In this post, we will look at few Regular expressions to get first or last few characters from a string. This tip is very useful to use in bash shell scripts. Way 1 This is the method i used to prefer since i remember this always…. In this method, we will grep a character using ...
#!/bin/bash #: Description : print formatted sales report ## Build a long string of equals signs divider=== divider=$divider$divider ## Format strings for printf header="\n %-10s %11s %8s %10s\n" format=" %-10s %11.2f %8d %10.2f\n" ## Width of divider totalwidth=44 ## Pri...
characters `:', ` ', `\t', `\n', and sometimes `?'. So you might call this function like: line = get_history_event ("!echo:p", &index, 0); */char*get_history_event(string, caller_index, delimiting_quote)constchar*string;int*caller_index;intdelimiting_quote; {registerinti;regis...
'. -N Print non-printable characters as is. -p Print the protections for each file. -u Displays file owner or UID number. -g Displays file group owner or GID number. -s Print the size in bytes of each file. -h Print the size in a more human readable way. -D Print the date ...
Let’s break down what’s going on in the Bash script you just created. Bash executes programs in order from the first line in your file to the last line. Theexprcommand can be used toevaluateBashexpressions. An expression is just a valid string of Bash code that, when run, produces ...
# holds the name of the program being run. You can get this # value from the first item on the command line ($0). # Reference: This was copied from <http://www.linuxcommand.org/wss0150.php> PROGNAME=$(basename$0) functionerror_exit ...
2.4 Remove the First and Last Characters of a String Use Parameter Expansion 1 2 3 4 5 6 7 8 #!/bin/bash org_string="hello world" new_string="${org_string:1}" new_string="${new_string%?}" echo"This is Original string: $org_string" ...
${string:position:length} Extract $length of characters substring from $string starting from $position. In the below example, first echo statement returns the substring starting from 15th position. Second echo statement returns the 4 characters starting from 15th position. Length must be the number...
We can also use the tail command with the -c option to specify the last three characters of a string. However, in this case, we need to iterate over each line of the file before we use the tail command: $ cat last_three_characters.sh #!/usr/bin/env bash while read -r line; do...
{nvm_path}"/.nvmrc) declare locally_resolved_nvm_version # `nvm ls` will check all locally-available versions # If there are multiple matching versions, take the latest one # Remove the `->` and `*` characters and spaces # `locally_resolved_nvm_version` will be `N/A` if no local ...