add a prefix for all elements in a macro

[Bo Chen]

Hi all,

Is there a simple way to add a prefix for all elements in a macro? say I have a macro called var, which contains "price mpg weight". and I would like to have a new macro "eq1:price eq1:mpg eq1:weight".

Thanks,

[Clyde Schechter]

local var price mpg weight

local var: subinstr local var " " " eq1:", all
local var eq1:`var'

This code only works provided each token in the local macro is separated by exactly one space.

A more robust approach is with a loop:

local var price mpg weight

local newvar
foreach v of local var {
    local newvar `newvar' eq1:`v'
}

If you need the resulting macro to be named var, like the original, you can conclude with -local var `newvar'-.

[Bo Chen]

local var price mpg weight

local var: subinstr local var " " " eq1:", all
local var eq1:`var'

This code only works provided each token in the local macro is separated by exactly one space.

A more robust approach is with a loop:

local var price mpg weight

local newvar
foreach v of local var {
local newvar `newvar' eq1:`v'
}

If you need the resulting macro to be named var, like the original, you can conclude with -local var `newvar'-.

Thank you, Clyde. I know all the commands and functions you wrote, but I just didn't know they could be used in these ways to solve my problem!