I need to keep { label: "Strawberry 🍓", value: "strawberry"}, for this code to work with
the in react though when submitting to the database i would like to have the selected values sent through as strawberry: true, watermelon: true, pear: true,
const options = [
{ label: "Strawberry 🍓", value: "strawberry"},
{ label: "Watermelon 🍉", value: "watermelon" },
{ label: "Pear 🍐", value: "pear" },
]
I would like to convert the above array to an array of
const newArray = [
strawberry: true
watermelon: true
pear: true
]
I would have a clue how you would do it maybe it's a two step thing?
If you really mean an object {strawberry: true, watermelon: true, pear: true} (an associative array), not an Array,
const options = [
{ label: "Strawberry 🍓", value: "strawberry"},
{ label: "Watermelon 🍉", value: "watermelon" },
{ label: "Pear 🍐", value: "pear" },
];
const optionsObject = {};
options.forEach(({value}) => optionsObject[value] = true);
(You can also do this with .reduce if you really want to:)
const optionsObject = options.reduce((obj, {value}) => {
obj[value] = true;
return obj;
}, {});
Related
I want to loop through an array to generate a customized object array
const frequencies = [
{
value: "none",
label: "None",
},
{
value: "1_month",
label: "1 month",
},
{
value: "2_month",
label: "2 month",
},
];
const loop = {[...new Array(10)].map((_, index) => {
return [
{
value: index,'month',
label: index,'month',
},
];
})}
You're assigning a object {} to the loop variable which you then try to add a array to without a key. This is not working. When returning from the map function you return a array [].
You can use the index in a string with the `${index} month` syntax:
const loop = [...new Array(10)].map((_, index) => {
return [
{
value: `${index}_month`,
label: `${index} month`,
},
];
});
console.log(loop);
I have one list look like allsettings. I want to convert that list to a new list. Since I am new to react I don't have much idea, I tried by doing the below way but 1st item in the new list is always empty.
const [mySetting, setMySet] = useState([]);
useEffect(() => {
const allSettings = [
{ name: "Setting1", value: true, label: 1 },
{ name: "Setting2", value: true, label: 2 },
{ name: "Setting3", value: true, label: 3 },
{ name: "Setting4", value: false, label: 4 },
{ name: "Setting5", value: true, label: 5 },
{ name: "Setting6", value: true, label: 6 },
{ name: "Setting7", value: true, label: 7 }
];
const settings = [];
const allSettingsMap = allSettings.reduce((resMap, current) => {
settings.push(resMap);
return {
...resMap,
SettingID: current.label,
Name: current.name,
value: current.value
};
}, {});
setMySet(settings);
}, []);
//I want new list like this:
const newSettings = [
{ name: "Setting1", value: true, SettingID: 1 },
{ name: "Setting2", value: true, SettingID: 2 },
{ name: "Setting3", value: true, SettingID: 3 },
{ name: "Setting4", value: false, SettingID: 4 },
{ name: "Setting5", value: true, SettingID: 5 },
{ name: "Setting6", value: true, SettingID: 6 },
{ name: "Setting7", value: true, SettingID: 7 }
];
You can use array#map to rename a key in your object and keeping other keys intact. For each object, you can pick label and rename it to SettingID and keep other key-values same.
const allSettings = [ { name: "Setting1", value: true, label: 1 }, { name: "Setting2", value: true, label: 2 }, { name: "Setting3", value: true, label: 3 }, { name: "Setting4", value: false, label: 4 }, { name: "Setting5", value: true, label: 5 }, { name: "Setting6", value: true, label: 6 }, { name: "Setting7", value: true, label: 7 } ],
result = allSettings.map(({label, ...other}) => ({...other, SettingID: label}));
console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }
You can easily do it by map on array
const allSettings = [
{ name: "Setting1", value: true, label: 1 },
{ name: "Setting2", value: true, label: 2 },
{ name: "Setting3", value: true, label: 3 },
{ name: "Setting4", value: false, label: 4 },
{ name: "Setting5", value: true, label: 5 },
{ name: "Setting6", value: true, label: 6 },
{ name: "Setting7", value: true, label: 7 }
];
const newAllSettings = allSettings.map(item => {
return {
name: item.name,
value: item.value,
SettingID:item.label
};
});
console.log(newAllSettings)
Replace your allSettings.reduce method with this map method
const settings = [];
allSettings.map((setting) => {
const item = { ...setting };
const tempValue = item?.label;
// delete item label
delete item["label"];
item["SettingID"] = tempValue;
settings.push(item);
});
I have the following array. I am using this array to dynamically produce checkboxes on my UI. This is being used to save user config as to what they will be able to see in a nav menu.
accessLevels: any = [
{
description: "Properties",
type: '1',
selected: false
},
{
description: "Equipment",
type: '2',
selected: false
},
{
description: "Jobs",
type: '3',
selected: false
},
{
description: "Calender",
type: '4',
selected: false
}
]
I am making a call to an API which returns me an array of the users config. So what I will get is an array of the pages and their type like this:
{
description: "Equipment",
type: '2'
},
{
description: "Jobs",
type: '3'
}
In the array returned from the API I am just getting the values that should appear checked on the check boxes so what I want to do is loop through the returned array and check if any of the types match any types in the checkbox array if they do I want to set 'selected' to true. Thus checking the checkbox.
Here is what I have so far:
async loadLandlordConfig(key: string) {
const result = await this.userService.loadLandlordConfig(key);
//let accessLevels = [];
this.selectedApiValues = result[0].accessLevels;
this.selectedApiValues.forEach((selectedValue)=> {
});
}
Im not sure how to cross check the values and then change selected to true.
Hope I have made everything clear enough.
Any questions please ask. All help appreciated.
const accessLevels: any[] = [
{
description: 'Properties',
type: '1',
selected: false
},
{
description: 'Equipment',
type: '2',
selected: false
},
{
description: 'Jobs',
type: '3',
selected: false
},
{
description: 'Calender',
type: '4',
selected: false
}];
const results: any[] = [
{
description: 'Equipment',
type: '2'
},
{
description: 'Jobs',
type: '3'
}];
accessLevels.forEach(accessLevel => {
accessLevel.selected = results.some(x => x.type === accessLevel.type); });
For small arrays
You can check for the existence within a filter using some:
const intersect = this.array1.filter(a1 =>
this.array2.some(a2 => a1.type === a2.type));
The problem with this is that you are doing multiple loops through array 2.
For larger arrays
To keep your loops to a constant number, you could create a map of one of your arrays, and check that within a filter of the other array:
const map2 = new Map(this.array2.map(x => [x.type, s]));
const intersect = this.array1.filter(a1 =>
map.has(a1.type));
This adds a little bit of complexity, but is more efficient for all but the simplest cases.
You can achieve what you want with the following simple example :
let accessLevels = [
{
description: "Properties",
type: '1',
selected: false
},
{
description: "Equipment",
type: '2',
selected: false
},
{
description: "Jobs",
type: '3',
selected: false
},
{
description: "Calender",
value: '4',
selected: false
}
]
let api = [
{
description: "Equipment",
type: '2'
},
{
description: "Jobs",
value: '3'
}
];
for(var i = 0; i < accessLevels.length; i++) {
accessLevels[i].selected = api.find(e => e.description === accessLevels[i].description) ? true : false;
}
console.log(accessLevels);
You can use Map collection to have O(1) while mapping the second array:
const unique = new Map(received.map(s => [s.description, s]));
const result = accessLevels.map(({ description, type})=>
({selected: (unique.get(description) ? true : false), type, description}))
An example:
let accessLevels = [
{
description: "Properties",
type: '1',
selected: false
},
{
description: "Equipment",
type: '2',
selected: false
},
{
description: "Jobs",
type: '3',
selected: false
},
{
description: "Calender",
type: '4',
selected: false
}
]
const received = [
{
description: "Equipment",
type: '2'
},
{
description: "Jobs",
value: '3'
}
];
const unique = new Map(received.map(s => [s.description, s]));
const result = accessLevels.map(({ description, type})=>
({selected: (unique.get(description) ? true : false), type, description}))
console.log(result);
I've made some changes to your code. Here's how it looks like:
async loadLandlordConfig(key: string) {
const result = await this.userService.loadLandlordConfig(key);
// assuming there's always a result.
// ACCESS_LEVELS is the list of your config.
accessLevels = result[0].accessLevels;
this.selectedApiValues = ACCESS_LEVELS.map((al: any) => {
const selected = accessLevels.findIndex(a => a.type === al.type) > -1;
return { ...al, selected }
})
}
This will give you with the value
this.selectedApiValues = [
{
description: "Properties",
type: '1',
selected: false
},
{
description: "Equipment",
type: '2',
selected: true
},
{
description: "Jobs",
type: '3',
selected: true
},
{
description: "Calender",
type: '4',
selected: false
}
]
Given is following data structure
const list = [
{
title: 'Section One',
data: [
{
title: 'Ay',
},
{
title: 'Bx',
},
{
title: 'By',
},
{
title: 'Cx',
},
],
},
{
title: 'Section Two',
data: [
{
title: 'Ay',
},
{
title: 'Bx',
},
{
title: 'By',
},
{
title: 'Cx',
},
],
},
];
What i want to do ist to filter this list based on title property in the data array of each object.
An example would be to have the list where the title property of the childs starts with "B", so the list will look like that:
const filteredList = [
{
title: 'Section One',
data: [
{
title: 'Bx',
},
{
title: 'By',
}
],
},
{
title: 'Section Two',
data: [
{
title: 'Bx',
},
{
title: 'By',
}
],
},
];
What i tried so far was something like that:
const items = list.filter(item =>
item.data.find(x => x.title.startsWith('A')),
);
or
const filtered = list.filter(childList => {
childList.data.filter(item => {
if (item.title.startsWith('B')) {
return item;
}
return childList;
});
});
But i think i am missing a major point here, maybe some of you could give me a tip or hint what i am doing wrong
Best regards
Your issue is that you're doing .filter() on list. This will either keep or remove your objects in list. However, in your case, you want to keep all objects in list and instead map them to a new object. To do this you can use .map(). This way you can map your objects in your list array to new objects which contain filtered data arrays. Here's an example of how you might do it:
const list=[{title:"Section One",data:[{title:"Ay"},{title:"Bx"},{title:"By"},{title:"Cx"}]},{title:"Section Two",data:[{title:"Ay"},{title:"Bx"},{title:"By"},{title:"Cx"}]}];
const filterByTitle = (search, arr) =>
arr.map(
({data, ...rest}) => ({
...rest,
data: data.filter(({title}) => title.startsWith(search))
})
);
console.log(filterByTitle('B', list));
In api return value like this,
[
"Action",
"Comedy",
"Documentary",
"Drama"
]
I need to modify the above array like this,
const techCompanies = [
{ label: "Action", value: 1 },
{ label: "Comedy", value: 2 },
{ label: "Documentary", value: 3 },
{ label: "Drama", value: 4 }
];
I used Axios to get data,
const response = await axios.get("http://localhost:3000/Movie/v1.0/genre");
This is an array so you can you use the .map() function to do that:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map
const arr = ["Action", "Comedy", "Documentary", "Drama"];
arr.map((arrElement, index) => ({ label: arrElement, value: index }));