我如何指定在 pinescript 中迭代哪个数组?

how do i specify which array to iterate in pinescript?

让我们假设 for 循环评估列表中的符号是上升趋势还是下降趋势,“i > 0”表示上升趋势,“i < 0”表示下降趋势

例如,如果我想遍历 python 中的列表,我会这样做:

uptrend = 0
downtrend = 0

list = ["AXP", "APPL", "MMM", "TSLA", "FB", "AMZN"]

for i in list:
    if i > 0:
        uptrend += 1

    else:
        downtrend += 1

如何在 pinescript 中实现相同的代码?

到目前为止,我在 pinescript 中所做的是这样的:

uptrend = 0
downtrend = 0

string[] list = array.from("AXP", "APPL", "MMM", "TSLA", "FB", "AMZN")

但是我卡在了for循环部分,因为我无法指定我来自哪个数组,在python我使用(for i in list),我用什么代替“in " 在 pinescript 中?

pinescript也支持for .. in.

//@version=5
indicator("My script")

var string[] list = array.from("AXP", "APPL", "MMM", "TSLA", "FB", "AMZN")
string s = ""

for i in list
    s := s + i + " "
    
var testTable = table.new(position = position.top_right, columns = 1, rows = 1, bgcolor = color.yellow, border_width = 1)
if barstate.islast
    table.cell(table_id = testTable, column = 0, row = 0, text = s)