Interface ParamsBuilder

Expands each item in this to multiple items with { [name]: value } for each value.

In other words, takes the cartesian product of [ the items in this ] and [ {[name]: value} for each value in values ]

Expands each item in this to multiple items, one for each item in newParams.

In other words, takes the cartesian product of [ the items in this ] and newParams.

Note: When only a single key is being added, use the simpler combine for readability.

                    this = [ {a:1}, {b:2} ]
               newParams = [ {x:1}, {y:2} ]
this.combineP(newParams) = [ {a:1,x:1}, {a:1,y:2}, {b:2,x:1}, {b:2,y:2} ]
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Expands each item in this into zero or more items. Each item has its parameters expanded with one new key, key, and the values returned by expander.

Expands each item in this into zero or more items. Each item has its parameters expanded with those returned by the expander.

Note: When only a single key is being added, use the simpler expand for readability.

              this = [     a       ,      b     ,       c       ]
this.map(expander) = [   f(a)           f(b)          f(c)      ]
                   = [[a1, a2, a3] ,    [ b1 ]  ,       []      ]
 merge and flatten = [ merge(a, a1), merge(a, a2), merge(a, a3), merge(b, b1) ]
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Filters this to only items for which pred returns true.

Filters this to only items for which pred returns false.