Is logic in a Switch statement evaluated if the Case is not true?

[ClubEleven]

I have an indicator that currently computes the values of a number of items whether or not I have selected them for display (via input variable). I would like to avoid consuming computational resources if I have not selected something for display, and want to know whether use of a Switch statement, with the value of the input variable as a Case, is a valid way of accomplishing this.

Thanks!

 

[armybender]

As far as I understand, because TOS is built in Java, both Switch and If statements will not execute logic beyond the branch that returns true. Other languages, and specifically other implementations of switch/if can often evaluate the entire expression, but I do not believe that to be the case in TOS.

There is no way to test this directly without getting very deep into a debugging process though.

 

[darkejo]

Sorry for the late response, but I just wanted to let you know the if expression will always evaluate what's true AND what's false, the if statement does not.

This was pulled directly from the learning center: https://tlc.thinkorswim.com/center/reference/thinkScript/Reserved-Words/if


As a reserved word, if is used in if-expressions and if-statements to specify a conditional operator with then and else branches. Both branches are required for the operator to be valid. However, while the if-expression always calculates both then and else branches, the if-statement only calculates the branch defined by whether the condition is true or false. In thinkScript®, there is also an If-function with a different syntax and usage.


Syntax (if-expression)
plot <plot_name> = if <condition>
then <expression1>
else <expression2>;



plot <plot_name> = if <condition1>
then <expression1>
else if <condition2>
then <expression2>
else <expression3>;

Syntax (if-statement)
plot <plot_name>;
if <condition1> [then] {
<plot_name> = <expression1>;
} else if <condition2> [then] {
<plot_name> = <expression2>;
} else {
<plot_name> = <expression3>;
}



plot <plot_name>;
if <condition1> [then] {
<plot_name > = <expression1>;
} else {
if <condition2> [then] {
<plot_name> = <expression2>;
} else {
<plot_name> = <expression3>;
}
}