02-02-2019
Please post (at least) OS and shell versions in every new thread that you create, so to avoid ambiguities and keep people from guessing. In above case, also the language / compiler that the construct is used for / with.
Last edited by RudiC; 02-02-2019 at 08:22 AM..
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i have following if condition
if
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Hi friends, :)
In a shell script i found the following if condition.
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Hi,
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5. HP-UX
Executed the following if conditions .. and got different results .
only (( )) gave correct o/p with all scenarios .
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hi,
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if
chr1:109457160 1 109457160 99.1735537190083 +
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file1.txt
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HI
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When i use "if" condition that checks for many AND, OR logical conditions
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o/p of my command is given below
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YACC(1) General Commands Manual YACC(1)
NAME
yacc - yet another compiler-compiler
SYNOPSIS
yacc [ -vd ] grammar
DESCRIPTION
Yacc converts a context-free grammar into a set of tables for a simple automaton which executes an LR(1) parsing algorithm. The grammar
may be ambiguous; specified precedence rules are used to break ambiguities.
The output file, y.tab.c, must be compiled by the C compiler to produce a program yyparse. This program must be loaded with the lexical
analyzer program, yylex, as well as main and yyerror, an error handling routine. These routines must be supplied by the user; Lex(1) is
useful for creating lexical analyzers usable by yacc.
If the -v flag is given, the file y.output is prepared, which contains a description of the parsing tables and a report on conflicts gener-
ated by ambiguities in the grammar.
If the -d flag is used, the file y.tab.h is generated with the define statements that associate the yacc-assigned `token codes' with the
user-declared `token names'. This allows source files other than y.tab.c to access the token codes.
FILES
y.output
y.tab.c
y.tab.h defines for token names
yacc.tmp, yacc.acts temporary files
/usr/lib/yaccpar parser prototype for C programs
/lib/liby.a library with default `main' and `yyerror'
SEE ALSO
lex(1)
LR Parsing by A. V. Aho and S. C. Johnson, Computing Surveys, June, 1974.
YACC - Yet Another Compiler Compiler by S. C. Johnson.
DIAGNOSTICS
The number of reduce-reduce and shift-reduce conflicts is reported on the standard output; a more detailed report is found in the y.output
file. Similarly, if some rules are not reachable from the start symbol, this is also reported.
BUGS
Because file names are fixed, at most one yacc process can be active in a given directory at a time.
YACC(1)