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Top Forums UNIX for Beginners Questions & Answers How to check string contain multiple tabs or spaces? Post 303032549 by cmdcmd on Wednesday 20th of March 2019 09:30:41 AM
Old 03-20-2019
How to check string contain multiple tabs or spaces?

str contains tabs and multiple spaces
Code:
str="hello                       world. How are    you?"

I want to check string start with hello world,
and my code is:

Code:
if [[ $str == "hello[[:blank:]]world"* ]]; then
  echo "found"
else
  echo "not found"
fi

Not work

Other solution may work is to replace all tabs and spaces with a single space. I googling and found a solution

Code:
	shopt -s extglob
	temp=$(echo "${str//+([[:blank:]])/ }")
	if [[ $temp == "hello world"* ]]; then
		echo "found"
	fi

But I don't want to replace, just check in condition. I am new to shell, sorry.
 

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MB_STRTOUPPER(3)							 1							  MB_STRTOUPPER(3)

mb_strtoupper - Make a string uppercase

SYNOPSIS
string mb_strtoupper (string $str, [string $encoding = mb_internal_encoding()]) DESCRIPTION
Returns $str with all alphabetic characters converted to uppercase. PARAMETERS
o $str - The string being uppercased. o $encoding -The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used. RETURN VALUES
$str with all alphabetic characters converted to uppercase. UNICODE
For more information about the Unicode properties, please see http://www.unicode.org/unicode/reports/tr21/. By contrast to strtoupper(3), 'alphabetic' is determined by the Unicode character properties. Thus the behaviour of this function is not affected by locale settings and it can convert any characters that have 'alphabetic' property, such as a-umlaut (a). EXAMPLES
Example #1 mb_strtoupper(3) example <?php $str = "Mary Had A Little Lamb and She LOVED It So"; $str = mb_strtoupper($str); echo $str; // Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO ?> Example #2 mb_strtoupper(3) example with non-Latin UTF-8 text <?php $str = "Txiotn a nE Baos unuvn yn, dpaokeCei unp vw0po kuvs"; $str = mb_strtoupper($st_, 'UTF-8'); _ _ _ _ echo $str; // Prints TXI>TH A/TTHH BAO> YHMNH | H, /PA>KE/EI YTTP NOOPO KYN> ?> SEE ALSO
mb_strtolower(3), mb_convert_case(3), strtoupper(3). PHP Documentation Group MB_STRTOUPPER(3)
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