递增一次计数器，直到值大于if语句（Javascript）

Question

I have the following code:

if (step < 1) {
    accSteps.push(parseInt(step));
}

for (i = 0; i < accSteps.length; i++) { 
    zOutput++;
    document.getElementById("zVal").innerHTML = zOutput;
}

The step variable is z co-ordinate from an mbed accelerometer to count number of steps. Currently, when the z-coordinate is < 1 (ie a step has been made), it will carry on adding steps to the counter until the z-coordinate is 1 or greater. How do I increment by just 1 for the whole duration until z-coordinate is 1 or greater again?

Answer 1

You need to set a flag for that.

// Put this flag somewhere only executed once
var hasRegisteredStep = false;

if (step < 1 && hasRegisteredStep === false) {
    accSteps.push(parseInt(step));
    hasRegisteredStep = true;
} else if(step > 0) {
   hasRegisteredStep = false; // Reset the flag if greater than 0
}

for (i = 0; i < accSteps.length; i++) { 
    zOutput++;
    document.getElementById("zVal").innerHTML = zOutput;
}

Answer 2

Just add that condition in the for loop:

if (step < 1) {
        accSteps.push(parseInt(step));
    }
    for (i = 0; i < accSteps.length && step < 1; i++) { 
        zOutput++;
        document.getElementById("zVal").innerHTML = zOutput;
}