The following code is functioning properly:
for(let i=0;i< this.Array.length ; i++){
if(this.Array[i].propertyObject.hasOwnProperty('header'))
this.Array[i].ColumnName = this.Array[i].propertyObject.header;
}
I am interested in knowing how to achieve the same outcome using Map. Thank you in advance.
Can you explain how to achieve the same result using Map?
It seems like you are referring to map. However, using map will not exactly replicate the functionality of the loop you have provided. This is because the loop modifies the existing array, whereas map creates a new array.
If you prefer to create a new array, possibly with new objects (e.g., following functional programming or immutable programming methods):
// Create a new array by mapping each element in the current array
this.Array = this.Array.map(element => {
// If adjustments need to be made to this element...
if (element.propertyObject.hasOwnProperty("header")) {
// ...perform a shallow copy along with making the necessary changes
element = {...element, ColumnName: element.propertyObject.header};
}
return element;
});
Keep in mind that this method assumes the elements in the array are simple objects. If they are more complex, you will need to handle constructing the replacements differently than just using {...original}.
However, if you wish to retain the original array as your current code does, the loop you currently have is sufficient. While alternatives such as forEach or for-of exist, what you have implemented works well. for-of is particularly suitable for your requirements:
for (const element of this.Array) {
if (element.propertyObject.hasOwnProperty("header")) {
element.ColumnName = element.propertyObject.header;
}
}
Additional note: In newer code, consider utilizing Object.hasOwn instead of Object.prototype.hasOwnProperty (including a polyfill if necessary for older environments; most modern browsers now support it natively).
Using the forEach method, we iterate through each item in the Array and check if it has a property called "header". If it does, we assign its value to the item's ColumnName property; otherwise, we keep the original value of item.ColumnName.
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