What is the best way to iterate through an object of objects in Vue.js using mapping?

Question

What is the best way to iterate through an object of objects in Vue.js using mapping?

I am looking to develop a function that maps different items to specific color thresholds. Here is an example of what I have in mind:

export const mapMetricsToValue: any = {
    item1: {
        0: 'green--text',
        0.3: 'red--text',
        0.45: 'orange--text',
    },
    item2:{
        0: 'yellow--text',
        0.5: 'blue--text',
        0.65: 'purple--text',
    }
};

export function getTextClass(metric: string, value: Number): string {
    return mapMetricsToValue(metric,value);
}

The concept here is to have different items (like item1, item2, etc.) each with their own thresholds for color assignment. For instance, for item1:

-if (0<item1<0.3) it should return green, 
-if(0.3<item1<0.45) it should return red,
-else it should return orange

Similarly, item2 would have a different set of thresholds and colors. The goal is to have a function (getTextClass) that returns the appropriate color based on the item and its threshold.

I would appreciate any assistance with this. Thank you!

javascript typescript vue.js vuetify.js

Answer 1

Answer №1

My recommendation would be to always follow a structured approach and define interfaces for better organization. I suggest abstracting Metric and its container into interfaces as shown below:

export interface Metric {
    lowerBound: number;
    color: string;
}

export interface MetricItem {
    name: string;
    metrics: Metric[];
}

This approach allows for easier reference to specific values by name when needed in the future. To implement this, we can create a mapMetricsToValue array like this:

export const mapMetricsToValue: MetricItem[] = [
    {
        name: 'item1',
        metrics: [
            {
                lowerBound: 0,
                color: 'green'
            },
            {
                lowerBound: 0.3,
                color: 'red'
            }, //...
        ]
    },
    {
        name: 'item2',
        metrics: [
            {
                lowerBound: 0,
                color: 'yellow'
            } //...
        ]
    }
];

Mapping a color to a specific value is then easily achieved by iterating over the array of values for a given MetricItem and checking if the value falls within the specified range defined by the lowerBound values. It is important to ensure that the values are sorted by lowerBound in ascending order for this method to work correctly, but sorting can be done using another function if needed.

export function getTextClass(metric: MetricItem, value: number) : string {
    let metrics = metric.metrics;
    let len = metrics.length;

    for(let i = 0; i < len; i++) {
        let currentMetric = metrics[i];

        if(i === len - 1) {
            return currentMetric.color;
        }

        let nextMetric = metrics[i + 1];

        if(currentMetric.lowerBound <= value && nextMetric.lowerBound > value) {
            return currentMetric.color;
        }
    }
}

To retrieve a specific metric based on its name, the following function can be used:

export function findMetricByName(name: string, metrics: MetricItem[]): MetricItem {
    return metrics.find(metric => metric.name === name);
}

Answer 2

My recommendation would be to always follow a structured approach and define interfaces for better organization. I suggest abstracting Metric and its container into interfaces as shown below:

export interface Metric {
    lowerBound: number;
    color: string;
}

export interface MetricItem {
    name: string;
    metrics: Metric[];
}

This approach allows for easier reference to specific values by name when needed in the future. To implement this, we can create a mapMetricsToValue array like this:

export const mapMetricsToValue: MetricItem[] = [
    {
        name: 'item1',
        metrics: [
            {
                lowerBound: 0,
                color: 'green'
            },
            {
                lowerBound: 0.3,
                color: 'red'
            }, //...
        ]
    },
    {
        name: 'item2',
        metrics: [
            {
                lowerBound: 0,
                color: 'yellow'
            } //...
        ]
    }
];

Mapping a color to a specific value is then easily achieved by iterating over the array of values for a given MetricItem and checking if the value falls within the specified range defined by the lowerBound values. It is important to ensure that the values are sorted by lowerBound in ascending order for this method to work correctly, but sorting can be done using another function if needed.

export function getTextClass(metric: MetricItem, value: number) : string {
    let metrics = metric.metrics;
    let len = metrics.length;

    for(let i = 0; i < len; i++) {
        let currentMetric = metrics[i];

        if(i === len - 1) {
            return currentMetric.color;
        }

        let nextMetric = metrics[i + 1];

        if(currentMetric.lowerBound <= value && nextMetric.lowerBound > value) {
            return currentMetric.color;
        }
    }
}

To retrieve a specific metric based on its name, the following function can be used:

export function findMetricByName(name: string, metrics: MetricItem[]): MetricItem {
    return metrics.find(metric => metric.name === name);
}

What is the best way to iterate through an object of objects in Vue.js using mapping?

Answer №1

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