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map ts

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unel answered on October 15, 2022 Popularity 10/10 Helpfulness 2/10

answer map ts

related map typescript

related map ts

map ts

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const map1 = new Map();

map1.set('a', 1);
map1.set('b', 2);
map1.set('c', 3);

console.log(map1.get('a'));
// expected output: 1

map1.set('a', 97);

console.log(map1.get('a'));
// expected output: 97

console.log(map1.size);
// expected output: 3

map1.delete('b');

console.log(map1.size);
// expected output: 2

Popularity 10/10 Helpfulness 2/10 Language typescript

Source: developer.mozilla.org

Tags: map typescript

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Contributed on Oct 15 2022

unel

0 Answers Avg Quality 2/10

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map typescript

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Create Empty Map
let myMap = new Map<string, number>();
myMap.set('a', 1);
myMap.set('b', 2);
myMap.set('c', 3);

console.log(myMap.get('a'));
// expected output: 1

myMap.set('a', 97);

Popularity 10/10 Helpfulness 4/10 Language typescript

Source: howtodoinjava.com

Tags: map

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Contributed on Nov 01 2022

unel

0 Answers Avg Quality 2/10

map ts

Comment

Creating map with initial key-value pairs
let myMap = new Map<string, string>([
        ["key1", "value1"],
        ["key2", "value2"]
    ]);

Popularity 7/10 Helpfulness 3/10 Language typescript

Source: howtodoinjava.com

Tags: map typescript

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Contributed on Aug 08 2024

Murtin

0 Answers Avg Quality 2/10

map ts

Comment

Iterating over keys and values in a Map
let nameAgeMapping = new Map<string, number>();
 
nameAgeMapping.set("Lokesh", 37);
nameAgeMapping.set("Raj", 35);
nameAgeMapping.set("John", 40);

//1. Iterate over map keys

for (let key of nameAgeMapping.keys()) {
    console.log(key);                   //Lokesh Raj John
}

//2. Iterate over map values
for (let value of nameAgeMapping.values()) {
    console.log(value);                 //37 35 40
}

//3. Iterate over map entries
for (let entry of nameAgeMapping.entries()) {
    console.log(entry[0], entry[1]);    //"Lokesh" 37 "Raj" 35 "John" 40
}

//4. Using object destructuring
for (let [key, value] of nameAgeMapping) {
    console.log(key, value);            //"Lokesh" 37 "Raj" 35 "John" 40
}

Popularity 7/10 Helpfulness 2/10 Language typescript

Source: howtodoinjava.com

Tags: map typescript

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Contributed on Aug 08 2024

Murtin

0 Answers Avg Quality 2/10

map ts

Comment

Create Empty Map
let myMap = new Map<string, number>();

Popularity 6/10 Helpfulness 1/10 Language typescript

Source: howtodoinjava.com

Tags: map typescript

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Contributed on Aug 08 2024

Murtin

0 Answers Avg Quality 2/10

map ts

Comment

Map Operations
let nameAgeMapping = new Map<string, number>();

//1. Add entries
nameAgeMapping.set("Lokesh", 37);
nameAgeMapping.set("Raj", 35);
nameAgeMapping.set("John", 40);

//2. Get entries
let age = nameAgeMapping.get("John");		// age = 40

//3. Check entry by Key
nameAgeMapping.has("Lokesh");		        // true
nameAgeMapping.has("Brian");		        // false

//4. Size of the Map
let count = nameAgeMapping.size; 	        // count = 3

//5. Delete an entry
let isDeleted = nameAgeMapping.delete("Lokesh");	        // isDeleted = true

//6. Clear whole Map
nameAgeMapping.clear();				//Clear all entries

Popularity 7/10 Helpfulness 1/10 Language typescript

Source: howtodoinjava.com

Tags: map typescript

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Contributed on Aug 08 2024

Murtin

0 Answers Avg Quality 2/10

map ts

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