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https://gitee.com/johng/gf.git
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94 lines
2.2 KiB
Go
94 lines
2.2 KiB
Go
// Copyright 2019 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package utils
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import (
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"regexp"
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"strings"
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)
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var (
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// replaceCharReg is the regular expression object for replacing chars in key.
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// It is used for function EqualFoldWithoutChars.
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replaceCharReg, _ = regexp.Compile(`[\-\.\_\s]+`)
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)
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// IsLetterUpper checks whether the given byte b is in upper case.
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func IsLetterUpper(b byte) bool {
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if b >= byte('A') && b <= byte('Z') {
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return true
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}
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return false
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}
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// IsLetterLower checks whether the given byte b is in lower case.
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func IsLetterLower(b byte) bool {
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if b >= byte('a') && b <= byte('z') {
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return true
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}
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return false
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}
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// IsLetter checks whether the given byte b is a letter.
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func IsLetter(b byte) bool {
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return IsLetterUpper(b) || IsLetterLower(b)
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}
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// IsNumeric checks whether the given string s is numeric.
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// Note that float string like "123.456" is also numeric.
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func IsNumeric(s string) bool {
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length := len(s)
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if length == 0 {
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return false
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}
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for i := 0; i < len(s); i++ {
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if s[i] == '-' && i == 0 {
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continue
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}
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if s[i] == '.' {
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if i > 0 && i < len(s)-1 {
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continue
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} else {
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return false
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}
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}
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if s[i] < '0' || s[i] > '9' {
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return false
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}
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}
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return true
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}
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// UcFirst returns a copy of the string s with the first letter mapped to its upper case.
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func UcFirst(s string) string {
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if len(s) == 0 {
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return s
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}
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if IsLetterLower(s[0]) {
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return string(s[0]-32) + s[1:]
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}
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return s
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}
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// ReplaceByMap returns a copy of <origin>,
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// which is replaced by a map in unordered way, case-sensitively.
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func ReplaceByMap(origin string, replaces map[string]string) string {
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for k, v := range replaces {
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origin = strings.Replace(origin, k, v, -1)
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}
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return origin
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}
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// EqualFoldWithoutChars checks string <s1> and <s2> equal case-insensitively,
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// with/without chars '-'/'_'/'.'/' '.
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func EqualFoldWithoutChars(s1, s2 string) bool {
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return strings.EqualFold(
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replaceCharReg.ReplaceAllString(s1, ""),
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replaceCharReg.ReplaceAllString(s2, ""),
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)
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}
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