Can someone please guide me on how to use the reduce array method to sort entries by date in the following data:
const entries = [
{date: 'lu'},
{date: 'lu'},
{date: 'ma'},
{date: 'ma'}
]
I would like the output to show the count of each date occurrence as follows:
const data = [
{x: 'lu', y: 2},
{x: 'ma', y: 2},
{x: 'me', y: 0},
{x: 'je', y: 0},
{x: 've', y: 0},
{x: 'sa', y: 0},
{x: 'di', y: 0},
]
Any assistance will be greatly appreciated. Thank you :)
To handle this scenario, utilizing two nested forEach loops is the way to go. This approach ensures that you have both the x and y values for each day, even if they are not initially present in the entries. Using reduce won't suffice in this case.
Therefore, it's important to establish a starting data array containing objects for each day. Then iterate through the entries for every individual day.
const entries = [
{date: 'lu'},
{date: 'lu'},
{date: 'ma'},
{date: 'ma'}
]
const data = [
{x: 'lu', y: 0},
{x: 'ma', y: 0},
{x: 'me', y: 0},
{x: 'je', y: 0},
{x: 've', y: 0},
{x: 'sa', y: 0},
{x: 'di', y: 0},
]
entries.forEach(entry => {
data.forEach(d => {
if(d.x === entry.date){
d.y++
}
})
})
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