time chaing class code puzzle solution

timeChaining_Solution.js

const timeData = [{
	"name" : "lect1",
    "time": "2:20"
}, {
	"name" : "lect2",
    "time": "3:30"
}, {
	"name" : "lect1",
    "time": "4:40"
}, {
	"name" : "lect3",
    "time": "3:30"
}];

//select all objects having lect1
const filtered = timeData.filter(item => item.name.includes("lect1") )
//and make an array of only their time strings
.map(item=>item.time)
//convert the time string into array of added seconds
.map(timeData => {
	console.log(timeData)
	const parts = timeData.split(":").map(part => parseFloat(part))
	return ( parts[0]*60 ) + parts[1]
})
//finally use reduce to display total time of lect 1.
.reduce((prev,current)=> prev+current ,0)

console.log(filtered)