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Array map member function skips null values

Description

Scenario: call map() on an array that contains null values.

What I expected:
1) The new array should have the same length as the original array.
2) Each item in the new array should have the value returned from the map function.

What actually happened:
1) If the original array has nothing but null values, the new array has a length of 0.
2) If the original array contains a mix of null and non-null values, it is impossible to map the null values to a different value.

TryCF gist: https://trycf.com/gist/f586d22f312910ec1814b235522f97fe/lucee5?theme=monokai

a = [JavaCast("null", "")]; //a = [JavaCast("null", ""), ""]; b = a.map(function(item) { return "foo"; }); if (a.len() != b.len()) { writeoutput("Fail: array lengths should be the same"); } else if (IsNull(b[1])) { writeoutput("Fail: b[1] should be 'foo'"); } writedump(var=a, label="a"); writedump(var=b, label="b");

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David Rogers 2 February 2023 at 17:08

this also affects array.every

Pothys - MitrahSoft 18 October 2019 at 10:08

I've added a test case and confirmed the issue that happened on lucee. In lucee ignores the null value. But ACF includes the null value.

Pull Request: https://github.com/lucee/Lucee/pull/775

Ryan Deba 17 October 2019 at 13:47

Label added slightly smiling face

Zac Spitzer 17 October 2019 at 12:58

As this works on ACF 2018, can you add the acf-compat label?

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Created 16 October 2019 at 21:39
Updated 6 March 2025 at 11:28

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