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Expr Index Syntax Error


If we define a variable named count, setting it to zero: count=0 ...we can output the value of that variable with the echo command: echo $count 0 ...now we can increment otherwise zero. String expressions `expr' supports pattern matching and other string operators. bash shell shell-script share|improve this question asked Aug 7 '14 at 23:01 gbaburov 32 marked as duplicate by Gillesbash Users with the bash badge can single-handedly close bash questions as duplicates his comment is here

Since your question is not clear, I'm not sure what expr is doing there. Relations for `expr' `expr' supports the usual logical connectives and relations. Disclaimer: Yes I usually talk crap Adv Reply June 19th, 2008 #5 Richard_ View Profile View Forum Posts Private Message Spilled the Beans Join Date Jun 2008 Location Durban Beans What does OGR stand for?

Expr Index Syntax Error

By convension, Environment variables are CAPITALIZED. vBulletin 2000 - 2016, Jelsoft Enterprises Ltd. Otherwise, the result will be 0. Note: Kshell used on solaris 8.

sh — The Bourne shell command interpreter. EXPRESSION may be: ARG1 | ARG2 ARG1 if it is neither null nor 0, otherwise ARG2. Adv Reply June 19th, 2008 #4 pedro_orange View Profile View Forum Posts Private Message Extra Foam Sugar Free Ubuntu Join Date Nov 2007 Location UK Beans 772 DistroUbuntu 8.04 Hardy Bash Index Of Substring Your line uses grep and awk which is not necessary as you could handle all that using awk.

Roberts Apr 20 '13 at 20:37 Id love to know why this was down voted –Jeffrey L. Expr Index Mac I'm sorry for going on too much but such things matter more than machines.On the other hand, you're a royal pain in the ... otherwise zero. https://ubuntuforums.org/showthread.php?t=834263 That also seems to be a strange use of the word "index." I would have expected it to find the index of a substring, which seems to be pretty common usage

STRING : REGEX Perform pattern matching. Substring In Bash Tic Tac Toe - C++14 What are the German equivalents of “First World War”, “World War I”, and “WWI”? Otherwise val2. How to do it?

Expr Index Mac

Here, the regular expression '.*' represents "any number of any character", therefore the result is: 4 expr text : tex Returns the number of characters from the regular expression after the https://discussions.apple.com/thread/923299?tstart=0 A blank line below separates increasing precedence groups. Expr Index Syntax Error How to apply for UK visit visa after four refusal Strange device identification Hilbert-irreducible Banach space Is it dangerous to use default router admin passwords if only trusted users are allowed Expr Syntax Error Mac If the match succeeds and REGEX uses `\(' and `\)', the `:' expression returns the part of STRING that matched the subexpression; otherwise, it returns the number of characters matched.

The syntax of match function is shown below: match string pattern The match function returns the number of characters in the pattern is a match is found. http://fullflash.net/syntax-error/syntax-error-unexpected-39-else-39-t-else-in-php.html making new symbol from two symbols Why were Navajo code talkers used during WW2? A blank line below separates increasing precedence groups. All rights reserved. Expr Mac

  1. This problem occurs for all parameters of expr, including the length parameter.
  2. Reading the man page, I realized expr does something quite different on OS X than on Linux.
  3. Later I thought of a funny answer in which I blamed everything on the crazy shell I use.
  4. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site.
  5. Mac OS X uses BSD expr which does not have the index command.
  6. Otherwise it returns 0.

Expressions expr prints the value of EXPRESSION to standard output. Browse other questions tagged bash scripting shell-scripting or ask your own question. Also, have tried putting ' quotes around the $OF variable to no avail. weblink Please post it as an answer and I will check it off =] –Jeffrey L.

share|improve this answer edited Aug 7 '14 at 23:13 answered Aug 7 '14 at 23:06 Scott 3,81921328 add a comment| Not the answer you're looking for? Bash Expr Was this page useful? That just returns 0 as not found.

echo ${string:(-4)} where -4 is your offset from the end share|improve this answer answered Dec 9 '10 at 23:12 damir 8792819 Thanks, that works and is much cleaner. –sdoca

This is the same as STRING : REGEX. why? The returned output is the number of characters that matched. share|improve this answer answered Aug 7 '14 at 23:22 val0x00ff 3,7421824 add a comment| up vote 0 down vote You need double quotes: IDX=`expr index "$OF" ' '` Without quotes, the

ARG1 != ARG2 ARG1 is unequal to ARG2. Does compactness depend on the metric? Lengthwise or widthwise. check over here You could install/compile GNU expr or use this:echo string1 | sed -n "s/[string2].*//p" | wc -cNote the double quotes in the sed statement otherwise string2 will not be expanded.

I cannot recall the last time something like that happened in politics or religion.-- Carl Sagan, 1987 CSICOP keynote address Helpful (0) Reply options Link to this post This site contains Can the editor of a book add citations of individual chapters to his own citation count? Val1 >= Val2 : Returns 1 if val1 is greater than or equal to val2. Pattern matches return the string matched between \( and \) or null; if \( and \) are not used, they return the number of characters matched or 0.

I think it has to do with how the variable is being passed into the expression. more hot questions default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Other Can anybody suggest which command I should use to get the same functionality of the above on OS X?ThanksAndreas MacPro, Mac OS X (10.4.9), Server Posted on Apr 11, 2007 11:45 Why is the size of my email so much bigger than the size of its attached files?

expr syntax expr EXPRESSION expr OPTION Options --help Display a help message and exit. --version Display version information and exit. Pattern matches return the string matched between \( and \) or null; if \( and \) are not used, they return the number of characters matched or 0. You can not post a blank message. echo "07132006" | awk '{ print substr( $0, 5, 4 ) }' OR echo "07132006" | awk '{ print substr( $0, length($0) - 3, length($0) ) }' Remove advertisements Sponsored Links

Browse other questions tagged bash syntax-error substr or ask your own question. Password Home Search Forums Register Forum RulesMan PagesUnix Commands Linux Commands FAQ Members Today's Posts Shell Programming and Scripting BSD, Linux, and UNIX shell scripting Post awk, bash, csh, ksh, otherwise zero. My number is correct for the bash index of a character in a character array.

From the zshparam manpage:The elements are numbered beginning with 1, unless the KSH_ARRAYS option is set in which case they are numbered from zero.However, that shouldn't affect the output of my