WHy the double square brackets? Post: 302264713

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why put double square brackets in an if clause?

what is the rationale behind putting double square brackets in an if clause? for e.g. if ] || ] || ]; then echo some fields are null fi

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Use of double square brackets in ksh

Hi First apologies if this has been raised before. I've got the following in a ksh script: if ] For some reason this does not work. But if I remove the double square brackets to: if This works. I thought ksh supported the ]. Or is there more to it? Thanks in advance.

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Double square brackets question

Hi, I just came across an interesting shell script syntax like the one below: ] && (trap 'rm -rf ${WORK_DIR}/*.$$; echo "\n\nInterrupted !!\n\n"; exit 4' 1 2 3 15) Can someone please explain the code snippet above? The trap command bit is fine but ] && is the hazy part. Generally we use an...

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Test command - Two square brackets

Hello, Can someone please explain to me the following line, ] && break I do not understand why two test square brackets are used. Thanks, Shantanu ---------- Post updated at 03:38 PM ---------- Previous update was at 03:35 PM ---------- And, also why there's a $ before (echo $c |...

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Delete text between square brackets and also delete those square brackets using sed or awk

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Single or double square brackets

Hi frieds, I don't understand the difference between single square bracket and double square brackets in a IF condition. Ex. if ; then RETURNJOB=1 else RETURNJOB=0 fi It run, but this if ]; then RETURNJOB=1 else RETURNJOB=0 fi

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Problem with occurence of square brackets

Hello all, I have the following problem: $ cat infile this is spam and i need this too this is spam and i need this too $ perl -nwe '$_ =~ /]+ \]+)\]\]*\]? (\+)$/; print "$1 - $2\n";' infile i need this - too i need this - and i need this too I am not sure how many occurences of...

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IF statement with square brackets

Hi All, Hope you all are doing good. Yesterday in my project i came across a scenario which i can not guess why it was working in one region and why it was not in another region. Please find my issue below. I am using AIX version 6.0 of UNIX in my project, in shell scripting i have the...

LEARN ABOUT SUNOS

csqrtf

csqrt(3M)						  Mathematical Library Functions						 csqrt(3M)

NAME

       csqrt, csqrtf, csqrtl - complex square root functions

SYNOPSIS

       cc [ flag... ] file... -lm [ library... ]
       #include <complex.h>

       double complex csqrt(double complex z);

       float complex csqrtf(float complex z);

       long double complex csqrtl(long double complex z);

DESCRIPTION

       These functions compute the complex square root of z, with a branch cut along the negative real axis.

RETURN VALUES

       These functions return the complex square root value, in the range of the right half-plane (including the imaginary axis).

ERRORS

       No errors are defined.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cabs(3M), complex.h(3HEAD), cpow(3M), attributes(5), standards(5)

SunOS 5.10							    1 Sep 2002								 csqrt(3M)

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why put double square brackets in an if clause?

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Double square brackets question

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