github.com/MontFerret/ferret@v0.18.0/pkg/stdlib/strings/case.go (about)

     1  package strings
     2  
     3  import (
     4  	"context"
     5  	"strings"
     6  
     7  	"github.com/MontFerret/ferret/pkg/runtime/core"
     8  	"github.com/MontFerret/ferret/pkg/runtime/values"
     9  )
    10  
    11  // LOWER converts strings to their lower-case counterparts. All other characters are returned unchanged.
    12  // @param {String} str - The source string.
    13  // @return {String} - THis string in lower case.
    14  func Lower(_ context.Context, args ...core.Value) (core.Value, error) {
    15  	err := core.ValidateArgs(args, 1, 1)
    16  
    17  	if err != nil {
    18  		return values.EmptyString, err
    19  	}
    20  
    21  	text := strings.ToLower(args[0].String())
    22  
    23  	return values.NewString(text), nil
    24  }
    25  
    26  // UPPER converts strings to their upper-case counterparts. All other characters are returned unchanged.
    27  // @param {String} str - The source string.
    28  // @return {String} - THis string in upper case.
    29  func Upper(_ context.Context, args ...core.Value) (core.Value, error) {
    30  	err := core.ValidateArgs(args, 1, 1)
    31  
    32  	if err != nil {
    33  		return values.EmptyString, err
    34  	}
    35  
    36  	text := strings.ToUpper(args[0].String())
    37  
    38  	return values.NewString(text), nil
    39  }