join - join elements of the array with certain character between them
• last - get the last element of the passed in array
• map - map/collect an array on a given property
• minus - subtraction e.g. {{ 4 | minus:2 }} #=> 2
• modulo - remainder, e.g. {{ 3 | modulo:2 }} #=> 1
• newline_to_br - replace each newline (\n) with html break
• pluralize - return the second word if the input is not 1, otherwise return the first word e.g. {{ 3 | pluralize: 'item', 'items' }} #=> 'items'
• plus - addition e.g. {{ '1' | plus:'1' }} #=> 2, {{ 1 | plus:1 }} #=> 2
• prepend - prepend a string e.g. {{ 'bar' | prepend:'foo' }} #=> 'foobar'
• remove_first - remove the first occurrence e.g. {{ 'barbar' | remove_first:'bar' }} #=> 'bar'
• remove - remove each occurrence e.g. {{ 'foobarfoobar' | remove:'foo' }} #=> 'barbar'
• replace_first - replace the first occurrence e.g. {{ 'barbar' | replace_first:'bar','foo' }} #=> 'foobar'
• replace - replace each occurrence e.g. {{ 'foofoo' | replace:'foo','bar' }} #=> 'barbar'
• reverse - reverse sort the passed in array
• round - rounds input to the nearest integer or specified number of decimals
• size - return the size of an array or string
• slice - slice a string. Takes an offset and length, e.g. {{ "hello" | slice: -3, 3 }} #=> llo
• sort - sort elements of the array
• split - split a string on a matching pattern e.g. {{ "ab" | split:"" }} #=> ['a','b']
• strip_html - strip html from string
• strip_newlines - strip all newlines (\n) from string
• times - multiplication e.g {{ 5 | times:4 }} #=> 20
• truncate - truncate a string down to x characters. It also accepts a second parameter that will append to the string e.g. {{ 'foobarfoobar' | truncate: 5, '.' }} #=> 'foob.'
• truncatewords - truncate a string down to x words
• upcase - convert an input string to uppercase
• abs
• compact
• default
• lstrip
• rstrip
• sort_natural
• strip
• uniq

[fiji-flo]

missing filters from liquid:

• abs
• compact
• default
• lstrip
• rstrip
• sort_natural
• strip
• uniq

[johannhof]

Thanks! I'll add them to the initial list.

[epage]

Quick reference to make it easy to finish off the last ones

url_encode

• source: https://github.com/Shopify/liquid/blob/master/lib/liquid/standardfilters.rb#L44
• test: https://github.com/Shopify/liquid/blob/25c7b05916dd6eae8d824e195e0381a7120f37d5/test/integration/standard_filter_test.rb#L139

url_decode

• source: https://github.com/Shopify/liquid/blob/master/lib/liquid/standardfilters.rb#L48
• test: https://github.com/Shopify/liquid/blob/25c7b05916dd6eae8d824e195e0381a7120f37d5/test/integration/standard_filter_test.rb#L144

sort_natural

• source: https://github.com/Shopify/liquid/blob/master/lib/liquid/standardfilters.rb#L140
• test:
  • https://github.com/Shopify/liquid/blob/64fca66ef5dfd7cf1acef0a7b8cdd825756eb681/test/integration/filter_test.rb#L86
  • https://github.com/Shopify/liquid/blob/25c7b05916dd6eae8d824e195e0381a7120f37d5/test/integration/standard_filter_test.rb#L203

map

• source: https://github.com/Shopify/liquid/blob/master/lib/liquid/standardfilters.rb#L174
• test: https://github.com/Shopify/liquid/blob/25c7b05916dd6eae8d824e195e0381a7120f37d5/test/integration/standard_filter_test.rb#L242

compact

• source: https://github.com/Shopify/liquid/blob/master/lib/liquid/standardfilters.rb#L188
• test:
  • https://github.com/Shopify/liquid/blob/64fca66ef5dfd7cf1acef0a7b8cdd825756eb681/test/integration/filter_test.rb#L101
  • https://github.com/Shopify/liquid/blob/25c7b05916dd6eae8d824e195e0381a7120f37d5/test/integration/standard_filter_test.rb#L230

concat

• source: https://github.com/Shopify/liquid/blob/master/lib/liquid/standardfilters.rb#L227
• concat: https://github.com/Shopify/liquid/blob/25c7b05916dd6eae8d824e195e0381a7120f37d5/test/integration/standard_filter_test.rb#L493