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56 lines
930 B
56 lines
930 B
6 years ago
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package xstr
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import (
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"bytes"
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"strconv"
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"strings"
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"sync"
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)
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var (
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bfPool = sync.Pool{
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New: func() interface{} {
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return bytes.NewBuffer([]byte{})
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},
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}
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)
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// JoinInts format int64 slice like:n1,n2,n3.
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func JoinInts(is []int64) string {
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if len(is) == 0 {
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return ""
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}
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if len(is) == 1 {
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return strconv.FormatInt(is[0], 10)
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}
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buf := bfPool.Get().(*bytes.Buffer)
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for _, i := range is {
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buf.WriteString(strconv.FormatInt(i, 10))
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buf.WriteByte(',')
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}
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if buf.Len() > 0 {
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buf.Truncate(buf.Len() - 1)
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}
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s := buf.String()
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buf.Reset()
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bfPool.Put(buf)
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return s
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}
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// SplitInts split string into int64 slice.
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func SplitInts(s string) ([]int64, error) {
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if s == "" {
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return nil, nil
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}
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sArr := strings.Split(s, ",")
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res := make([]int64, 0, len(sArr))
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for _, sc := range sArr {
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i, err := strconv.ParseInt(sc, 10, 64)
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if err != nil {
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return nil, err
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}
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res = append(res, i)
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}
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return res, nil
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}
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