Iterating over Immutable JS Map
up vote
1
down vote
favorite
Consider this code:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toJS());
// prnts {a: "Hello 1", b: "Hello 2", c: "Hello 3"}
I want the output as ['Hello1', 'Hello2, 'Hello3'], but map is giving me an object with the keys also. Why am I not getting an array as output like a normal JavaScript map works? And what is the best way to achieve the desired result? (I can use forEach instead of map, and push the result of each iteration in an array, but I am looking for a better method).
javascript immutable.js
asked Nov 21 at 10:19
maverick
546723
add a comment |
up vote
1
down vote
favorite
Consider this code:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toJS());
// prnts {a: "Hello 1", b: "Hello 2", c: "Hello 3"}
I want the output as ['Hello1', 'Hello2, 'Hello3'], but map is giving me an object with the keys also. Why am I not getting an array as output like a normal JavaScript map works? And what is the best way to achieve the desired result? (I can use forEach instead of map, and push the result of each iteration in an array, but I am looking for a better method).
javascript immutable.js
asked Nov 21 at 10:19
maverick
546723
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
Consider this code:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toJS());
// prnts {a: "Hello 1", b: "Hello 2", c: "Hello 3"}
I want the output as ['Hello1', 'Hello2, 'Hello3'], but map is giving me an object with the keys also. Why am I not getting an array as output like a normal JavaScript map works? And what is the best way to achieve the desired result? (I can use forEach instead of map, and push the result of each iteration in an array, but I am looking for a better method).
javascript immutable.js
asked Nov 21 at 10:19
maverick
546723
Consider this code:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toJS());
// prnts {a: "Hello 1", b: "Hello 2", c: "Hello 3"}
I want the output as ['Hello1', 'Hello2, 'Hello3'], but map is giving me an object with the keys also. Why am I not getting an array as output like a normal JavaScript map works? And what is the best way to achieve the desired result? (I can use forEach instead of map, and push the result of each iteration in an array, but I am looking for a better method).
javascript immutable.js
javascript immutable.js
asked Nov 21 at 10:19
maverick
546723
asked Nov 21 at 10:19
maverick
546723
asked Nov 21 at 10:19
maverick
546723
asked Nov 21 at 10:19
maverick
546723
asked Nov 21 at 10:19
maverick
546723
546723
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
up vote
1
down vote
accepted
Use toArray() instead toJS():
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toArray());<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 10:36
Grzesiek Danowski
1905
add a comment |
up vote
0
down vote
You can get the array by simply using myMap.keys
Array.from(myMap.keys());
Runnable code snippet for the same is as under:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(Array.from(myMap.keys()));
answered Nov 21 at 10:24
AurA
9,18853555
add a comment |
up vote
0
down vote
Just providing a different flavor using reduce
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.reduce((accumulator, value) => {
accumulator.push("Hello" + value);
return accumulator;
}, )
console.log(myMap);<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 14:04
jamesjaya
657412
add a comment |
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
Use toArray() instead toJS():
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toArray());<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 10:36
Grzesiek Danowski
1905
add a comment |
up vote
1
down vote
accepted
Use toArray() instead toJS():
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toArray());<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 10:36
Grzesiek Danowski
1905
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
Use toArray() instead toJS():
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toArray());<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 10:36
Grzesiek Danowski
1905
Use toArray() instead toJS():
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toArray());<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toArray());<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(myMap.toArray());<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 10:36
Grzesiek Danowski
1905
answered Nov 21 at 10:36
Grzesiek Danowski
1905
answered Nov 21 at 10:36
Grzesiek Danowski
1905
answered Nov 21 at 10:36
Grzesiek Danowski
1905
1905
add a comment |
add a comment |
up vote
0
down vote
You can get the array by simply using myMap.keys
Array.from(myMap.keys());
Runnable code snippet for the same is as under:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(Array.from(myMap.keys()));
answered Nov 21 at 10:24
AurA
9,18853555
add a comment |
up vote
0
down vote
You can get the array by simply using myMap.keys
Array.from(myMap.keys());
Runnable code snippet for the same is as under:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(Array.from(myMap.keys()));
answered Nov 21 at 10:24
AurA
9,18853555
add a comment |
up vote
0
down vote
up vote
0
down vote
You can get the array by simply using myMap.keys
Array.from(myMap.keys());
Runnable code snippet for the same is as under:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(Array.from(myMap.keys()));
answered Nov 21 at 10:24
AurA
9,18853555
You can get the array by simply using myMap.keys
Array.from(myMap.keys());
Runnable code snippet for the same is as under:
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.map((elem, index) => {
return "Hello " + elem;
})
console.log(Array.from(myMap.keys()));
answered Nov 21 at 10:24
AurA
9,18853555
edited Nov 21 at 10:43
answered Nov 21 at 10:24
AurA
9,18853555
answered Nov 21 at 10:24
AurA
9,18853555
answered Nov 21 at 10:24
AurA
9,18853555
9,18853555
add a comment |
add a comment |
up vote
0
down vote
Just providing a different flavor using reduce
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.reduce((accumulator, value) => {
accumulator.push("Hello" + value);
return accumulator;
}, )
console.log(myMap);<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 14:04
jamesjaya
657412
add a comment |
up vote
0
down vote
Just providing a different flavor using reduce
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.reduce((accumulator, value) => {
accumulator.push("Hello" + value);
return accumulator;
}, )
console.log(myMap);<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 14:04
jamesjaya
657412
add a comment |
up vote
0
down vote
up vote
0
down vote
Just providing a different flavor using reduce
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.reduce((accumulator, value) => {
accumulator.push("Hello" + value);
return accumulator;
}, )
console.log(myMap);<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 14:04
jamesjaya
657412
Just providing a different flavor using reduce
const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.reduce((accumulator, value) => {
accumulator.push("Hello" + value);
return accumulator;
}, )
console.log(myMap);<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.reduce((accumulator, value) => {
accumulator.push("Hello" + value);
return accumulator;
}, )
console.log(myMap);<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>const map1 = Immutable.Map({a:1, b:2, c:3});
const myMap = map1.reduce((accumulator, value) => {
accumulator.push("Hello" + value);
return accumulator;
}, )
console.log(myMap);<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js"></script>answered Nov 21 at 14:04
jamesjaya
657412
answered Nov 21 at 14:04
jamesjaya
657412
answered Nov 21 at 14:04
jamesjaya
657412
answered Nov 21 at 14:04
jamesjaya
657412
657412
add a comment |
add a comment |
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