Checks if String contains a search String, handling null. This method uses String.indexOf(String). A null String will return false. StringUtils.contains(null, *) = false StringUtils.contains(*, null) = false StringUtils.contains("", "") = true StringUtils.contains("abc", "") = true Str...
Note:the expression above is a “proper” regular expression syntax. The syntax below will check to see if $var starts with the hashtag: Method 2: To see if a string contains a substring, use the following syntax: Note: the full stop (.) that comes before the asterisk (*) matches ze...
for FILE in * do ## https://linuxize.com/post/how-to-check-if-string-contains-substring-in-bash/ if [[ "$FILE" == *"cnp_"* ]] then echo 'cnp_* file found; skipping' continue fi ## rest of script done Output: cnp_* file found; skipping --- FILE: 1 | NAME: li...
aws_cloudfront_distribution_for_origin.sh - returns the AWS CloudFront ARN of the distribution which serves origins containing a given substring. Useful for quickly finding the CloudFront ARN needed to give permissions to a private S3 bucket exposed via CloudFront aws_cloudtrails_cloudwatch.sh - list...
Check if string contains a sub-stringUsing a test:if [[ $var == *sub_string* ]]; then printf '%s\n' "sub_string is in var." fi # Inverse (substring not in string). if [[ $var != *sub_string* ]]; then printf '%s\n' "sub_string is not in var." fi # This works ...
There is no in array operator in bash to check if an array contains a value. Instead, to check if a bash array contains a value you will need to test the values in the array by using a bash conditional expression with the binary operator =~. The string to the right of the operator...
If set to the value exact, the string supplied must match the name of a stopped job exactly; if set to substring, the string supplied needs to match a substring of the name of a stopped job. The sub- string value provides functionality analogous to the %? job identifier (see JOB ...
valint() #@ USAGE: valint INTEGER case ${1#-} in ## Leading hyphen removed to accept negative numbers *[!0-9]*) false;; ## the string contains a non-digit character *) true ;; ## the whole number, and nothing but the number esac 如果函数体用括号括起来,那么它是在子 shell ...
When an error (or failed transaction) is encountered, besides increasing the error counter, it is a good idea to print an indication that there was an error. Ideally, the string of characters should have a substring such as ERROR or something similar (see the statement in bold blue), which...
9 then echo "File contains at least one occurrence of Bash."10 fi11 12 word=Linux13 letter_sequence=inu14 if echo "$word" | grep -q "$letter_sequence"15 # "-q"选项是用来阻止输出16 then17 echo "$letter_sequence found in $word"...