![]() ![]() ![]() Here is the example that uses a forEach loop to loop through an array of objects. forEach loop executes a function for each element of the array and gives us access to the current element as well as the index within the function. type ValuesType = Ĭonst fields: InputTypes = intermittent. forEach method is a modern way of looping array in javascript. Now when I create the array of objects everything works if I explicitly define the relevant props on each object. Type InputTypes = InputText | InputNumeric | InputSelect OnChange: (value: string, id: string) => void I have defined the array of objects using a discriminated union of all the input field types (using fieldType). Each object has a prop fieldType that defines which component will be rendered. To handle different types of fields I have created a component for each one, along with its own typing. Objects contain all the props required by each field type. arr2 = arr1.slice() Īrr2 = copy(arr1) // Custom function needed, and provided aboveĪrr2 = _.cloneDeep(arr1) // Lo-dash.js neededĪrr2 = jQuery.extend(true,, arr1) // jQuery.I have an array of objects that I am using to define inputs fields that get rendered in a react app. How can I copy the array to get two independent arrays? Answerīecause arr1 is an array of literal values (boolean, number, or string), you can use any deep copy technique discussed above, where slice() and spread. I realized that arr2 refers to the same array as arr1, rather than a new, independent array. if (Object.is(aObject, aObject)) continue īObject = (typeof value = "object") ? copy(value) : value Prevent self-references to parent object Literal values (type1)Ĭonst stringPrototype = new String('true') Ĭonst objectPrototype = new Object() // or `new function () Three types of elementsĮlements can be: literal values, literal structures, or prototypes. ![]() In Javascript, deep-copy techniques depend on the elements in an array. ![]()
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