Develop Reference

Create options list for react Select from single dimension array [closed]

Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 6 months ago.
Improve this question
I have an array like [ 123, 456 ] and it needs to be mapped into a react Select with label and value pairs so the "options" will be:
0: {label: "123", value: 123}
1: {label: "456", value: 456}
I just can't seem to get the map syntax to work for the source array (i.e. 0: 123, 1: 456)

You can write like this:
array.map((item)=> <Option label={item} value={item}/>)
This return an array of holding options with your label and value

If you need the options array you can write this:
let Myarray= [ 123, 456 ];
Myarray.map((item)=> <Option label={item} value={item}/>)
or If you need an array with label and value:
let Myarray= [ 123, 456 ];
let FinalArray=[];
Myarray.map((item)=>[...FinalArray,{label:item,value:item}])
if you want to put " to value
let Myarray= [ 123, 456 ];
let FinalArray=[];
Myarray.map((item)=>[...FinalArray,{label:item.toString(),value:item}])

Change array elements [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 8 months ago.
Improve this question
There is an array
[ [ 'Alex', '167%' ],
[ 'Benjamin', '127%' ],
[ 'Elijah', '117%' ],
[ 'Liam', '136%' ],
[ 'Theodore', '135%' ],
[ 'Mia', '128%' ] ]
I need to make it look like this
[ 'Alex 167%',
'Benjamin 127%',
'Elijah 117%',
'Liam 136%',
'Theodore 135%',
'Mia 128%' ]
I need the elements of each nested array to be combined into a string and such a number of spaces are inserted between them so that the length of this string is 29 characters

You could use a map combined with padEnd
const items = [
['Alex', '167%'],
['Benjamin', '127%'],
['Elijah', '117%'],
['Liam', '136%'],
['Theodore', '135%'],
['Mia', '128%']
];
const combined = items.map(([name, percent]) =>
name.padEnd(29 - percent.length, ' ') + percent
);
console.log(combined);

How to iterate over these array objects? [closed]

Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 2 years ago.
Improve this question
let arr = [{
text: "first",
nodes: [{
text: "a1"
}, {
text: "a2"
}]
},
{
text: "Second",
nodes: [{
text: "b1"
}]
}, {
text: "Third",
nodes: [{
text: "c1"
}]
}
]
arr.map((el, index) => {
console.log(el.nodes[index])
})
How can I iterate over all the nodes which has different size of array objects.
I've tried iterating over them, but the index keeps incrementing and skip past the nodes

You can loop in a loop... like:
let answerObj=[];
arr.forEach(item=>{
let nodeList=[];
item.nodes.forEach(el => {
nodeList.push(el)
})
answerObj.push({ text: item.text, nodes: nodeList})
})
console.log(answerObj)
And this is what you get: Output
And you can output by [index] as well if you want.

How to delete particular elements in a array of objects [closed]

Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 4 years ago.
Improve this question
I have an array with multiple objects.How can i delete an element in a
object.
For example i have attached a image in that i need to delete
organization element.
Please help me out to fix.

var a = {name: 'pardeep', 'sirname': 'jain'}
delete a['name']
console.log(a);
Just use delete keyword for the key like this -
delete objectName['keyName']

Use the delete operator
const deleteAttribute = (array, attribute) => array.map(x => {
// Delete the attribute here
delete x[attribute];
return x;
});
const arr = [{
attr: 'hello',
color: 'red',
organization: 'Good'
}, {
attr: 'world',
color: 'blue',
organization: 'bad'
}];
console.log(deleteAttribute(arr, 'organization'));

You can use map and delete like below
var arr = [{
name: 'hi',
test: 'x',
organization: 'X'
}, {
name: 'guys',
test: 'y',
organization: 'Y'
}];
console.log(arr.map(x => { delete x.organization; return x}));

changing the structure of javascript object [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 5 years ago.
Improve this question
My current object is of the form:
[{Vol:'AB', freq:[{used:4786, avail:1319, res:249}]}
,{Vol:'CD', freq:[{used:1101, avail:412, res:674}]}]
I need to change it to the form:
[{Vol:'AB', freq:{used:4786, avail:1319, res:249}}
,{Vol:'CD', freq:{used:1101, avail:412, res:674}}]
How can this be done.

Try
obj.map( s => (s.freq = s.freq[0], s) );
Explanation
Iterate the array using map
Replace each items freq's array with its first item
Demo
var input = [{
Vol: 'AB',
freq: [{
used: 4786,
avail: 1319,
res: 249
}]
}, {
Vol: 'CD',
freq: [{
used: 1101,
avail: 412,
res: 674
}]
}];
input = input.map(s => (s.freq = s.freq[0], s));
console.log(input);