str="Hello World" if [[ "$str" == *"Hello"* ]]; then echo "String contains 'Hello'" else echo "String does not contain 'Hello'" fi 这些方法可以帮助你在Bash中正确比较变量和字符串。请注意,变量在比较时需要使用双引号括起来,以避免由于特殊字符引起的错误。
$ ./check_substr.sh "This is a test string" "isa test" "This is a test string" does not contain "isa test" $ ./check_substr.sh "This is a test string" "new string" "This is a test string" does not contain "new string" 测试的时候,如果传入的字符串参数包含空格,要用双引号括起来。
An crray is like a series of slots that hold values. Each slot is known as an element, and each element can be accessed via a numerical index. An array element can contain a string or a number, and you can use it just like any other variable. The indices for arrays start at 0 and...
/bin/bash string1="Hello World!" string2="Hello Bash!" if [[ $string1 == "Hello World!" ]] then printf "Same! \n" else print "Different! \n" fi if [[ $string2 = *"Bash"* ]] then printf "Contains word 'Bash'. \n" else printf "Does not contain the word. \n" fi 如...
string2="Hello Bash!" if [[ $string1 == "Hello World!" ]] then printf "Same! \n" else print "Different! \n" fi if [[ $string2 = *"Bash"* ]] then printf "Contains word 'Bash'. \n" else printf "Does not contain the word. \n" ...
line 26) `assert_output --partial "CI_COMMIT_REF_SLUG"' failed -- output does not contain substring -- substring (1 lines): CI_COMMIT_REF_SLUG output (3 lines): ./bin/deploy.sh: join_string_by: command not found oc error Could not login -- ** Did not delete , as test failed...
either the command is executed successfully, or there’s an error. In terms of errors there are many ways that a program can go wrong, and Unix can take different actions depending on what kind of error occurs. For example if I enter the name of a command that does not exist into the...
# to call: char_name string # check if $1 does indeed contain only characters a-z,A-Z { # assign the argument across to new variable _LETTERS_ONLY=$1 _LETTERS_ONLY=`echo $1 | awk '{if($0~/[^a-zA-Z]/) print "1"}'` ...
Bash does not apply any syntactic interpretation to the context of the expansion or the text between the braces. A correctly-formed brace expansion must contain unquoted opening and closing braces, and at least one unquoted comma or a valid sequence expression. Any incorrectly formed brace ...
Bash: How to Check if String is Not Empty You may not have experienced it, but it does happen. One of these days, you may experience it. Sometimes, a bash script may contain empty variables. Here, we have provided every detail on how to check for empty variables in a bash script, ...