屋后的一亩三分绿色菜园地
Returns the number of characters in a string or the number of items in an array. size can also be used with dot notation (for example, {{ my_string.size }}). This allows you to use size inside tags such as conditionals.
Input
{{ "Ground control to Major Tom." | size }}
Output
28
Input
{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
{{ my_array | size }}
Output
4
Using dot notation:
{% if site.pages.size > 10 %}
This is a big website!
{% endif %}