英文:
Pine Script language syntax
问题
if (float)
float = float ? float : float
float ph = ta.pivothigh(prd, prd)
float pl = ta.pivotlow(prd, prd)
float lastpp = ph ? ph : pl ? pl : na
if lastpp
...
英文:
I just start to learning Pine Script. And I cant find any information about this issue in language documentation or google. This code is working and I find it in someones indicator script.
I want to understand what this means:
-
if (float)
float = float ? float : float
float ph = ta.pivothigh(prd, prd)
float pl = ta.pivotlow(prd, prd)
float lastpp = ph ? ph : pl ? pl : na
if lastpp
...
答案1
得分: 1
?: 被称为三元运算符。
它的工作方式是，它会检查一个条件，如果条件为true，则返回value1，否则返回value2。
condition ? value1: value2
你可以使用一个if块来写出相同的检查，如下所示：
if (condition)
value1
else
value2
编辑：
如果没有枢轴，ta.pivothigh 将返回 NaN。NaN 不是一个数字，因此在条件中运行它将返回 false。
实质上，ph ? 检查的是是否存在枢轴高点。
英文:
?: is called ternary operator.
The way it works is, it will check a condition and return value1 if the condition is true and return value2 otherwise.
condition ? value1: value2
You can write the same check with an if block as below:
if (condition)
value1
else
value2
Edit:
ta.pivothigh will return NaN if there is no pivot. NaN is not a number so when you run it in a condition it will return false.
Essentially, what ph ? checks is to see if there is a pivot high or not.
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