A command in the [TclX] package.
    :   '''lvarpush''' ''var string'' ?''indexExpr''?
The '''lvarpush''' command pushes (inserts) ''string'' as an element in the list contained in the variable ''var''. The element is inserted before position ''indexExpr'' in the list. If ''indexExpr'' is omitted, then 0 is assumed. If ''var'' does not exist, it is created.

If the expression ''indexExpr'' starts with the string "'''end'''", then '''end''' is replaced with the index of the last element in the list. If the expression starts with "'''len'''", then '''len''' is replaced with the length of the list. Note the value of "'''end'''" means insert the string ''before'' the last element.

See also [lvarpop].



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