I have a project using node.js. It's my first time using nodejs and I want to export an array to my app. Here is some code:
module.exports = {
var arrays = [];
arrays[0] = 'array 0';
arrays[1] = 'array 1';
arrays[2] = 'array 2';
arrays[3] = 'array 3';
arrays[4] = 'array 4';
var r_array = arrays[Math.floor(Math.random() * arrays.length)].toString();
}
At the end I want to use the var r_array in my app.js but I don't know how.
You'd want to define a function which returns the randomized portion of the array:
module.exports = {
getRArray: function() {
var arrays = [];
arrays[0] = 'array 0';
arrays[1] = 'array 1';
arrays[2] = 'array 2';
arrays[3] = 'array 3';
arrays[4] = 'array 4';
return arrays[Math.floor(Math.random()*arrays.length)];
}
};
Also you should embed the array into the function so it actually returns something.
module.exports needs to be an object.
Perhaps you're looking for something more like:
var arrays = [];
arrays[0] = 'array 0';
arrays[1] = 'array 1';
arrays[2] = 'array 2';
arrays[3] = 'array 3';
arrays[4] = 'array 4';
var r_array = arrays[Math.floor(Math.random()*arrays.length)].toString();
module.exports = r_array;
Please note that this code will only be run once, and that if you're hoping to get a different random value by executing the code multiple times, that you may want to set it up more like:
module.exports = function() {
return arrays[Math.floor(Math.random()*arrays.length)];
}
so that the Math.random() operation happens over and over.
You have two files, one is array.js and the other app.js. Consider doing this in array.js file:
const Array= [
'array 0',
'array 1',
'array 2',
'array 3',
'array 4']
exports.Array = Array
Now in your app.js do the following:
const { Array } = require("./array")
const randomArr = Array[Math.floor(Math.random()*Array.length)]
console.log(randomArr)
// I used randomArr instead of r_array because of JS conventions.
var arrays = [];
arrays[0] = 'array 0';
arrays[1] = 'array 1';
arrays[2] = 'array 2';
arrays[3] = 'array 3';
arrays[4] = 'array 4';
var r_array = arrays[Math.floor(Math.random()*arrays.length)].toString();
module.exports = r_array;
toString to the result. This means the value will be translated into a string, so you'll get a random string every time.Try it like this , if you are using type : "module" in package.json
const myArray = [
{
name: 'Cake',
value: 'cake'
},
{
name: 'Veg thali',
value: 'vegthali'
}
]
export default myArrayimport myArray from "./arrayfile.js"You can actually export an array directly, as array is also an object in javascript. Inside file that has the data (for ex, arrayData.js), you would have:
module.exports = [
{key1: 'abc', key2: 123},
{key1: 'def', key2: 456}
];
Then in the code that wants to import the array, you can do:
// import array data
const importedArrayData = require('arrayData.js');
// access array data, for ex, log 2nd element key2
console.log(importedArrayData[1].key2); // output: 456
const arrays = ["a", "b", /*etc*/ ];