Tera Built-in Filters (Continued)

The filter takes an array and returns a new array with the value(s) from the `with` parameter added. If the `with` parameter is an array, all of its values will be appended one by one to the new array and not as an array. This filter can also be used to append a single value to an array if the value passed to `with` is not an array: ```jinja2 {% set pages_id = pages_id | concat(with=id) %} ``` The `with` attribute is mandatory. #### urlencode Only available if the `builtins` feature is enabled. Percent-encodes all the characters in a string which are not included in unreserved chars (according to [RFC3986](https://tools.ietf.org/html/rfc3986)) with the exception of forward slash (`/`). Example: `{{ value | urlencode }}` If value is `/foo?a=b&c=d`, the output will be `/foo%3Fa%3Db%26c%3Dd`. `/` is not escaped. #### urlencode_strict Only available if the `builtins` feature is enabled. Similar to `urlencode` filter but encodes all non-alphanumeric characters in a string including forward slashes (`/`). Example: `{{ value | urlencode_strict }}` If value is `/foo?a=b&c=d`, the output will be `%2Ffoo%3Fa%3Db%26c%3Dd`. `/` is also encoded. #### abs Returns the absolute value Example: `{{ negative_number | abs }}` If negative_number is -1, the output will be 1. If num_messages is -2.0 the output will be 2. #### pluralize Returns a plural suffix if the value is not equal to ±1, or a singular suffix otherwise. The plural suffix defaults to `s` and the singular suffix defaults to the empty string (i.e. nothing). Example: `You have {{ num_messages }} message{{ num_messages | pluralize }}` If num_messages is 1, the output will be You have 1 message. If num_messages is 2 the output will be You have 2 messages. You can also customize the singular and plural suffixes with the `singular` and `plural` arguments to the filter: Example: `{{ num_categories }} categor{{ num_categories | pluralize(singular="y", plural="ies") }}` #### round Returns a number rounded following the method given. Default method is `common` which will round to the nearest integer. `ceil` and `floor` are available as alternative methods. Another optional argument, `precision`, is available to select the precision of the rounding. It defaults to `0`, which will round to the nearest integer for the given method. Example: `{{ num | round }} {{ num | round(method="ceil", precision=2) }}` #### filesizeformat Only available if the `builtins` feature is enabled. Returns a human-readable file size (i.e. '110 MB') from an integer. Example: `{{ num | filesizeformat }}` #### date Only available if the `builtins` feature is enabled. Parses a timestamp into a date(time) string. Defaults to `YYYY-MM-DD` format. Time formatting syntax is inspired from strftime and a full reference is available on [chrono docs](https://docs.rs/chrono/0.4/chrono/format/strftime/index.html). Example: `{{ ts | date }} {{ ts | date(format="%Y-%m-%d %H:%M") }}` If you are using ISO 8601 date strings or a UTC timestamp, you can optionally supply a timezone for the date to be rendered in. Example: ``` {{ "2019-09-19T13:18:48.731Z" | date(timezone="America/New_York") }} {{ "2019-09-19T13:18:48.731Z" | date(format="%Y-%m-%d %H:%M", timezone="Asia/Shanghai") }} {{ 1648252203 | date(timezone="Europe/Berlin") }} ``` Locale can be specified (excepted when the input is a timestamp without timezone argument), default being POSIX. (only available if the `date-locale` feature is enabled) Example: `{{ 1648252203 | date(format="%A %-d %B", timezone="Europe/Paris", locale="fr_FR") }}` #### escape Escapes a string's HTML. Specifically, it makes these replacements: - `&` is converted to `&` - `<` is converted to `<` - `>` is converted to `>` - `"` (double quote) is converted to `"` - `'` (single quote) is converted to `'` - `/` is converted to `/` #### escape_xml Escapes XML special characters. Specifically, it makes these replacements: - `&` is converted to `&`

This section continues describing Tera's built-in filters. It explains `concat` which appends value(s) to an array. Then `urlencode` and `urlencode_strict` are introduced which encode strings for use in URLs, with `urlencode_strict` encoding more characters. After this `abs` returns the absolute value. Then `pluralize` adds a plural suffix if the value is not equal to ±1. Following this is `round` which rounds a number to a given precision. The `filesizeformat` returns a human-readable file size. Then `date` parses a timestamp into a formatted date string, allowing for timezone specification and locale. Finally, `escape` and `escape_xml` are described, which escape HTML and XML special characters respectively.