In addition to logical flags there are also logical operators. One of the most useful logical operators is the regex match operator=~. The regex match operator compares a string to a regular expression and if the string is a match for the regex then the expression is equivalent totrue, othe...
语法startswith()方法语法：str.startswith(str, beg=0,end=len(string));参数str -- 检测的字符串。
#!/bin/bash string="hello123" # 模式匹配 if [[ "$string" == "hello"* ]]; then echo "The string starts with 'hello'." else echo "The string does not start with 'hello'." fi # 正则表达式匹配 if [[ "$string" =~ ^hello[0-9]+$ ]]; then echo "The string matches the rege...
STRING1 = STRING2 - True if STRING1 and STRING2 are equal. STRING1 != STRING2 - True if STRING1 and STRING2 are not equal. INTEGER1 -eq INTEGER2 - True if INTEGER1 and INTEGER2 are equal. INTEGER1 -gt INTEGER2 - True if INTEGER1 is greater than INTEGER2. INTEGER1 -lt INTEGER...
case "$var" in *sub_string*) # Do stuff ;; *sub_string2*) # Do more stuff ;; *) # Else ;; esac 1 2 3 4 5 6 7 8 9 10 11 12 13检查字符串是否以子字符串开头if [[ $var == sub_string* ]]; then printf '%s\n' "var starts with sub_string." fi # Inverse (var ...
string='My string';if[[$string=~"My"]]then echo"It's there!"fi 注意我们使用了 =~ 用于正则匹配,而不是逻辑运算符了。 正如上面所述,Bash 中如果使数字的比较,也完全可以使用字符串的正则方式处理。 比如要判断某个整数值,是否在某个有效的列表内。可以这样写。
’ matches the characters and a dot, and # strips from the front of the string, so it strips the substring “bash.” from the variable called filename. In second echo statement substring ‘.*’ matches the substring starts with dot, and % strips from back of the string, so it delete...
1.string.endswith(obj, beg=O,end=len(string)) :检查字符串是否以obj结束,如果beg或者end指定则检查指定的范围内是否以obj结束,如果是,返回True,否则返回False 2.string.islower() :如果string中包含至少一个区分大小写的字符,并且所有这些字符都是小写,则返回True,否则返回False ...
if [[ ${arr[*]} == *sub_string* ]]; then printf '%s\n' "sub_string is in array." fiUsing a case statement:case "$var" in *sub_string*) # Do stuff ;; *sub_string2*) # Do more stuff ;; *) # Else ;; esacCheck if string starts with sub-stringif [[ $var == sub_...
*sub_string*) # Do stuff ;; *sub_string2*) # Do more stuff ;; *) # Else ;; esac 讲解 知识点就一个,* 通配符匹配任意数量的字符(包括零个字符) 判断字符串是否以子字符串开头 if [[ $var == sub_string* ]]; then printf '%s\n' "var starts with sub_string." ...