StructReduce

Last updated on May 30, 2024 | Also applies to ColdFusion

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CFML Reference

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CFML Reference User Guide
ColdFusion functions
ColdFusion tags
1. ColdFusion tag summary
2. ColdFusion tags by category
  1. Application framework tags
    1. cfapplication
    2. cfassociate
    3. cferror
    4. cfimport
    5. cfinterface
    6. cflock
    7. cfscript
    8. cfthread
  2. Communications tags
  3. Database manipulation tags
  4. Data output tags
    1. cfchart
  5. Debugging tags
    1. cfdump
    2. cftimer
    3. cftrace
  6. Exception handling tags
    1. cfcatch
    2. cferror
    3. cffinally
    4. cfrethrow
    5. cfthrow
    6. cftry
  7. Extensibility tags
    1. cfchart
    2. cfchartdata
    3. cfchartseries
    4. cfcollection
    5. cfcomponent
    6. cfexecute
    7. cfftp
    8. function
    9. cfindex
    10. cfinterface
    11. cfinvoke
    12. cfinvokeargument
    13. cfobject
    14. cfproperty
    15. cfreport
    16. cfreportparam
    17. cfreturn
    18. cfsearch
    19. cfsharepoint
    20. cfspreadsheet
    21. cfwddx
    22. cfxml
  8. File management tags
    1. cfdirectory
    2. cffile
    3. cffileupload
    4. cfftp
    5. cfzip
    6. cfzipparam
  9. Flow-control tags
    1. cfabort
    2. cfbreak
    3. cfcase
    4. cfcontinue
    5. cfdefaultcase
    6. cfelse
    7. cfelseif
    8. cfexecute
    9. cfexit
    10. cfif
    11. cfinclude
    12. cflocation
    13. cfloop
    14. cfrethrow
    15. cfswitch
    16. cfthrow
    17. cftry
  10. Forms tags
    1. cfapplet
    2. cfcalendar
    3. cffileupload
    4. cfform
    5. cfformgroup
    6. cfformitem
    7. cfgrid
    8. cfgridcolumn
    9. cfgridrow
    10. cfgridupdate
    11. cfinput
    12. cfpdf
    13. cfpdfform
    14. cfpdfformparam
    15. cfpdfparam
    16. cfpdfsubform
    17. cfselect
    18. cfslider
    19. cftextarea
    20. cftree
    21. cftreeitem
  11. Internet Protocol tags
    1. cfajaximport
    2. cfajaxproxy
    3. cfftp
    4. cffeed
    5. cfimap
    6. cfhttp
    7. cfhttpparam
    8. cfldap
    9. cfmail
    10. cfmailparam
    11. cfmailpart
    12. cfpop
    13. cfsprydataset
  12. Page processing tags
    1. cfcache
    2. cfcontent
    3. cfflush
    4. cfheader
    5. cfhtmlhead
    6. cfinclude
    7. cfprocessingdirective
    8. cfsetting
    9. cfsilent
  13. Security tags
  14. Variable manipulation tags
    1. cfcookie
    2. cfdump
    3. cfparam
    4. cfregistry
    5. cfsavecontent
    6. cfschedule
    7. cfset
    8. cfsetting
  15. Other tags
    1. cfimage
    2. cflog
    3. cfregistry
3. Tags a-b
4. Tags c
5. Tags f
6. Tags g-h
  1. cfgraph
  2. cfgraphdata
  3. cfgrid
  4. cfgridcolumn
  5. cfgridrow
  6. cfgridupdate
  7. cfheader
  8. cfhtmlhead
  9. cfhtmltopdf
  10. cfhtmltopdfitem
  11. cfhttp
  12. cfhttpparam
7. Tags i
  1. cfif
  2. cfimage
  3. cfimap
  4. cfimapfilter
  5. cfimpersonate
  6. cfimport
  7. cfinclude
  8. cfindex
  9. cfinput
  10. cfinsert
  11. cfinterface
  12. cfinvoke
  13. cfinvokeargument
8. Tags j-l
9. Tags m-o
10. Tags p-q
  1. cfparam
  2. cfpdf
  3. cfpdfform
  4. cfpdfformparam
  5. cfpdfparam
  6. cfpdfsubform
  7. cfpod
  8. cfpop
  9. cfpresentation
  10. cfpresentationslide
  11. cfpresenter
  12. cfprint
  13. cfprocessingdirective
  14. cfprocparam
  15. cfprocresult
  16. cfprogressbar
  17. cfproperty
  18. cfquery
  19. cfqueryparam
11. Tags r-s
  1. cfregistry
  2. cfreport
  3. cfreportparam
  4. cfrethrow
  5. cfreturn
  6. cfsavecontent
  7. cfschedule
  8. cfscript
  9. cfsearch
  10. cfselect
  11. cfservlet
  12. cfservletparam
  13. cfset
  14. cfsetting
  15. cfsharepoint
  16. cfsilent
  17. cfslider
  18. cfspreadsheet
  19. cfsprydataset
  20. cfstoredproc
  21. cfswitch
12. Tags t
  1. cftable
  2. cftextarea
  3. cftextinput
  4. cfthread
  5. cfthrow
  6. cftimer
  7. cftooltip
  8. cftrace
  9. cftransaction
  10. cftree
  11. cftreeitem
  12. cftry
13. Tags u-z
  1. cfupdate
  2. cfwddx
  3. cfwebsocket
  4. cfwindow
  5. cfxml
  6. cfzip
  7. cfzipparam
CFML Reference
1. Reserved words and variables
2. Ajax JavaScript functions
3. ColdFusion ActionScript functions
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7. ColdFusion Flash Form style reference
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10. ColdFusion Java CFX reference
11. WDDX JavaScript Objects
Cloud services

Description

Iterates over every entry of the struct and calls the closure to work on the key value pair of the struct.

Returns

Any

Syntax

StructReduce(struct, function(result, key, value [,struct]), initialVal)

StructReduce(struct, function(result, key, value [,struct]), initialVal)

History

ColdFusion 11: Added this function.

Parameters

Parameter	Req/Opt	Description
struct	Required	The input struct.
function	Required	Closure or a function reference that will be called for each of the iteration. The arguments passed to the callback are result: the result of the reduce operation after the previous iteration key: key for the current iteration value: the value for the current iteration struct: a reference of the original struct
initialVal	Optional	Initial value that will be used for the reduce operation. The type is any.

Parameter

Req/Opt

Default

Description

struct

Required

The input struct.

function

Required

Closure or a function reference that will be called for each of the iteration. The arguments passed to the callback are

result: the result of the reduce operation after the previous iteration
key: key for the current iteration
value: the value for the current iteration
struct: a reference of the original struct

initialVal

Optional

Initial value that will be used for the reduce operation. The type is any.

Example

person=StructNew();

person = {fname="John", lname="Doe"};

ucaseStruct = structMap(person, function(key, value)

{

return ucase(value);

});

writeDump(ucaseStruct);

concatValues = structReduce(person, function(result, key, value)

{

result = result?:"";

result&= value & " ";

return result;

});

writeDump(concatValues);

</cfscript>

<cfscript> person=StructNew(); person = {fname="John", lname="Doe"}; ucaseStruct = structMap(person, function(key, value) { return ucase(value); }); writeDump(ucaseStruct); concatValues = structReduce(person, function(result, key, value) { result = result?:""; result&= value & " "; return result; }); writeDump(concatValues); </cfscript>

<cfscript>
       person=StructNew();
       person = {fname="John", lname="Doe"};

       ucaseStruct = structMap(person, function(key, value)
       {
             return ucase(value);
       });
       writeDump(ucaseStruct);

       concatValues = structReduce(person, function(result, key, value)
       {
             result = result?:"";
             result&= value & " ";
             return result;
       });

       writeDump(concatValues);
</cfscript>

Output

Using member function

myStruct=StructNew();

myStruct={a=1,b=2,c=3,d=4,e=5};

myReduce=myStruct.reduce(function(result,key,value){

return result+value;

},10);

WriteDump(myReduce); // Returns 25

</cfscript>

<cfscript> myStruct=StructNew(); myStruct={a=1,b=2,c=3,d=4,e=5}; myReduce=myStruct.reduce(function(result,key,value){ return result+value; },10); WriteDump(myReduce); // Returns 25 </cfscript>

<cfscript>
       myStruct=StructNew();
       myStruct={a=1,b=2,c=3,d=4,e=5};
       myReduce=myStruct.reduce(function(result,key,value){
             return result+value;
       },10);
       WriteDump(myReduce); // Returns 25
</cfscript>

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StructReduce

Description

Returns

Syntax

History

Parameters

Example

Output

Using member function

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