# array-at-star   [plain text]

```# test the expansion of \${array[@]} and \${array[*]}, both quoted and
# unquoted.  the expansions should be exactly analogous to the
# expansions of \$@ and \$* quoted and unquoted
A=(a b)

recho "\${A[*]}"

# If IFS is null, the parameters are joined without separators
IFS=''
recho "\${A[*]}"

# If IFS is unset, the parameters are separated by spaces
unset IFS
recho "\${A[*]}"

recho "\${A[@]}"
recho \${A[@]}

IFS='/'
A=(bob 'tom dick harry' joe)
set \${A[*]}
recho \$#
recho \$1
recho \$2
recho \$3

A=(bob 'tom dick harry' joe)
set \${A[*]}
recho \$#
recho \$1
recho \$2
recho \$3

A=(bob 'tom dick harry' joe)
set \${A[@]}
recho \$#
recho \$1
recho \$2
recho \$3

A=(bob 'tom dick harry' joe)
set \${A[@]}
recho \$#
recho \$1
recho \$2
recho \$3

# according to POSIX.2, unquoted \$* should expand to multiple words if
# \$IFS is null, just like unquoted \$@
IFS=''
A=(bob 'tom dick harry' joe)
set "\${A[*]}"
recho \$#
recho \$1
recho \$2
recho \$3

A=(bob 'tom dick harry' joe)
set \${A[*]}
recho \$#
recho \$1
recho \$2
recho \$3

A=(bob 'tom dick harry' joe)
set \${A[@]}
recho \$#
recho \$1
recho \$2
recho \$3

# if IFS is unset, the individual positional parameters are split on
# " \t\n" if \$* or \$@ are unquoted
unset IFS
A=(bob 'tom dick harry' joe)
set \${A[*]}
recho \$#
recho \$1
recho \$2
recho \$3

A=(bob 'tom dick harry' joe)
set \${A[@]}
recho \$#
recho \$1
recho \$2
recho \$3

# but not for "\$@" or "\$*"
A=(bob 'tom dick harry' joe)
set "\${A[*]}"
recho \$#
recho \$1
recho \$2
recho \$3

A=(bob 'tom dick harry' joe)
set "\${A[@]}"
recho \$#
recho \$1
recho \$2
recho \$3

# these should both expand the value of A to multiple words
A=(a b c d e)
IFS=""
recho \${A[@]}
recho "\${A[@]}"

# this example is straight from the POSIX.2 rationale and adapted to arrays
A=(foo bar bam)

recho "\${A[@]}"
recho "\${A[*]}"

unset IFS

recho "\${A[@]}"
recho \${A[@]}
recho "\${A[*]}"
```