join
将数组中的各个字符串合并为一个字符串，并将 split 参数作为字符串之间的分隔符。
输入
{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}
{{ beatles | join: " and " }}
输出
John and Paul and George and Ringo
将数组中的各个字符串合并为一个字符串，并将 split 参数作为字符串之间的分隔符。
输入
{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}
{{ beatles | join: " and " }}
输出
John and Paul and George and Ringo