Bash - 检查字符串是否以预定义的字符串（子字符串）开头

Question

我有一个变量$projectName如何检查它是否以此字符串'testProject'开头

Answer 1

您可以在BASH中使用此检查：

[[ "$projectName" == "testProject"* ]]

Answer 2

您可以使用：

[[ "$projectName" =~ ^testProject ]] && echo "yes"
                     ^
                     beginning of line

测试

$ var="hello"
$ [[ "$var" =~ ^he ]] && echo "yes" || echo "no"
yes
$ var="ahello"
$ [[ "$var" =~ ^he ]] && echo "yes" || echo "no"
no