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Looping through VARS inside of the “exec script” puzzle

Home Forums Programming Looping through VARS inside of the “exec script” puzzle

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  • #56260
    praeluceo
    Participant

    Hi everybody,
    as I am still quite a newbie to Javascript, sorry if the question is kinda dumb. I am using the “exec script” puzzle.

    I am trying to iterate through a large number of variables.
    Trying to push the variables into an array doesn’t work (console says that the array remains empty). Accessing the variables individualy though does.
    How would I go about it using a for loop?
    Thanks a lot!

    
    let varsToSet = [];
    varsToSet.push(VARS.front_on_seen);
    varsToSet.push(VARS.front_round_seen);
    varsToSet.push(VARS.front_valve_seen);
    varsToSet.push(VARS.back_AC_seen);
    varsToSet.push(VARS.back_foot_seen);
    varsToSet.push(VARS.back_micro_seen);
    varsToSet.push(VARS.back_potential_seen);
    varsToSet.push(VARS.back_SCB_seen);
    varsToSet.push(VARS.back_sd_seen);
    
    // this doesn't work
    varsToSet.forEach(setTrue);
    function setTrue(item) {
      item = 1;
    }
    
    // this on the other hand does work
    VARS.front_on_seen = 1;
    VARS.front_round_seen = 1;
    VARS.front_valve_seen = 1;
    VARS.back_AC_seen = 1;
    VARS.back_foot_seen = 1;
    VARS.back_micro_seen = 1;
    VARS.back_potential_seen = 1;
    VARS.back_SCB_seen = 1;
    VARS.back_sd_seen = 1;
    
    • This topic was modified 2 months, 1 week ago by praeluceo.
    • This topic was modified 2 months, 1 week ago by praeluceo.
    #56266
    kdv77kdv
    Participant

    you should create a list of keys but not values
    this code will create a list of values

    let varsToSet = [];
    varsToSet.push(VARS.front_on_seen);
    varsToSet.push(VARS.front_round_seen);

    and this code will create a list of keys (or names of variables)

    let varsToSet = [];
    varsToSet.push('front_on_seen');
    varsToSet.push('front_round_seen');
    
    varsToSet.forEach(setTrue);
    function setTrue(item) {
        VARS[item] = true;
    }
    #56298
    praeluceo
    Participant

    kdv77kd thx a lot, sincerely thank you for all the great help you’re providing around the forum!
    I understand now my error, great explanation. I was basically storing the values of my variables inside the array, instead of actually storing the variables themself (which I guess are always stored as references in Javascript when put inside of an array). Still a long way to go learning Javascript, but it’s a lot of fun :)

    #56299
    kdv77kdv
    Participant

    In this case it’s just an array of string values (no references) and VARS contains keys with names corresponding to those string values.

    #56303
    praeluceo
    Participant

    Thanks a lot, got it :)!

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