Retrieving Global Values

[mikejhelms]

Hi. A global value can be set using the following format:

Var Int = parseInt(getInterval());
setGlobalValue("Variable"+Int, Variable2);

Is there a comparable format to retrieve global values based on different intervals along the lines of:

function preMain() {
var x=0;
fpArray[x] = new FunctionParameter("Int", FunctionParameter.STRING);
with(fpArray[x++]){
setDefault();
}
}

function main(Int) {
var Variable3 = getGlobalValue("Variable"+Int);
}

Thanks.
Mike

[Guest]

Hi Mike,

If you want to create a simple system of format rules, you can readily create one. Here is what I remember on the subject of what I have heard referred to as "true global variables" ...

There are three commands that I use to label global variables in addition to a simple naming structure.

getInvokerID() returns a string that is unique to the chart
getInterval() returns a string that is unique to the intervals
getSymbol() returns a string that is unique to the symbol

For example, if you want to broadcast a global that represents seconds, you would just want to use the getInterval() method then add a string "seconds" for clarity. I try and enclose the string that is used as the name in parenthesis. setGlobalValue(("my name"+getInvokerID()+getInterval()), myVariable); (better yet, only create the string once and cache it by assigning to a regular global variable)

You can also test whether another chart has already created a global variable (very handy). I do this by comparing the value returned from a getGlobalValue(string name) method to null using three equal signs. This prevents type conversion (e.g. null will equal zero or a false with two equal signs, likewise, a string "1" will equal a numerical 1 with two equal signs) which can at times be confusing, so I do this just to keep things straight. If the returned variable has been created already, it will not be null. Otherwise, it exists and does not need to be re-created.

Let me know if this is sufficient, or we can pursue this further if you would like

Originally posted by mikejhelms
Hi. A global value can be set using the following format:

Var Int = parseInt(getInterval());
setGlobalValue("Variable"+Int, Variable2);

Is there a comparable format to retrieve global values based on different intervals along the lines of:

function preMain() {
var x=0;
fpArray[x] = new FunctionParameter("Int", FunctionParameter.STRING);
with(fpArray[x++]){
setDefault();
}
}

function main(Int) {
var Variable3 = getGlobalValue("Variable"+Int);
}

Thanks.
Mike

[Guest]

Hi Mike,

This is a followup of my last post. I enclosed an efs that demonstrates some of the techniques I described.

Hope this helps,

[mikejhelms]

Wonderful layout of the options for setting and getting global values, Steve. I’m going to play with them for awhile to see if I can apply some of the concepts to my particular situation. Like others who posted in this thread I wasn’t aware of the existence of getInvokerID(). Checking back I now see it’s been around since 2003. I’m considering having a port implanted in my frontal lobe so I can simply plug in once a day and sip coffee while relevant info is downloaded keeping me current in this and other areas.

Mike