在数组高速缓存系统间查找值

时间:2018-02-06 11:30:57

标签: arrays intersystems-cache mumps

我希望有人可以帮助我试图找到一种方法来找到像PHP in_array这样存在的数组中的值。

我有两个变量PTOWNADDRESS。我想找出PTOWN是否在数组中的任何位置?

3 个答案:

答案 0 :(得分:0)

您在寻找if $data(ADDRESS("street 1")) write "found"吗?

答案 1 :(得分:0)

您是否在键或节点值中寻找PTOWN?如果可以在中找到PTOWN,则可以使用$ ORDER查找与您拥有的内容最匹配的内容。假设你有一个这样的数组:

new PTOWN,Address,Array
set PTOWN="Paris"
set Address="Some address"
;
set Array("Paris")="123 Avenue Louis Pasteur"
set Array("Madrid")="434 Calle De Duermos"
set Array("Boston")="1522 Market Street"
;
if $ORDER(Array(PTOWN))=PTOWN d
    ...

$ORDER将返回与您的搜索字词最匹配的密钥,并且也会在MUMPS的订购系统中返回。因此$ORDER(Array("Pa"))返回“Paris”,$ORDER(Array("Mad"))返回“Madrid”,$ORDER(Array("Alameda"))返回“Boston”,因为“Boston”是数组中“Alameda”之后的下一个内容。

您也可以使用它循环遍历数组中的所有键:

new nodeName
set nodeName="" ; you have to pass $ORDER "" to get the first thing in the array
;
for  set nodeName=$ORDER(Array(nodeName)) quit:nodeName=""  d 
    ; $ORDER returns "" when you pass it the *last* key in the array, so we can quit this loop when we get that back
    ;
    if nodeName=PTOWN write Array(nodeName)

如果在数组的值中找到PTOWN,则必须使用循环方法。

答案 2 :(得分:0)

假设PTOWN为“ $ needle”,地址为“ $ haystack”(根据in_array文档),并且不知道数组格式,那么您可以做的最好的事情如下:

in_array(needle,haystack)
    NEW idx,found,subAry
    SET found=0 ; If you want to return 0 instead of "" if not found
    ;
    FOR $ORDER(haystack(idx)) QUIT:idx="" DO  QUIT:found
    . ; If the format of the array is: array(<index>)=<value>
    . IF haystack(idx)=needle SET found=1 QUIT
    . ;
    . ; If the format of the array is: array(<key>)=<value>
    . ; Note: this type of search can be made a bit more efficient, but we're brute-forcing here
    . IF idx=haystack SET found=1 QUIT
    . ;
    . ; If you're using nested keys and values...this is NOT recommended since Cache doesn't really support recursion
    . MERGE subAry=haystack(idx)
    . SET found=$$in_array(needle,subAry)
    ;
    QUIT found

您可以这样称呼它:

...=$$in_array(PTOWN,.ADDRESS) ; Don't forget to pass by reference!