Like filter , map evaluates the string passed as its second argument, passing each list element in turn, via v: val.
和filter一样,map计算作为第二个参数传递的字符串,并且通过v:val传递每个列表元素。
The call to map walks through each value, aliases it to v: val, evaluates the expression in the string, and replaces the value with the result of that expression.
调用map可以遍历各个值,将其作为别名赋给v:val,在字符串中计算表达式,并用表达式结果替换值。
The filter function works much the same way as for lists, except that in addition to testing each entry's value using v: val, you can also test its key using v: key. For example.
filter函数的工作方法和列表中的相同,除了用v:val来检测各条目的值,您还可以用v:key来检测它的键。
The filter function works much the same way as for lists, except that in addition to testing each entry's value using v: val, you can also test its key using v: key. For example.
filter函数的工作方法和列表中的相同,除了用v:val来检测各条目的值,您还可以用v:key来检测它的键。
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