# Script:
# Slice a array into N:
const array = [1,2,3,5,6];
const slicedArray = array.slice(0, n); // [1,2,3]
const score = function(){
return 100;
}
let names = [
{name:"Hasan",title:"hasan",count:[10,20,30]},
{name:"Abdul",title:"hasan",count:[50,80,30]},
{name:"Karim",title:"hasan",count:[20,20,90]}
]
let surnames = {
name:['khan','rahman','haque']
};
// Sum up all the count:
const sumOfFirstIndex = names[0].count.reduce((oldValue,newValue) => oldValue+newValue);
console.log("Sum of first index :",sumOfFirstIndex);
let totalSum = 0;
names.forEach((obj) => {
totalSum += obj.count.reduce((accumulator, currentValue) => accumulator + currentValue, 0);
});
console.log("Total sum of count:", totalSum);
// Replace all with their total sum:
let modifiedNames = JSON.parse(JSON.stringify(names)); // Create a deep copy of the names array
modifiedNames.forEach((obj) => {
const totalSum = obj.count.reduce((accumulator, currentValue) => accumulator + currentValue, 0);
obj.count = totalSum;
});
console.log("Replace all with their total sum:", modifiedNames);
// Type 01:
console.log(names[0].count[0]);
// Type 02:
names[0].count.map((data)=>{
console.log(data);
})
// Type 03:
names.map((data)=>{
console.log("Name :",data.name,"Title :",data.title);
console.log("Count of name:")
data.count.map((data)=>{
console.log(data);
})
})
// Filter out the data with name "Karim":
const withoutKarim = names.filter((res)=>{
return res.name !== 'Karim'
});
console.log("Without Karim :");
console.log(withoutKarim);
// Find name "Abdul" and delete it:
// Hint: Find the index , then use splice
const indexOfAbdul = names.findIndex((obj)=>{
return obj.name === "Abdul";
});
console.log("Index of Abdul is:",indexOfAbdul);
names.splice(indexOfAbdul,1);
console.log("After deletion:",names);
// Best practice:
if (indexOfAbdul !== -1) {
names.splice(indexOfAbdul, 1);
}
let array = [
{ id: 1, name: 'Hasan' },
{ id: 2, name: 'Abdul' },
{ id: 3, name: 'Karim' },
];
const specificId = 1;
let filter = array.filter(item => item.id === specificId);
console.log(filter);
export default score;