init version

README.md

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+# personal str functions
+
+

go.mod

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+module qoobing.com/gomod/str
+
+go 1.16

str.go

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+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+package str
+
+import (
+	"container/list"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math/rand"
+	"os"
+	"regexp"
+	"runtime"
+	"strings"
+	"syscall"
+	"time"
+)
+
+const (
+	NUMBERSTRING = "0123456789"
+	CHARSTRING   = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+)
+
+// get random number string with length.
+func GetRandomString(l int) string {
+	str := NUMBERSTRING
+	bytes := []byte(str)
+	result := []byte{}
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < l; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+	return string(result)
+}
+
+// get random number+alphabate string with length.
+func GetRandomCharString(l int) string {
+	str := CHARSTRING
+	bytes := []byte(str)
+	result := []byte{}
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < l; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+	return string(result)
+}
+
+//skip
+func Skip(s string, sep string, n int) string {
+	seplen := len(sep)
+	if seplen == 0 || n < 0 {
+		return s
+	}
+
+	for {
+		i := strings.Index(s, sep)
+		if i < 0 {
+			return s
+		} else {
+			s = s[i+seplen:]
+			n = n - 1
+			if n <= 0 {
+				return s
+			}
+		}
+	}
+	return s
+}
+
+// skip line
+func SkipLine(s string, n int) string {
+	return Skip(s, "\n", n)
+}
+
+// get a map keys as array.
+func MapKeys(imap interface{}) (keys []string) {
+	switch imap.(type) {
+	case map[string]string:
+		m := imap.(map[string]string)
+		for k, _ := range m {
+			keys = append(keys, k)
+		}
+	case map[string]interface{}:
+		m := imap.(map[string]interface{})
+		for k, _ := range m {
+			keys = append(keys, k)
+		}
+	default:
+		panic("Unkown Type")
+	}
+	return keys
+}
+
+// get a map keys and join to string.
+func KeysString(imap interface{}) string {
+	keys := Keys(imap)
+	return strings.Join(keys, ",")
+}
+
+
+//// CHARSTRING   string = "" //will initialize by init function
+//// func init() {
+//// 	NUMBERSTRING = "0123456789"
+//// 	CHARSTRING = NUMBERSTRING
+//// 	for i := 'a'; i <= 'z'; i++ {
+//// 		CHARSTRING = CHARSTRING + string(i)
+//// 	}
+//// 	for i := 'A'; i <= 'Z'; i++ {
+//// 		CHARSTRING = CHARSTRING + string(i)
+//// 	}
+//// }