Delete Value in AsyncStorage React Native
0
I have a function for looking item exists or not.
addNewPerson(name) {
AsyncStorage.getItem('savedPersons', (err, result) => {
const name = [name];
if (result !== null) {
var newIds = JSON.parse(result).concat(name);
AsyncStorage.setItem('savedPersons', JSON.stringify(newIds));
console.log('Data Found', result);
} else {
AsyncStorage.setItem('savedPersons', JSON.stringify(name));
console.log('Data Added', name);
}
});
}
Now I want to delete some specific person in "savedPersons".
I Tried this code:
AsyncStorage.removeItem('savedPersons','Uzuner');
error text is : "callback is not a function."
How can I delete item in asycnStorage's array?
Solved:
I write this code for deleting item.
removePost = async (post_id) => {
try {
const posts = await AsyncStorage.getItem('savedPersons');
let postsFav = JSON.parse(posts);
const postsItems = postsFav.filter(function(e){ return e !== post_id });
// updating 'posts' with the updated 'postsItems'
await AsyncStorage.setItem('savedPersons', JSON.stringify(postsItems));
} catch(error) {
console.log('error: ', error);
}};
Thanks alot all users for replies.
javascript react-native
asked Dec 31 '18 at 11:14
Hasan Rıza UzunerHasan Rıza Uzuner
257
add a comment |
0
I have a function for looking item exists or not.
addNewPerson(name) {
AsyncStorage.getItem('savedPersons', (err, result) => {
const name = [name];
if (result !== null) {
var newIds = JSON.parse(result).concat(name);
AsyncStorage.setItem('savedPersons', JSON.stringify(newIds));
console.log('Data Found', result);
} else {
AsyncStorage.setItem('savedPersons', JSON.stringify(name));
console.log('Data Added', name);
}
});
}
Now I want to delete some specific person in "savedPersons".
I Tried this code:
AsyncStorage.removeItem('savedPersons','Uzuner');
error text is : "callback is not a function."
How can I delete item in asycnStorage's array?
Solved:
I write this code for deleting item.
removePost = async (post_id) => {
try {
const posts = await AsyncStorage.getItem('savedPersons');
let postsFav = JSON.parse(posts);
const postsItems = postsFav.filter(function(e){ return e !== post_id });
// updating 'posts' with the updated 'postsItems'
await AsyncStorage.setItem('savedPersons', JSON.stringify(postsItems));
} catch(error) {
console.log('error: ', error);
}};
Thanks alot all users for replies.
javascript react-native
asked Dec 31 '18 at 11:14
Hasan Rıza UzunerHasan Rıza Uzuner
257
1. load the string from storage and parse it into array 2. remove person from array 3. save stringified array to storage
– Chris G
Dec 31 '18 at 11:16
thank you. I will try this. Do you have any example code?
– Hasan Rıza Uzuner
Dec 31 '18 at 12:11
add a comment |
0
0
0
1
I have a function for looking item exists or not.
addNewPerson(name) {
AsyncStorage.getItem('savedPersons', (err, result) => {
const name = [name];
if (result !== null) {
var newIds = JSON.parse(result).concat(name);
AsyncStorage.setItem('savedPersons', JSON.stringify(newIds));
console.log('Data Found', result);
} else {
AsyncStorage.setItem('savedPersons', JSON.stringify(name));
console.log('Data Added', name);
}
});
}
Now I want to delete some specific person in "savedPersons".
I Tried this code:
AsyncStorage.removeItem('savedPersons','Uzuner');
error text is : "callback is not a function."
How can I delete item in asycnStorage's array?
Solved:
I write this code for deleting item.
removePost = async (post_id) => {
try {
const posts = await AsyncStorage.getItem('savedPersons');
let postsFav = JSON.parse(posts);
const postsItems = postsFav.filter(function(e){ return e !== post_id });
// updating 'posts' with the updated 'postsItems'
await AsyncStorage.setItem('savedPersons', JSON.stringify(postsItems));
} catch(error) {
console.log('error: ', error);
}};
Thanks alot all users for replies.
javascript react-native
asked Dec 31 '18 at 11:14
Hasan Rıza UzunerHasan Rıza Uzuner
257
I have a function for looking item exists or not.
addNewPerson(name) {
AsyncStorage.getItem('savedPersons', (err, result) => {
const name = [name];
if (result !== null) {
var newIds = JSON.parse(result).concat(name);
AsyncStorage.setItem('savedPersons', JSON.stringify(newIds));
console.log('Data Found', result);
} else {
AsyncStorage.setItem('savedPersons', JSON.stringify(name));
console.log('Data Added', name);
}
});
}
Now I want to delete some specific person in "savedPersons".
I Tried this code:
AsyncStorage.removeItem('savedPersons','Uzuner');
error text is : "callback is not a function."
How can I delete item in asycnStorage's array?
Solved:
I write this code for deleting item.
removePost = async (post_id) => {
try {
const posts = await AsyncStorage.getItem('savedPersons');
let postsFav = JSON.parse(posts);
const postsItems = postsFav.filter(function(e){ return e !== post_id });
// updating 'posts' with the updated 'postsItems'
await AsyncStorage.setItem('savedPersons', JSON.stringify(postsItems));
} catch(error) {
console.log('error: ', error);
}};
Thanks alot all users for replies.
javascript react-native
javascript react-native
asked Dec 31 '18 at 11:14
Hasan Rıza UzunerHasan Rıza Uzuner
257
asked Dec 31 '18 at 11:14
Hasan Rıza UzunerHasan Rıza Uzuner
257
edited Dec 31 '18 at 12:37
Hasan Rıza Uzuner
asked Dec 31 '18 at 11:14
Hasan Rıza UzunerHasan Rıza Uzuner
257
asked Dec 31 '18 at 11:14
Hasan Rıza UzunerHasan Rıza Uzuner
257
asked Dec 31 '18 at 11:14
Hasan Rıza UzunerHasan Rıza Uzuner
257
257
1. load the string from storage and parse it into array 2. remove person from array 3. save stringified array to storage
– Chris G
Dec 31 '18 at 11:16
thank you. I will try this. Do you have any example code?
– Hasan Rıza Uzuner
Dec 31 '18 at 12:11
add a comment |
1. load the string from storage and parse it into array 2. remove person from array 3. save stringified array to storage
– Chris G
Dec 31 '18 at 11:16
thank you. I will try this. Do you have any example code?
– Hasan Rıza Uzuner
Dec 31 '18 at 12:11
1. load the string from storage and parse it into array 2. remove person from array 3. save stringified array to storage
– Chris G
Dec 31 '18 at 11:16
1. load the string from storage and parse it into array 2. remove person from array 3. save stringified array to storage
– Chris G
Dec 31 '18 at 11:16
thank you. I will try this. Do you have any example code?
– Hasan Rıza Uzuner
Dec 31 '18 at 12:11
thank you. I will try this. Do you have any example code?
– Hasan Rıza Uzuner
Dec 31 '18 at 12:11
add a comment |
2 Answers
2
active
oldest
votes
1
AsyncStorage.removeItem is an asynchronous task which returns a promise or callback. Also, if you want to remove an element from the array then you need to get the array first,delete the element and push it back to the local storage. Something like this,
AsyncStorage.getItem("savedPersons")
.then(persons =>{
const index = persons.indexOf("Uzuner");
const modifiedPersons = persons.splice(index,1);
AsyncStorage.setItem("savedPersons",modifiedPersons)
.then(() => console.log(done))
.catch((error) => console.log("error"));
})
.catch(error => console.log("Error while retrieving the savePersons"));
answered Dec 31 '18 at 12:20
Swarup BamSwarup Bam
716
add a comment |
-1
try this
var savedPersons = JSON.parse(await AsyncStorage.getItem('savedPersons'));
let i = savedPersons.indexOf("Uzuner");
if(i > -1) {
savedPersons.splice(i, 1);
AsyncStorage.setItem('savedPersons', savedPersons);
}
answered Dec 31 '18 at 11:43
SiSaSiSa
8921720
I don't want to remove savedPersons all values. I want to delete a specific value. this codes is delete all records in savedPersons.
– Hasan Rıza Uzuner
Dec 31 '18 at 12:10
@HasanRızaUzuner sorry. I didn't understand correctly. I changed my code
– SiSa
Dec 31 '18 at 12:22
AsyncStorage.getItemis async, the rest of the code needs to go into its callback.
– Chris G
Dec 31 '18 at 12:58
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
AsyncStorage.removeItem is an asynchronous task which returns a promise or callback. Also, if you want to remove an element from the array then you need to get the array first,delete the element and push it back to the local storage. Something like this,
AsyncStorage.getItem("savedPersons")
.then(persons =>{
const index = persons.indexOf("Uzuner");
const modifiedPersons = persons.splice(index,1);
AsyncStorage.setItem("savedPersons",modifiedPersons)
.then(() => console.log(done))
.catch((error) => console.log("error"));
})
.catch(error => console.log("Error while retrieving the savePersons"));
answered Dec 31 '18 at 12:20
Swarup BamSwarup Bam
716
add a comment |
1
AsyncStorage.removeItem is an asynchronous task which returns a promise or callback. Also, if you want to remove an element from the array then you need to get the array first,delete the element and push it back to the local storage. Something like this,
AsyncStorage.getItem("savedPersons")
.then(persons =>{
const index = persons.indexOf("Uzuner");
const modifiedPersons = persons.splice(index,1);
AsyncStorage.setItem("savedPersons",modifiedPersons)
.then(() => console.log(done))
.catch((error) => console.log("error"));
})
.catch(error => console.log("Error while retrieving the savePersons"));
answered Dec 31 '18 at 12:20
Swarup BamSwarup Bam
716
add a comment |
1
1
1
AsyncStorage.removeItem is an asynchronous task which returns a promise or callback. Also, if you want to remove an element from the array then you need to get the array first,delete the element and push it back to the local storage. Something like this,
AsyncStorage.getItem("savedPersons")
.then(persons =>{
const index = persons.indexOf("Uzuner");
const modifiedPersons = persons.splice(index,1);
AsyncStorage.setItem("savedPersons",modifiedPersons)
.then(() => console.log(done))
.catch((error) => console.log("error"));
})
.catch(error => console.log("Error while retrieving the savePersons"));
answered Dec 31 '18 at 12:20
Swarup BamSwarup Bam
716
AsyncStorage.removeItem is an asynchronous task which returns a promise or callback. Also, if you want to remove an element from the array then you need to get the array first,delete the element and push it back to the local storage. Something like this,
AsyncStorage.getItem("savedPersons")
.then(persons =>{
const index = persons.indexOf("Uzuner");
const modifiedPersons = persons.splice(index,1);
AsyncStorage.setItem("savedPersons",modifiedPersons)
.then(() => console.log(done))
.catch((error) => console.log("error"));
})
.catch(error => console.log("Error while retrieving the savePersons"));
answered Dec 31 '18 at 12:20
Swarup BamSwarup Bam
716
answered Dec 31 '18 at 12:20
Swarup BamSwarup Bam
716
answered Dec 31 '18 at 12:20
Swarup BamSwarup Bam
716
answered Dec 31 '18 at 12:20
Swarup BamSwarup Bam
716
716
add a comment |
add a comment |
-1
try this
var savedPersons = JSON.parse(await AsyncStorage.getItem('savedPersons'));
let i = savedPersons.indexOf("Uzuner");
if(i > -1) {
savedPersons.splice(i, 1);
AsyncStorage.setItem('savedPersons', savedPersons);
}
answered Dec 31 '18 at 11:43
SiSaSiSa
8921720
I don't want to remove savedPersons all values. I want to delete a specific value. this codes is delete all records in savedPersons.
– Hasan Rıza Uzuner
Dec 31 '18 at 12:10
@HasanRızaUzuner sorry. I didn't understand correctly. I changed my code
– SiSa
Dec 31 '18 at 12:22
AsyncStorage.getItemis async, the rest of the code needs to go into its callback.
– Chris G
Dec 31 '18 at 12:58
add a comment |
-1
try this
var savedPersons = JSON.parse(await AsyncStorage.getItem('savedPersons'));
let i = savedPersons.indexOf("Uzuner");
if(i > -1) {
savedPersons.splice(i, 1);
AsyncStorage.setItem('savedPersons', savedPersons);
}
answered Dec 31 '18 at 11:43
SiSaSiSa
8921720
I don't want to remove savedPersons all values. I want to delete a specific value. this codes is delete all records in savedPersons.
– Hasan Rıza Uzuner
Dec 31 '18 at 12:10
@HasanRızaUzuner sorry. I didn't understand correctly. I changed my code
– SiSa
Dec 31 '18 at 12:22
AsyncStorage.getItemis async, the rest of the code needs to go into its callback.
– Chris G
Dec 31 '18 at 12:58
add a comment |
-1
-1
-1
try this
var savedPersons = JSON.parse(await AsyncStorage.getItem('savedPersons'));
let i = savedPersons.indexOf("Uzuner");
if(i > -1) {
savedPersons.splice(i, 1);
AsyncStorage.setItem('savedPersons', savedPersons);
}
answered Dec 31 '18 at 11:43
SiSaSiSa
8921720
try this
var savedPersons = JSON.parse(await AsyncStorage.getItem('savedPersons'));
let i = savedPersons.indexOf("Uzuner");
if(i > -1) {
savedPersons.splice(i, 1);
AsyncStorage.setItem('savedPersons', savedPersons);
}
answered Dec 31 '18 at 11:43
SiSaSiSa
8921720
edited Dec 31 '18 at 13:36
answered Dec 31 '18 at 11:43
SiSaSiSa
8921720
answered Dec 31 '18 at 11:43
SiSaSiSa
8921720
answered Dec 31 '18 at 11:43
SiSaSiSa
8921720
8921720
I don't want to remove savedPersons all values. I want to delete a specific value. this codes is delete all records in savedPersons.
– Hasan Rıza Uzuner
Dec 31 '18 at 12:10
@HasanRızaUzuner sorry. I didn't understand correctly. I changed my code
– SiSa
Dec 31 '18 at 12:22
AsyncStorage.getItemis async, the rest of the code needs to go into its callback.
– Chris G
Dec 31 '18 at 12:58
add a comment |
I don't want to remove savedPersons all values. I want to delete a specific value. this codes is delete all records in savedPersons.
– Hasan Rıza Uzuner
Dec 31 '18 at 12:10
@HasanRızaUzuner sorry. I didn't understand correctly. I changed my code
– SiSa
Dec 31 '18 at 12:22
AsyncStorage.getItemis async, the rest of the code needs to go into its callback.
– Chris G
Dec 31 '18 at 12:58
I don't want to remove savedPersons all values. I want to delete a specific value. this codes is delete all records in savedPersons.
– Hasan Rıza Uzuner
Dec 31 '18 at 12:10
I don't want to remove savedPersons all values. I want to delete a specific value. this codes is delete all records in savedPersons.
– Hasan Rıza Uzuner
Dec 31 '18 at 12:10
@HasanRızaUzuner sorry. I didn't understand correctly. I changed my code
– SiSa
Dec 31 '18 at 12:22
@HasanRızaUzuner sorry. I didn't understand correctly. I changed my code
– SiSa
Dec 31 '18 at 12:22
AsyncStorage.getItem is async, the rest of the code needs to go into its callback.– Chris G
Dec 31 '18 at 12:58
AsyncStorage.getItem is async, the rest of the code needs to go into its callback.– Chris G
Dec 31 '18 at 12:58
add a comment |
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1. load the string from storage and parse it into array 2. remove person from array 3. save stringified array to storage
– Chris G
Dec 31 '18 at 11:16
thank you. I will try this. Do you have any example code?
– Hasan Rıza Uzuner
Dec 31 '18 at 12:11