Parse keypath to array item from string
-1
How can I parse a string like this ""0.children.13.children.0" to the path to the array item in JavaScript?
Example: "0.children.13.children.0" > arr[0].children[13].children[0]
Thanks in advance!
javascript arrays parsing
edited Nov 19 '18 at 9:40
Ashish Kamble
632519
asked Nov 19 '18 at 6:54
Danny WhiteDanny White
11
add a comment |
-1
How can I parse a string like this ""0.children.13.children.0" to the path to the array item in JavaScript?
Example: "0.children.13.children.0" > arr[0].children[13].children[0]
Thanks in advance!
javascript arrays parsing
edited Nov 19 '18 at 9:40
Ashish Kamble
632519
asked Nov 19 '18 at 6:54
Danny WhiteDanny White
11
Which language are you using?
– Ankit Agarwal
Nov 19 '18 at 6:54
I use Javascript
– Danny White
Nov 19 '18 at 6:56
why don't you justsplit(".")? Now you have all the keys and you can resolve the valuevar value = path.split(".").reduce((obj,key) => obj[key], arr);
– Thomas
Nov 19 '18 at 7:25
Thank you! Using split function is very useful in this case
– Danny White
Nov 19 '18 at 11:09
add a comment |
-1
-1
-1
How can I parse a string like this ""0.children.13.children.0" to the path to the array item in JavaScript?
Example: "0.children.13.children.0" > arr[0].children[13].children[0]
Thanks in advance!
javascript arrays parsing
edited Nov 19 '18 at 9:40
Ashish Kamble
632519
asked Nov 19 '18 at 6:54
Danny WhiteDanny White
11
How can I parse a string like this ""0.children.13.children.0" to the path to the array item in JavaScript?
Example: "0.children.13.children.0" > arr[0].children[13].children[0]
Thanks in advance!
javascript arrays parsing
javascript arrays parsing
edited Nov 19 '18 at 9:40
Ashish Kamble
632519
asked Nov 19 '18 at 6:54
Danny WhiteDanny White
11
edited Nov 19 '18 at 9:40
Ashish Kamble
632519
asked Nov 19 '18 at 6:54
Danny WhiteDanny White
11
edited Nov 19 '18 at 9:40
Ashish Kamble
632519
edited Nov 19 '18 at 9:40
Ashish Kamble
632519
edited Nov 19 '18 at 9:40
Ashish Kamble
632519
632519
asked Nov 19 '18 at 6:54
Danny WhiteDanny White
11
asked Nov 19 '18 at 6:54
Danny WhiteDanny White
11
asked Nov 19 '18 at 6:54
Danny WhiteDanny White
11
11
Which language are you using?
– Ankit Agarwal
Nov 19 '18 at 6:54
I use Javascript
– Danny White
Nov 19 '18 at 6:56
why don't you justsplit(".")? Now you have all the keys and you can resolve the valuevar value = path.split(".").reduce((obj,key) => obj[key], arr);
– Thomas
Nov 19 '18 at 7:25
Thank you! Using split function is very useful in this case
– Danny White
Nov 19 '18 at 11:09
add a comment |
Which language are you using?
– Ankit Agarwal
Nov 19 '18 at 6:54
I use Javascript
– Danny White
Nov 19 '18 at 6:56
why don't you justsplit(".")? Now you have all the keys and you can resolve the valuevar value = path.split(".").reduce((obj,key) => obj[key], arr);
– Thomas
Nov 19 '18 at 7:25
Thank you! Using split function is very useful in this case
– Danny White
Nov 19 '18 at 11:09
Which language are you using?
– Ankit Agarwal
Nov 19 '18 at 6:54
Which language are you using?
– Ankit Agarwal
Nov 19 '18 at 6:54
I use Javascript
– Danny White
Nov 19 '18 at 6:56
I use Javascript
– Danny White
Nov 19 '18 at 6:56
why don't you just
split(".")? Now you have all the keys and you can resolve the value var value = path.split(".").reduce((obj,key) => obj[key], arr);– Thomas
Nov 19 '18 at 7:25
why don't you just
split(".")? Now you have all the keys and you can resolve the value var value = path.split(".").reduce((obj,key) => obj[key], arr);– Thomas
Nov 19 '18 at 7:25
Thank you! Using split function is very useful in this case
– Danny White
Nov 19 '18 at 11:09
Thank you! Using split function is very useful in this case
– Danny White
Nov 19 '18 at 11:09
add a comment |
1 Answer
1
active
oldest
votes
0
Using one string and split it on . could break if your objects have dots in their keys like {'first.name':'John'} so it would probably better to provide an array with strings/ints instead.
Here is an implementation of lodash get with the difference that it only takes path as string:
var data = [
{
children: [
{
children: [{ name: 'got it' }],
},
],
},
null,
];
const get = (object, path = '', defaultValue) => {
const recur = (object, path, defaultValue) => {
if (typeof object !== 'object') {
return defaultValue;
}
if (path.length === 0) {
return object;
}
if (object !== null && path[0] in object) {
return recur(
object[path[0]],
path.slice(1),
defaultValue,
);
}
return defaultValue;
};
return recur(object, path.split('.'), defaultValue);
};
console.log(get(undefined, '', 'Hello World'));//defaults to hello world
console.log(get(data, 'does.not.exist', 'Hello World'));//defaults to hello world
console.log(get(data, '1', 'Hello World'));//will be null (data[0] is null)
console.log(get(data, '1.anything', 'Hello World'));//defaults to hello world
console.log(//gets item data[0].children[0].children[0]
get(data, '0.children.0.children.0', 'Hello World'),
);answered Nov 19 '18 at 8:22
HMRHMR
13.7k113898
Thanks very much! It helped me!
– Danny White
Nov 19 '18 at 11:08
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
Using one string and split it on . could break if your objects have dots in their keys like {'first.name':'John'} so it would probably better to provide an array with strings/ints instead.
Here is an implementation of lodash get with the difference that it only takes path as string:
var data = [
{
children: [
{
children: [{ name: 'got it' }],
},
],
},
null,
];
const get = (object, path = '', defaultValue) => {
const recur = (object, path, defaultValue) => {
if (typeof object !== 'object') {
return defaultValue;
}
if (path.length === 0) {
return object;
}
if (object !== null && path[0] in object) {
return recur(
object[path[0]],
path.slice(1),
defaultValue,
);
}
return defaultValue;
};
return recur(object, path.split('.'), defaultValue);
};
console.log(get(undefined, '', 'Hello World'));//defaults to hello world
console.log(get(data, 'does.not.exist', 'Hello World'));//defaults to hello world
console.log(get(data, '1', 'Hello World'));//will be null (data[0] is null)
console.log(get(data, '1.anything', 'Hello World'));//defaults to hello world
console.log(//gets item data[0].children[0].children[0]
get(data, '0.children.0.children.0', 'Hello World'),
);answered Nov 19 '18 at 8:22
HMRHMR
13.7k113898
Thanks very much! It helped me!
– Danny White
Nov 19 '18 at 11:08
add a comment |
0
Using one string and split it on . could break if your objects have dots in their keys like {'first.name':'John'} so it would probably better to provide an array with strings/ints instead.
Here is an implementation of lodash get with the difference that it only takes path as string:
var data = [
{
children: [
{
children: [{ name: 'got it' }],
},
],
},
null,
];
const get = (object, path = '', defaultValue) => {
const recur = (object, path, defaultValue) => {
if (typeof object !== 'object') {
return defaultValue;
}
if (path.length === 0) {
return object;
}
if (object !== null && path[0] in object) {
return recur(
object[path[0]],
path.slice(1),
defaultValue,
);
}
return defaultValue;
};
return recur(object, path.split('.'), defaultValue);
};
console.log(get(undefined, '', 'Hello World'));//defaults to hello world
console.log(get(data, 'does.not.exist', 'Hello World'));//defaults to hello world
console.log(get(data, '1', 'Hello World'));//will be null (data[0] is null)
console.log(get(data, '1.anything', 'Hello World'));//defaults to hello world
console.log(//gets item data[0].children[0].children[0]
get(data, '0.children.0.children.0', 'Hello World'),
);answered Nov 19 '18 at 8:22
HMRHMR
13.7k113898
Thanks very much! It helped me!
– Danny White
Nov 19 '18 at 11:08
add a comment |
0
0
0
Using one string and split it on . could break if your objects have dots in their keys like {'first.name':'John'} so it would probably better to provide an array with strings/ints instead.
Here is an implementation of lodash get with the difference that it only takes path as string:
var data = [
{
children: [
{
children: [{ name: 'got it' }],
},
],
},
null,
];
const get = (object, path = '', defaultValue) => {
const recur = (object, path, defaultValue) => {
if (typeof object !== 'object') {
return defaultValue;
}
if (path.length === 0) {
return object;
}
if (object !== null && path[0] in object) {
return recur(
object[path[0]],
path.slice(1),
defaultValue,
);
}
return defaultValue;
};
return recur(object, path.split('.'), defaultValue);
};
console.log(get(undefined, '', 'Hello World'));//defaults to hello world
console.log(get(data, 'does.not.exist', 'Hello World'));//defaults to hello world
console.log(get(data, '1', 'Hello World'));//will be null (data[0] is null)
console.log(get(data, '1.anything', 'Hello World'));//defaults to hello world
console.log(//gets item data[0].children[0].children[0]
get(data, '0.children.0.children.0', 'Hello World'),
);answered Nov 19 '18 at 8:22
HMRHMR
13.7k113898
Using one string and split it on . could break if your objects have dots in their keys like {'first.name':'John'} so it would probably better to provide an array with strings/ints instead.
Here is an implementation of lodash get with the difference that it only takes path as string:
var data = [
{
children: [
{
children: [{ name: 'got it' }],
},
],
},
null,
];
const get = (object, path = '', defaultValue) => {
const recur = (object, path, defaultValue) => {
if (typeof object !== 'object') {
return defaultValue;
}
if (path.length === 0) {
return object;
}
if (object !== null && path[0] in object) {
return recur(
object[path[0]],
path.slice(1),
defaultValue,
);
}
return defaultValue;
};
return recur(object, path.split('.'), defaultValue);
};
console.log(get(undefined, '', 'Hello World'));//defaults to hello world
console.log(get(data, 'does.not.exist', 'Hello World'));//defaults to hello world
console.log(get(data, '1', 'Hello World'));//will be null (data[0] is null)
console.log(get(data, '1.anything', 'Hello World'));//defaults to hello world
console.log(//gets item data[0].children[0].children[0]
get(data, '0.children.0.children.0', 'Hello World'),
);var data = [
{
children: [
{
children: [{ name: 'got it' }],
},
],
},
null,
];
const get = (object, path = '', defaultValue) => {
const recur = (object, path, defaultValue) => {
if (typeof object !== 'object') {
return defaultValue;
}
if (path.length === 0) {
return object;
}
if (object !== null && path[0] in object) {
return recur(
object[path[0]],
path.slice(1),
defaultValue,
);
}
return defaultValue;
};
return recur(object, path.split('.'), defaultValue);
};
console.log(get(undefined, '', 'Hello World'));//defaults to hello world
console.log(get(data, 'does.not.exist', 'Hello World'));//defaults to hello world
console.log(get(data, '1', 'Hello World'));//will be null (data[0] is null)
console.log(get(data, '1.anything', 'Hello World'));//defaults to hello world
console.log(//gets item data[0].children[0].children[0]
get(data, '0.children.0.children.0', 'Hello World'),
);var data = [
{
children: [
{
children: [{ name: 'got it' }],
},
],
},
null,
];
const get = (object, path = '', defaultValue) => {
const recur = (object, path, defaultValue) => {
if (typeof object !== 'object') {
return defaultValue;
}
if (path.length === 0) {
return object;
}
if (object !== null && path[0] in object) {
return recur(
object[path[0]],
path.slice(1),
defaultValue,
);
}
return defaultValue;
};
return recur(object, path.split('.'), defaultValue);
};
console.log(get(undefined, '', 'Hello World'));//defaults to hello world
console.log(get(data, 'does.not.exist', 'Hello World'));//defaults to hello world
console.log(get(data, '1', 'Hello World'));//will be null (data[0] is null)
console.log(get(data, '1.anything', 'Hello World'));//defaults to hello world
console.log(//gets item data[0].children[0].children[0]
get(data, '0.children.0.children.0', 'Hello World'),
);answered Nov 19 '18 at 8:22
HMRHMR
13.7k113898
answered Nov 19 '18 at 8:22
HMRHMR
13.7k113898
answered Nov 19 '18 at 8:22
HMRHMR
13.7k113898
answered Nov 19 '18 at 8:22
HMRHMR
13.7k113898
13.7k113898
Thanks very much! It helped me!
– Danny White
Nov 19 '18 at 11:08
add a comment |
Thanks very much! It helped me!
– Danny White
Nov 19 '18 at 11:08
Thanks very much! It helped me!
– Danny White
Nov 19 '18 at 11:08
Thanks very much! It helped me!
– Danny White
Nov 19 '18 at 11:08
add a comment |
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Which language are you using?
– Ankit Agarwal
Nov 19 '18 at 6:54
I use Javascript
– Danny White
Nov 19 '18 at 6:56
why don't you just
split(".")? Now you have all the keys and you can resolve the valuevar value = path.split(".").reduce((obj,key) => obj[key], arr);– Thomas
Nov 19 '18 at 7:25
Thank you! Using split function is very useful in this case
– Danny White
Nov 19 '18 at 11:09