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Feature/#9 array functions (#57)

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* #9 Added 'APPEND' function

* #9 Added 'FIRST' function

* #9 Added 'FLATTEN' function

* #9 Added 'INTERSECTION' function

* #9 Added 'LAST' function

* #9 Added 'MINUS' function

* #9 Added 'NTH' function

* #9 Added 'OUTERSECTION' function

* #9 Added 'POP' function

* #9 Added 'POSITION' function

* #9 Added 'PUSH' function

* Fixed nil pointer exception in value parser

* #9 Added 'REMOVE_NTH' function

* #9 Added 'REMOVE_VALUE' function

* #9 Added 'REMOVE_VALUES' function

* #9 Added 'REVERSE' function

* #9 Added 'SHIFT' function

* #9 Added 'SLICE' function

* Removed meme

* #9 Added 'SORTED' function

* #9 Added SORTED_UNIQUE function

* #9 Added 'UNION' function

* #9 Added 'UNION_DISTINCT' function

* #9 Added 'UNIQUE' function

* #9 Added 'UNSHIFT' function

* #9 Made more strict optional arg validation

* #9 Fixed linting errors
This commit is contained in:
Tim Voronov
2018-10-05 21:27:34 -04:00
committed by GitHub
parent 9e947ea9c4
commit ec2d6a659b
53 changed files with 3053 additions and 5 deletions
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74
pkg/stdlib/arrays/append.go Normal file
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@ -0,0 +1,74 @@
package arrays
import (
"context"
"github.com/MontFerret/ferret/pkg/runtime/core"
"github.com/MontFerret/ferret/pkg/runtime/values"
)
/*
* Appends a new item to an array and returns a new array with a given element.
* If ``uniqueOnly`` is set to true, then will add the item only if it's unique.
* @param arr (Array) - Target array.
* @param item (Value) - Target value to add.
* @returns arr (Array) - New array.
*/
func Append(_ context.Context, args ...core.Value) (core.Value, error) {
err := core.ValidateArgs(args, 2, 3)
if err != nil {
return values.None, err
}
err = core.ValidateType(args[0], core.ArrayType)
if err != nil {
return values.None, err
}
arr := args[0].(*values.Array)
arg := args[1]
unique := values.False
if len(args) > 2 {
err = core.ValidateType(args[2], core.BooleanType)
if err != nil {
return values.None, err
}
unique = args[2].(values.Boolean)
}
next := values.NewArray(int(arr.Length()) + 1)
if !unique {
arr.ForEach(func(item core.Value, idx int) bool {
next.Push(item)
return true
})
next.Push(arg)
return next, nil
}
hasDuplicate := false
arr.ForEach(func(item core.Value, idx int) bool {
next.Push(item)
if !hasDuplicate {
hasDuplicate = item.Compare(arg) == 0
}
return true
})
if !hasDuplicate {
next.Push(arg)
}
return next, nil
}