const option = {
    root: null,
    rootMargin: '0px',
    threshold: 0.7, // or an array [0.1, 0.2, ...]
};

const callback = (entries, observer) => {
    entries.forEach((entry) => {
        // Each entry describes an intersection change for one observed
        // target element:
        //   entry.boundingClientRect
        //   entry.intersectionRatio
        //   entry.intersectionRect
        //   entry.isIntersecting
        //   entry.rootBounds
        //   entry.target
        //   entry.time
    });
};
const observer = new IntersectionObserver(callBack, option);

observer.observer(nodeOne); //observing only nodeOne
observer.observer(nodeTwo); //observing both nodeOne and nodeTwo
observer.unobserve(nodeOne); //observing only nodeTwo
observer.disconnect(); //not observing any node

int longestCommonSubsequence(string text1, string text2) {
    if(text1.size() == 0 || text2.size() == 0 ){
        return 0;
    }

    if(text1[0] == text2[0]){
        return 1 + longestCommonSubsequence(text1.substr(1, text1.size()-1), text2.substr(1, text1.size()-1));
    }

    return max(longestCommonSubsequence(text1, text2.substr(1, text1.size()-1)),
            longestCommonSubsequence(text1.substr(1, text1.size()-1), text2));
}

<template>
    <div></div>
</template>
<script>
    export default {
        name: '',
        props: [...],
        data() {
            return {};
        },
        computed:{
            ...
        }
        methods: {
            ...
        }
    };
</script>
<style lang="css"></style>

let arr = [1, 2, 3, 4, 5];

let objFromArr1 = Object.assign({}, arr);

let objFromArr2 = { ...arr };

console.log(objFromArr1); // { '0': 1, '1': 2, '2': 3, '3': 4, '4': 5 }

console.log(objFromArr2); // { '0': 1, '1': 2, '2': 3, '3': 4, '4': 5 }

let pair = [
  ['key1', 'val1'],
  ['key2', 'val2'],
]; // Map works as well

let objFromPair = Object.fromEntries(arr); // ES10

console.log(objFromPair); //{ key1: 'val1', key2: 'val2' }

# Capitalize string
print(s.capitalize())

# Make all uppercase
print(s.upper())

# Make all lower
print(s.lower())

# Swap case
print(s.swapcase())

# Get length
print(len(s))

# Replace
print(s.replace('world', 'everyone'))

# Count
sub = 'h'
print(s.count(sub))

# Starts with
print(s.startswith('hello'))

# Ends with
print(s.endswith('d'))

# Split into a list
print(s.split())

# Find position
print(s.find('r'))

# Is all alphanumeric
print(s.isalnum())

# Is all alphabetic
print(s.isalpha())

# Is all numeric
print(s.isnumeric())