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Unix Expr Substr Syntax Error


Unix & Linux Stack Exchange works best with JavaScript enabled Skip to Main Content Search Help Tips Dictionary History Forums Contact You are here: Help > Linux and Unix Linux and 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 bash syntax-error substr share|improve this question asked Dec 9 '10 at 22:56 sdoca 3,176145298 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted how about Aug 8 '14 at 0:07 This question was marked as an exact duplicate of an existing question. 1 You can change the first line to. have a peek here

Then change my command to:echo $((${#test%%[cb]*} + 1))I guess I need expr. Modify functions in R using body, formals and environment methods How do we play with irregular attendance? of=$(ps fax | awk '/php-fmp: master process/{print $1}'). This problem occurs for all parameters of expr, including the length parameter. learn this here now

Expr Index Syntax Error

The "less than" symbol ("<") is preceded by a backslash ("\") to protect it from the shell, which would otherwise interpret it as a redirection operator. Your line uses grep and awk which is not necessary as you could handle all that using awk. Does compactness depend on the metric? How to create a torus with divided cuts that correspond to the direction of the torus Why does my capsule collider fall without my object (Unity)?

The time now is 11:29 PM. - Contact Us - UNIX & Linux - unix commands, linux commands, linux server, linux ubuntu, shell script, linux distros. - Advertising - Top and so ... Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Bash Index Of Substring Arithmetic Operator Examples: 1.

All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use. All Rights Reserved. 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 ... https://ubuntuforums.org/showthread.php?t=834263 Helpful (0) Reply options Link to this post by Gary Kerbaugh, Gary Kerbaugh Apr 12, 2007 6:41 PM in response to Ken Nellis Level 6 (18,040 points) Apr 12, 2007 6:41

Andreas Helpful (0) Reply options Link to this post by Gary Kerbaugh, Gary Kerbaugh Apr 11, 2007 6:58 PM in response to LittleSaint Level 6 (18,040 points) Apr 11, 2007 6:58 Substring In Bash I'm pretty sure having double quotes around it in a script makes a difference, but that might just be to do with $variables within the "s. Quotes seem to act differently in interactive shells compared to automated. Both arguments are coerced to numbers; an error occurs if this cannot be done.

  • Matching a regexp The match function is used to find anchored pattern match of regexp in the string.
  • This makes it possible to test `expr length quote "$x"' or `expr quote "$x" : '.*/\(.\)'' and have it do the right thing even if the value of $X happens to
  • However the pattern does not start from the beggining of the main string.
  • Otherwise the expr command may throw error or print them as a string.

Expr Index Mac

You're a strict task master but right; I read in the man page about it returning zero and forgot. https://discussions.apple.com/thread/923299?tstart=0 I would have pulled an Indiana Jones and whipped out awk. Expr Index Syntax Error The regular expression after the colon is matched to the text before the colon. Expr Syntax Error Mac Examples # A partial match will return the number of characters that match: $ expr ss64 : ss6 3 # The condition in string 2 must entirely match string 1 $

However, mathematically it isn't too difficult; you just have to use modular arithmetic. navigate here otherwise zero. The expr command treated it as a string and printed on the terminal. 2. Why cast an A-lister for Groot? Expr Mac

Here, the result is: 1 expr 5 \> 10 Here, the result is 1 (true) if 5 is less than 10, otherwise the result is 0. Later I thought of a funny answer in which I blamed everything on the crazy shell I use. Does Nietzsche's rejection of Socrates mean that he is a relativist about ethics? Check This Out ARG1 >= ARG2 ARG1 is greater than or equal to ARG2.

The same be achieved with cut: echo "onetwothree" | cut -c 1-3 share|improve this answer edited Nov 25 '15 at 14:51 answered Apr 21 '13 at 7:02 kofemann 1,418817 add a Bash Expr Index of the substring You can find the position of a string in the main string using the index function. 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

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Let me point out that your zsh script isn't quite right yet. substr STRING POSITION LENGTH Returns the substring of STRING beginning at POSITION with length at most LENGTH. Browse other questions tagged bash syntax-error substr or ask your own question. That just returns 0 as not found.

STRING : REGEX Perform pattern matching. My advisor refuses to write me a recommendation for my PhD application unless I apply to his lab AWS EC2 SSH from my IP address which has changed Are assignments in Val1 = Val2 : Returns 1 if val1 is equal to val2. this contact form The difference between the two answers is just the flow of karma but stopping the flow of negative by saying something is a real and difficult choice and yours shows character.

i want to set the 2006 to a variable. Results 1 to 5 of 5 Thread: [SOLVED] 'expr' command problems Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 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?