49 lines
1 KiB
Go
49 lines
1 KiB
Go
package utilities
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import "errors"
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// Utility struct that helps in sorting the available power by value.
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type Pair struct {
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Key string
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Value float64
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}
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// A slice of pairs that implements the sort.Interface to sort by value.
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type PairList []Pair
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// Swap pairs in the PairList
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func (plist PairList) Swap(i, j int) {
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plist[i], plist[j] = plist[j], plist[i]
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}
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// function to return the length of the pairlist.
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func (plist PairList) Len() int {
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return len(plist)
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}
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// function to compare two elements in pairlist.
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func (plist PairList) Less(i, j int) bool {
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return plist[i].Value < plist[j].Value
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}
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// convert a PairList to a map[string]float64
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func OrderedKeys(plist PairList) ([]string, error) {
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// Validation
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if plist == nil {
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return nil, errors.New("Invalid argument: plist")
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}
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ordered_keys := make([]string, len(plist))
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for _, pair := range plist {
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ordered_keys = append(ordered_keys, pair.Key)
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}
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return ordered_keys, nil
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}
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// determine the max value
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func Max(a, b float64) float64 {
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if a > b {
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return a
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} else {
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return b
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}
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}
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