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this is trying to modify the filters _in-place_ if you use lodash it creates a copy of the collection (in this case, the collection is the filter array) so when you assign it at the end it is truly a separate copy of the filters.

in your example above, `oFilters` and `search.oFilters` always are the same reference

ok, but `filter/map` is probably better suited, to what you're actually doing as it gives you a new array and allows you to modify

I just searched my code and I was using search.filterExpression.  It's possible search.filters behaves differently.

yes, I noticed `search.filterExpression` is documented as well in help

and since that is supposed to be a normal array of arrays it should be (arguably) easier to work with

I tend to do all searches using filter expressions...

Yeah I find it more ergonomic.
But at any rate search.filterExpression is a getter / setter, and the getter gives you a deep clone of the real internal filters, so you can't modify the real internal filters array by reference.

I predict that search.filters acts the same way, but I could be wrong

filterExpressions can have nested filter expressions in them

I see your point if you have to parse the filter expressions yourself (e.g. in order to remove / modify).  I've only had to add to an existing list of filters.