freemarker中定义数组

开始以下面的方式定义：

<#assign configArr[] />
<#assign configArr[0]=['北京','010']/>
<#assign configArr[1]=['上海','021']/>

<#list configArr as it>
   ${it[0]}   ${it[1]}
</#list>

报错：
Exception in thread "main" freemarker.core.ParseException: Encountered "[" at line 1, column 19 in freemarker.ftl.
Was expecting one of:
    "=" ...
    "in" ...
    ">" ...

解决：
<#assign configArr = [
['北京','010'],
['上海','021']
] >

<#list configArr as it>
${it[0]}   ${it[1]}
</#list>
正确输出了：
北京   010
上海   021