> For the complete documentation index, see [llms.txt](https://boxlang.ortusbooks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structfindkey.md). # StructFindKey Searches a struct for a given key and returns an array of values ## Method Signature ``` StructFindKey(struct=[structloose], key=[any], scope=[string]) ``` ### Arguments | Argument | Type | Required | Description | Default | | -------- | -------- | -------- | -------------------------------------------------------------------------------- | ------- | | `struct` | `struct` | `true` | The struct to search | | | `key` | `any` | `true` | The key to search for | | | `scope` | `string` | `false` | Either one (default), which finds the first instance or all to return all values | `one` | ## Examples ### Find first match for a nested struct key [Run Example](https://try.boxlang.io/?code=eJxl0cuKwjAUBuB18xSHrCp0420z4qLOeB2t0voCUQ8aqImkpwwd8d3nFBlsze7kJ3z5k0xQUY4FjOEOIthN02ybdOED7iIIll88dCOeZss02yfxZsqBXNmLkXW6jl%2FhGo2xRorgEf0zvSbT85idKnOP2Rw%2FlSODVUvqN6W%2BJ83RujN61kI5p4u3UsMmNfSo%2BHDgs9%2Bl1KpTSxk0lYGnpNqcradkxIVqRjxG4lp9Y8WvXpArjzTT5sTrECbP74hA5qqgRF35WiCtQQmdkfhxmnBb0q2kEFbcI0OnVa5%2FMYQn2Km3%2FQHUr3Wf) ```java Beatles = { PERSON1 : { ID : 1, FIRSTNAME : "John", LASTNAME : "Lennon" }, PERSON2 : { ID : 2, FIRSTNAME : "Paul", LASTNAME : "McCartney" }, PERSON3 : { ID : 3, FIRSTNAME : "George", LASTNAME : "Harrison" }, PERSON5 : { ID : 5, FIRSTNAME : "Abbey", LASTNAME : "Road" }, PERSON4 : { ID : 4, FIRSTNAME : "Ringo", LASTNAME : "Starr" } }; myKey = structFindKey( Beatles, "lastName", "one" ); writeOutput( JSONSerialize( myKey ) ); ``` Result: \[{"path":".PERSON3.LASTNAME","owner":{"LASTNAME":"Harrison","FIRSTNAME":"George","ID":3},"value":"Harrison"}] ### Find all matches of a nested struct key [Run Example](https://try.boxlang.io/?code=eJxl0MsKwjAQBdB18xVDVhW6aXWluPBR31Zp%2FYGgQw3EVNIpUsV%2FN0XEanYzl%2BFwmTEKUljCEB7AvH2cZrskhD48mOctp3YIAzvNlml2SEbb2AZ8VZw1b9LN6BtuUOtCc%2BY9gw8TtZnIYfaiUg6zPU6EIY31j9RtS11HmmNhcnSshTBGln%2Blem2q51Cp1HnhSBlZqmHYc8Au9Rpr%2B6%2BSTHWkmdQnu%2Fswfj8yAK5ESYm42ELAhVIcOgN2M5JwV9G1Ih9WtkeGRgol7%2BjDG%2Bw0Zy%2BSL2X7) ```java Beatles = { PERSON1 : { ID : 1, FIRSTNAME : "John", LASTNAME : "Lennon" }, PERSON2 : { ID : 2, FIRSTNAME : "Paul", LASTNAME : "McCartney" }, PERSON3 : { ID : 3, FIRSTNAME : "George", LASTNAME : "Harrison" }, PERSON4 : { ID : 4, FIRSTNAME : "Ringo", LASTNAME : "Starr" } }; myKey = structFindKey( Beatles, "lastName", "all" ); writeOutput( JSONSerialize( myKey ) ); ``` Result: \[{"path":".PERSON3.LASTNAME","owner":{"LASTNAME":"Harrison","FIRSTNAME":"George","ID":3},"value":"Harrison"},{"path":".PERSON1.LASTNAME","owner":{"LASTNAME":"Lennon","FIRSTNAME":"John","ID":1},"value":"Lennon"},{"path":".PERSON2.LASTNAME","owner":{"LASTNAME":"McCartney","FIRSTNAME":"Paul","ID":2},"value":"McCartney"},{"path":".PERSON4.LASTNAME","owner":{"LASTNAME":"Starr","FIRSTNAME":"Ringo","ID":4},"value":"Starr"}] ### Find first match for a nested struct key using member function Calling the findKey member function on a struct. [Run Example](https://try.boxlang.io/?code=eJxl0MsKwjAQBdB18xVDVhVE8LVRXNT3s0rrD0QdNVATSVOkiv%2FuFBGr2Q2XcOZm%2Bihsgin04AHM24yieB3WoQMP5nmzIQ31Kk3jWRRvw2A1ooDP9VnxIl0G33CJSmnFmfesfphGmWk4zEZkicOs9gNhrML8R2qWpaYjTVCbEzrWVBgj079S7TLVdqhgt6Pd%2F1KkxeFHaZWVlqNEUp20o8SWChUMe3bZJV9gTlfvv%2B9fO0p1oMQHnojUhuJC%2FwGuFXKodNnNSIvrzF4z68OcCsRopEjkHX14S5Xi2QuE5nL8) ```java Beatles = { PERSON1 : { ID : 1, FIRSTNAME : "John", LASTNAME : "Lennon" }, PERSON2 : { ID : 2, FIRSTNAME : "Paul", LASTNAME : "McCartney" }, PERSON3 : { ID : 3, FIRSTNAME : "George", LASTNAME : "Harrison" }, PERSON5 : { ID : 5, FIRSTNAME : "Abbey", LASTNAME : "Road" }, PERSON4 : { ID : 4, FIRSTNAME : "Ringo", LASTNAME : "Starr" } }; myKey = Beatles.findKey( "lastName", "one" ); writeOutput( JSONSerialize( myKey ) ); ``` Result: \[{"path":".PERSON3.LASTNAME","owner":{"LASTNAME":"Harrison","FIRSTNAME":"George","ID":3},"value":"Harrison"}] ### Additional Examples [Run Example](https://try.boxlang.io/?code=eJxtkM1qwzAQhM%2FWUwy6xAZD7i0%2BmPQHU2hKVQj0piZKIiJLxZIb0pB379pWMW5z0%2B7OzjcraXUtjUeBM1iyWK5wgzNLkudlJe7pzWvneE4NUb33tZHNTnGWXKj5Uj3%2BlTttD3G6KN%2F%2BmSl3nLh5gptOzy63bD6H2LsjqAU55GJ3bf2ZwsgPZQpejgOe40s2RayQ9dsP2m7AO8coS32GtbNBaqvtDgd1gtti5vW3mrEtqcthf6XDXlCTvkGEpl2HzulJndJfXE5RaU7UwT4b0zbKtyZ4aIsrjtMDXqOWQkw5I2bgdKCexLN46bW0lOIHxuKHjg%3D%3D) ```java animals = { COW : { NOISE : "moo", SIZE : "large" }, PIG : { NOISE : "oink" }, CAT : { NOISE : "meow", SIZE : "small" } }; // Show all animals Dump( label="All animals", var=animals ); // Find "all" animal(s) containing key of 'size' findAnimalsWithSize = StructFindKey( animals, "size", "all" ); // Show results in findAnimalsWithSize Dump( label="Results of StructFindKey(animals, ""size"", ""all"")", var=findAnimalsWithSize ); ``` ## Related * [StructAppend](/boxlang-language/reference/built-in-functions/struct/structappend.md) * [StructClear](/boxlang-language/reference/built-in-functions/struct/structclear.md) * [StructCopy](/boxlang-language/reference/built-in-functions/struct/structcopy.md) * [StructDelete](/boxlang-language/reference/built-in-functions/struct/structdelete.md) * [StructEach](/boxlang-language/reference/built-in-functions/struct/structeach.md) * [StructEquals](/boxlang-language/reference/built-in-functions/struct/structequals.md) * [StructEvery](/boxlang-language/reference/built-in-functions/struct/structevery.md) * [StructFilter](/boxlang-language/reference/built-in-functions/struct/structfilter.md) * [StructFind](/boxlang-language/reference/built-in-functions/struct/structfind.md) * [StructFindValue](/boxlang-language/reference/built-in-functions/struct/structfindvalue.md) * [StructGet](/boxlang-language/reference/built-in-functions/struct/structget.md) * [StructGetMetadata](/boxlang-language/reference/built-in-functions/struct/structgetmetadata.md) * [StructInsert](/boxlang-language/reference/built-in-functions/struct/structinsert.md) * [StructIsCaseSensitive](/boxlang-language/reference/built-in-functions/struct/structiscasesensitive.md) * [StructIsOrdered](/boxlang-language/reference/built-in-functions/struct/structisordered.md) * [StructKeyArray](/boxlang-language/reference/built-in-functions/struct/structkeyarray.md) * [StructKeyExists](/boxlang-language/reference/built-in-functions/struct/structkeyexists.md) * [StructKeyList](/boxlang-language/reference/built-in-functions/struct/structkeylist.md) * [StructKeyTranslate](/boxlang-language/reference/built-in-functions/struct/structkeytranslate.md) * [StructMap](/boxlang-language/reference/built-in-functions/struct/structmap.md) * [StructNew](/boxlang-language/reference/built-in-functions/struct/structnew.md) * [StructNone](/boxlang-language/reference/built-in-functions/struct/structnone.md) * [StructReduce](/boxlang-language/reference/built-in-functions/struct/structreduce.md) * [StructSome](/boxlang-language/reference/built-in-functions/struct/structsome.md) * [StructSort](/boxlang-language/reference/built-in-functions/struct/structsort.md) * [StructToQueryString](/boxlang-language/reference/built-in-functions/struct/structtoquerystring.md) * [StructToSorted](/boxlang-language/reference/built-in-functions/struct/structtosorted.md) * [StructUpdate](/boxlang-language/reference/built-in-functions/struct/structupdate.md) * [StructValueArray](/boxlang-language/reference/built-in-functions/struct/structvaluearray.md) --- # Agent Instructions This documentation is published with GitBook. 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