Javascript Function test each array and return all in array

Question

Hi everybody and thanks for your helps.

hi have a context here in a game engine, i would like know if existe a easy way to return each array ? Ex: [true,true,false,false] here the snippet i make it more simple and clean to read , but is very similar to what i need to do.

 Gate1 = [];
Gate1 = [[3,4],[4,6]]; // [[ItemID,NbItem],[ItemID,NbItem]]

function check(ID, NEED, GVariable) {
for (var F=0; F<ID.length; F++) {
var Founds = [ID[F],NEED[F]];
if (Founds === GVariable[F]){
//return stop the loop, but i need to test all ID.length and return true or false in array it in array
		return true;
		}
		else {return false;}
	}
}
var Get = check([3,4,10,11],[4,6,8,7],Gate1);
console.log(Get); //need to be ===  Get[[true,true,false,false]] 
alert("Gets= "+Get+'\n'+'But i want = [true,true,false,false]');

and what exactly is the logic, to decide whether it is true value of false in array? — Ajay Narain Mathur
– Ajay Narain Mathur, Commented Dec 18, 2016 at 9:01
example for test if the array GateX have all item recipe to build ex: the gate. If one false, cant not build, and is need to show why and where in the array — jon
– jon, Commented Dec 18, 2016 at 9:12

Nina Scholz · Accepted Answer · 2016-12-18 09:40:04Z

1

You could use a hash table and check against the value you need. Then return with Array#map an array with the result.

I strongly recommend to rename the variables to a more common style with small letters.

function check(ID, NEED, GVariable) {
    var hash = Object.create(null);

    GVariable.forEach(function (a) {
        hash[a.join('|')] = true;
    });
    return ID.map(function (id, i) {
        return hash[[id, NEED[i]].join('|')] || false;
    });
}

var Gate1 = [[3, 4], [4, 6]], // [[ItemID,NbItem],[ItemID,NbItem]],
    Get = check([3, 4, 10, 11], [4, 6, 8, 7], Gate1);

console.log(Get); // [true, true, false, false]

.as-console-wrapper { max-height: 100% !important; top: 0; }

answered Dec 18, 2016 at 9:40

Nina Scholz

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4 Comments

jon Over a year ago

OMG NICE NICE , I am at the beginning, I do not know all the JavaScript trick. Your code are very clean. I will study more the map function. Thank you so much friend. For my variable names, I usually write in lowercase or uppercase according to their importance and their SCOPE. Because some var are for a for a specific .js file, ans other need to use for all .js files. I indeed exaggerate for this example. Thank you so much for your help, you are great.

jon Over a year ago

These possible to make this function functional, but with arrays in dynamic position. var Gate1 = [[4, 6],[3, 4]] // Also Give [true, true, false, false]

Nina Scholz Over a year ago

the order does not matter. do you need the same order?

jon Over a year ago

Sorry Yes, I had to make a bad entry. Is true, the order does not matter. Yes for a version with the mandatory order. I will be curious to study the difference between the 2 codes. This will be nice to you.

SLePort · Accepted Answer · 2016-12-18 12:17:12Z

1

You could also zip your ID and NEED arrays and use the every function to compare zipped and GVariable arrays:

function checkit(ID, NEED, GVariable) {
  var result = [], arrays = [ID, NEED];
  zipped = arrays[0].map(function(_,i){ 
      return arrays.map(function(array){return array[i]})
  });
  zipped.forEach(function(arr, idx) { 
    result.push(arr.every(function(elt, i) {
      return (elt == GVariable[i][idx]);
    }))
  })
  return result;
}

var Gate1 = [[3,4],[4,6]]; 
var Get = checkit([3,4,10,11],[4,6,8,7],Gate1);
console.log(Get);

edited Dec 18, 2016 at 12:17

answered Dec 18, 2016 at 11:10

SLePort

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1 Comment

jon Over a year ago

Thank you for sharing this friend. It's a very interesting way.

Hikmat Sijapati · Accepted Answer · 2016-12-18 08:56:15Z

0

Try this...Use JSON.stringify()

Gate1 = [];
Gate1 = [[3,4],[4,6]]; // [[ItemID,NbItem],[ItemID,NbItem]]

function check(ID, NEED, GVariable) {
for (var F=0; F<ID.length; F++) {
var Founds = [ID[F],NEED[F]];
if (JSON.stringify(Founds) == JSON.stringify(GVariable[F])){
//return stop the loop, but i need to test all ID.length and return true or false in array it in array
        return true;
        }
        else {return false;}
    }
}
var Get = check([3,4,10,11],[4,6,8,7],Gate1);
console.log(Get); //need to be ===  Get[[true,true,false,false]] 
alert("Gets= "+Get+'\n'+'But i want = [true,true,false,false]');

answered Dec 18, 2016 at 8:56

Hikmat Sijapati

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1 Comment

jon Over a year ago

JSON.stringify, nice found i will study this , is exact what i need.

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