Looping over an array nested within a structure

Question

This is some data being returned by an API. I need to loop over the arrays that are contained within the nested structure. For example in the image below the savedMajorIds:

isArray(apiprofile.result.savedMajorIds)

returns Yes, so I'm pretty sure it's looking at the right thing. However, when I try to loop over it to get the values it breaks. Code is:

for (i=1, i < arrayLen(apiprofile.result.savedMajorIds),i=i+1) {
        writeOutput(apiprofile.result.savedMajorIds[i]);
    }

Error log doesn't like the arrayLen() portion but so far I've been unable to get that to work.

What version of ColdFusion?

Shawn
– Shawn

2018-10-26 15:29:26 +00:00
Commented Oct 26, 2018 at 15:29 — Shawn
– Shawn, Commented Oct 26, 2018 at 15:29

Steve · Accepted Answer · 2018-10-25 18:41:54Z

4

For anyone else who stumbles on this:

(i=1, i < arrayLen(apiprofile.result.savedMajorIds),i=i+1)

needs to be

(i=1; i < arrayLen(apiprofile.result.savedMajorIds); i=i+1)

or

(i=1; i < arrayLen(apiprofile.result.savedMajorIds); i++)

answered Oct 25, 2018 at 18:41

Steve

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2 Comments

Alex Over a year ago

(He replaced comma , with semicolon ;.)

Alex Over a year ago

For future reference, you can also use the foreach-syntax: for (id in apiprofile.result.savedMajorIds) { }

Shawn · Accepted Answer · 2018-10-26 16:30:42Z

3

Here are a few options, depending on your version of ColdFusion.

if (isArray(apiprofile.result.savedMajorIDs)) {
    // For/In Loop on Array - Possibly CF9, Definitely CF10+ (Verify version) 
    // Note: x will leak unless var'ed inside function.
    for ( x IN apiprofile.result.savedMajorIDs ) {
        writeoutput( x & "<br>" ) ;
    }

    // ArrayEach - CF10+ > Note: y will not leak.
    ArrayEach(apiprofile.result.savedMajorIDs, function(y){writeoutput(y & "<br>");}) ;

    // Member Function .each() - CF11+  > Note: z will not leak.
    apiprofile.result.savedMajorIDs.each( function(z){writeoutput(z & "<br>");}) ;
}

https://trycf.com/gist/f6f3e64635e4b72da15521a3d49d485f/acf11?theme=monokai

answered Oct 26, 2018 at 16:30

Shawn

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1 Comment

Shawn Over a year ago

Doing some testing with various methods, the for/in loop seems to be significantly faster than other methods. That holds for Lists, Arrays, Structs and especially Queries.

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