Tcl8.6.15/Tk8.6.15 Documentation > Tcl Commands, version 8.6.15 > lassign

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NAME

SYNOPSIS

DESCRIPTION

EXAMPLES

lassign {a b c} x y z       ;# Empty return
puts $x                     ;# Prints "a"
puts $y                     ;# Prints "b"
puts $z                     ;# Prints "c"

lassign {d e} x y z         ;# Empty return
puts $x                     ;# Prints "d"
puts $y                     ;# Prints "e"
puts $z                     ;# Prints ""

lassign {f g h i} x y       ;# Returns "h i"
puts $x                     ;# Prints "f"
puts $y                     ;# Prints "g"

The lassign command has other uses. It can be used to create the analogue of the “shift” command in many shell languages like this:

set ::argv [lassign $::argv argumentToReadOff]

SEE ALSO

KEYWORDS