谷神后端list转map

list转map

/*** list2map* list转map：支持全量映射、单字段映射。* * @param $list:list:列表。* @param $key:string:键。* @param $field:string:值字段域。** @return map**/ 
#function list2map($list, $key, $field)#if ($vs.util.isList($list) and $vs.util.isString($key))#set($map = $vs.util.newMap())#foreach($row in $list)#set($value = $row)#if (!$vs.util.isNull($field))#set($value = $row.get($field))#end$map.put($row.get($key), $value)#endreturn $map#endreturn null
#end

// list2map
#set($map = @list2map($list, $key, $field))

list转map：动态脚本模式

/*** list2mapByScript* list转map：动态脚本模式。 ** @param $list:list:列表。* @param $key:string:键。* @param $field:string:值字段域。** @return map**/
#function list2mapByScript($list, $key, $field)#if ($vs.util.isList($list) and $vs.util.isString($key))#set($map = $vs.util.newMap())#foreach($row in $list)#set($value = $row)#if (!$vs.util.isNull($field))#set($value = $row.get($field))#end#set($script = 'return $row.' + $key)$map.put($vs.proc.executeScript($script, $vs.util.newMap('row', $row)), $value)#endreturn $map#endreturn null
#end

// list2mapByScript
#set($map = @list2mapByScript($list, $key, $field))

list转map：高阶函数

/*** list2mapByFun* list转map：高阶函数。* * @param $list:list:列表。* @param $keyFun:map:键函数。* @param $valueFun:map:值函数。** @return map**/ 
#function list2mapByFun($list, $keyFun, $valueFun)#if ($vs.util.isList($list) and $vs.util.isMap($keyFun))#set($map = $vs.util.newMap())#foreach($row in $list)#set($value = $row)#if ($vs.util.isMap($valueFun))#set($value = $valueFun.fun($row))#end$map.put($keyFun.fun($row), $value)#endreturn $map#endreturn null
#end

// list2mapByFun
#set($map = @list2mapByFun($list, $vs.util.newMap('fun', @keyFun), $vs.util.newMap('fun', @valueFun)))