Switch-case implementation for HaasScript

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Here’s my implementation for a switch-case system.

Usage:

local c = ClosePrices()
local len = 20
local indicator = 'sma'

local values = switch({
    select = indicator,
    run_funcs = true,
    cases = {
        ['sma'] = || SMA(c, len),
        ['ema'] = || EMA(c, len),
        ['dema'] = || DEMA(c, len)
    }
})

Plot(0, indicator, values)

If run_funcs = false then you will get the function itself as the return value, and in the case of this example, would run it like this in the plot or wherever: values().

A better example of run_funcs = false would be this:

local c = ClosePrices()
local len = 20
local indicator = 'sma'

local cmd = switch({
    select = indicator,
    -- run_funcs = false, <- if not defined, defaults to false
    cases = {
        ['sma'] = SMA,
        ['ema'] = EMA,
        ['dema'] = DEMA
    }
})

local values = cmd(c, len)
Plot(1, indicator, values)