Transform array sequences into their own unique sequences

Question

Transform array sequences into their own unique sequences

Reorder Array of List to Fit My Custom Order

Current Output:

[
    { "key": "DG Power Output", "value": "6.00", "unit": "kWh", },
    { "key": "DG Run Time", "value": "5999999952", "unit": "minutes", },
    { "key": "Fuel Level (Before)", "value": "8.00", "unit": "liters", }
]

Convert this into

[
    { "key": "Fuel Level (Before)", "value": "8.00", "unit": "liters", },
    { "key": "DG Run Time", "value": "5999999952", "unit": "minutes", },
    { "key": "DG Power Output", "value": "6.00", "unit": "kWh", }
]

javascript arrays angular typescript sorting

Answer 1

Answer №1

To organize the items in a specific order, you can use an object to define the desired sequence and then sort the data based on the defined property.

var items = [{ title: "DG Power Output", value: "6.00", unit: "kWh" }, { title: "DG Run Time", value: "5999999952", unit: "minutes" }, { title: "Fuel Level (Before)", value: "8.00", unit: "liters" }],
    order = { "Fuel Level (Before)": 1, "DG Run Time": 2, "DG Power Output": 3 };

items.sort(({ title: itemA }, { title: itemB }) => order[itemA] - order[itemB]);

console.log(items);

Answer 2

To organize the items in a specific order, you can use an object to define the desired sequence and then sort the data based on the defined property.

var items = [{ title: "DG Power Output", value: "6.00", unit: "kWh" }, { title: "DG Run Time", value: "5999999952", unit: "minutes" }, { title: "Fuel Level (Before)", value: "8.00", unit: "liters" }],
    order = { "Fuel Level (Before)": 1, "DG Run Time": 2, "DG Power Output": 3 };

items.sort(({ title: itemA }, { title: itemB }) => order[itemA] - order[itemB]);

console.log(items);

Answer 3

Answer №2

If we were to simplify things, one method would be to directly access the index of the array like this:

let data = [
    { "key": "DG Power Output", "value": "6.00", "unit": "kWh", },
    { "key": "DG Run Time", "value": "5999999952", "unit": "minutes", },
    { "key": "Fuel Level (Before)", "value": "8.00", "unit": "liters", }
]

Then,

let newData = [data[2], data[1], data[0]];

This approach will give you the desired output, although it comes with risks and potential errors.

Answer 4

If we were to simplify things, one method would be to directly access the index of the array like this:

let data = [
    { "key": "DG Power Output", "value": "6.00", "unit": "kWh", },
    { "key": "DG Run Time", "value": "5999999952", "unit": "minutes", },
    { "key": "Fuel Level (Before)", "value": "8.00", "unit": "liters", }
]

Then,

let newData = [data[2], data[1], data[0]];

This approach will give you the desired output, although it comes with risks and potential errors.

Answer 5

Answer №3

When it comes to sorting an array, the approach usually involves creating a function that compares two elements and determines their order based on specified criteria. This function should return a number less than 0 if the first element should come before the second, 0 if they are equal, and a number greater than 0 if the second element should come first. To sort in descending order, you can utilize this function with Array.prototype.sort in the following manner:

const sorter = (a, b) => {
    if (a.key == b.key) return 0; // maintain current order
    if (a.key > b.key) return -1; // arrange 'a' before 'b' for descending order
    return 1; // arrange 'b' before 'a' for descending order
};
const arr = [
    { "key": "DG Power Output", "value": "6.00", "unit": "kWh", },
    { "key": "DG Run Time", "value": "5999999952", "unit": "minutes", },
    { "key": "Fuel Level (Before)", "value": "8.00", "unit": "liters", }
];
console.log(arr.sort(sorter));

Answer 6

When it comes to sorting an array, the approach usually involves creating a function that compares two elements and determines their order based on specified criteria. This function should return a number less than 0 if the first element should come before the second, 0 if they are equal, and a number greater than 0 if the second element should come first. To sort in descending order, you can utilize this function with Array.prototype.sort in the following manner:

const sorter = (a, b) => {
    if (a.key == b.key) return 0; // maintain current order
    if (a.key > b.key) return -1; // arrange 'a' before 'b' for descending order
    return 1; // arrange 'b' before 'a' for descending order
};
const arr = [
    { "key": "DG Power Output", "value": "6.00", "unit": "kWh", },
    { "key": "DG Run Time", "value": "5999999952", "unit": "minutes", },
    { "key": "Fuel Level (Before)", "value": "8.00", "unit": "liters", }
];
console.log(arr.sort(sorter));

Transform array sequences into their own unique sequences

Answer №1

Answer №2

Answer №3

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