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--- bash:strings:cut_strings [2021/01/11 11:48] – peter
+++ bash:strings:cut_strings [2021/01/11 11:49] (current) – removed peter
@@ Line 1: / Line 1: @@
-====== BASH - Cut Strings ======
-To cut portions of a string:
-<code bash>
-#!/bin/bash
-Str="My name is Peter"
-subStr=${Str:0:6}
-echo $subStr
-</code>
-<WRAP info>
-This script should print out “My nam” as its output.
-The parameter expansion takes the form ${VAR_NAME:S:L}.
-Here, S denotes starting position and L indicates the length.
-</WRAP>
-----
-===== Extracting Substrings Using Cut =====
-**cut** can be used to ‘cut’ a portion of a string, aka the substring.
-<code bash>
-#!/bin/bash
-Str="My name is Peter"
-#subStr=${Str:0:6}
-subStr=$(echo $Str| cut -d ' ' -f 1-3)
-echo $subStr
-</code>
-----
-In general to concatenate two variables you can just write them one after another:
-<code bash>
-a='Hello'
-b='World'
-c="${a} ${b}"
-echo "${c}"
-> Hello World
-</code>
-or
-<code bash>
-foo="Hello"
-foo="${foo} World"
-echo "${foo}"
-> Hello World
-</code>