Updating property values dynamically is replacing the entire object
0
I'm trying to update a dataStore service I'm building and I'm hung up on the strangest problem.
public setOptions(params: Params): void {
console.log(this._dataStore.options); // always empty here!!!
for (const key of Object.keys(params)) {
this._dataStore['options'][key] = params[key];
}
console.log(this._dataStore.options); // parameter(s) added
}
Calling setOptions() with the initial set of URL parameters works and _dataStore.options contain the properties reflecting the incoming parameters.
The problem is anytime I call setOptions the options properties are replaced by the new params instead of updating them or adding new additions.
console.log(this._dataStore.options); // city: la
This makes no sense to me, can someone help me understand and how to properly update the .options object?
typescript object parameters
asked Nov 22 '18 at 23:00
TR3BTR3B
1,72322759
|
show 1 more comment
0
I'm trying to update a dataStore service I'm building and I'm hung up on the strangest problem.
public setOptions(params: Params): void {
console.log(this._dataStore.options); // always empty here!!!
for (const key of Object.keys(params)) {
this._dataStore['options'][key] = params[key];
}
console.log(this._dataStore.options); // parameter(s) added
}
Calling setOptions() with the initial set of URL parameters works and _dataStore.options contain the properties reflecting the incoming parameters.
The problem is anytime I call setOptions the options properties are replaced by the new params instead of updating them or adding new additions.
console.log(this._dataStore.options); // city: la
This makes no sense to me, can someone help me understand and how to properly update the .options object?
typescript object parameters
asked Nov 22 '18 at 23:00
TR3BTR3B
1,72322759
I'm not sure what you expect to happen. Can you explain further with some examples of_dataStore.optionsboth before and after callingsetOptions()multiple times?
– Phil
Nov 22 '18 at 23:05
Are you trying to merge them with existing perhaps? Issue is not clear at all
– charlietfl
Nov 22 '18 at 23:08
Yes I am trying to merge them. I explain in the codeproperties are being replaced, not updated or added
– TR3B
Nov 22 '18 at 23:10
Can you please show examples of what you expect to happen given specificparams
– Phil
Nov 22 '18 at 23:11
There is absolutely nothing in the code shown that would remove theclaimedandlocationproperties from_dataStore.options
– Phil
Nov 22 '18 at 23:13
|
show 1 more comment
0
0
0
I'm trying to update a dataStore service I'm building and I'm hung up on the strangest problem.
public setOptions(params: Params): void {
console.log(this._dataStore.options); // always empty here!!!
for (const key of Object.keys(params)) {
this._dataStore['options'][key] = params[key];
}
console.log(this._dataStore.options); // parameter(s) added
}
Calling setOptions() with the initial set of URL parameters works and _dataStore.options contain the properties reflecting the incoming parameters.
The problem is anytime I call setOptions the options properties are replaced by the new params instead of updating them or adding new additions.
console.log(this._dataStore.options); // city: la
This makes no sense to me, can someone help me understand and how to properly update the .options object?
typescript object parameters
asked Nov 22 '18 at 23:00
TR3BTR3B
1,72322759
I'm trying to update a dataStore service I'm building and I'm hung up on the strangest problem.
public setOptions(params: Params): void {
console.log(this._dataStore.options); // always empty here!!!
for (const key of Object.keys(params)) {
this._dataStore['options'][key] = params[key];
}
console.log(this._dataStore.options); // parameter(s) added
}
Calling setOptions() with the initial set of URL parameters works and _dataStore.options contain the properties reflecting the incoming parameters.
The problem is anytime I call setOptions the options properties are replaced by the new params instead of updating them or adding new additions.
console.log(this._dataStore.options); // city: la
This makes no sense to me, can someone help me understand and how to properly update the .options object?
typescript object parameters
typescript object parameters
asked Nov 22 '18 at 23:00
TR3BTR3B
1,72322759
asked Nov 22 '18 at 23:00
TR3BTR3B
1,72322759
edited Nov 23 '18 at 15:05
TR3B
asked Nov 22 '18 at 23:00
TR3BTR3B
1,72322759
asked Nov 22 '18 at 23:00
TR3BTR3B
1,72322759
asked Nov 22 '18 at 23:00
TR3BTR3B
1,72322759
1,72322759
I'm not sure what you expect to happen. Can you explain further with some examples of_dataStore.optionsboth before and after callingsetOptions()multiple times?
– Phil
Nov 22 '18 at 23:05
Are you trying to merge them with existing perhaps? Issue is not clear at all
– charlietfl
Nov 22 '18 at 23:08
Yes I am trying to merge them. I explain in the codeproperties are being replaced, not updated or added
– TR3B
Nov 22 '18 at 23:10
Can you please show examples of what you expect to happen given specificparams
– Phil
Nov 22 '18 at 23:11
There is absolutely nothing in the code shown that would remove theclaimedandlocationproperties from_dataStore.options
– Phil
Nov 22 '18 at 23:13
|
show 1 more comment
I'm not sure what you expect to happen. Can you explain further with some examples of_dataStore.optionsboth before and after callingsetOptions()multiple times?
– Phil
Nov 22 '18 at 23:05
Are you trying to merge them with existing perhaps? Issue is not clear at all
– charlietfl
Nov 22 '18 at 23:08
Yes I am trying to merge them. I explain in the codeproperties are being replaced, not updated or added
– TR3B
Nov 22 '18 at 23:10
Can you please show examples of what you expect to happen given specificparams
– Phil
Nov 22 '18 at 23:11
There is absolutely nothing in the code shown that would remove theclaimedandlocationproperties from_dataStore.options
– Phil
Nov 22 '18 at 23:13
I'm not sure what you expect to happen. Can you explain further with some examples of
_dataStore.options both before and after calling setOptions() multiple times?– Phil
Nov 22 '18 at 23:05
I'm not sure what you expect to happen. Can you explain further with some examples of
_dataStore.options both before and after calling setOptions() multiple times?– Phil
Nov 22 '18 at 23:05
Are you trying to merge them with existing perhaps? Issue is not clear at all
– charlietfl
Nov 22 '18 at 23:08
Are you trying to merge them with existing perhaps? Issue is not clear at all
– charlietfl
Nov 22 '18 at 23:08
Yes I am trying to merge them. I explain in the code
properties are being replaced, not updated or added– TR3B
Nov 22 '18 at 23:10
Yes I am trying to merge them. I explain in the code
properties are being replaced, not updated or added– TR3B
Nov 22 '18 at 23:10
Can you please show examples of what you expect to happen given specific
params– Phil
Nov 22 '18 at 23:11
Can you please show examples of what you expect to happen given specific
params– Phil
Nov 22 '18 at 23:11
There is absolutely nothing in the code shown that would remove the
claimed and location properties from _dataStore.options– Phil
Nov 22 '18 at 23:13
There is absolutely nothing in the code shown that would remove the
claimed and location properties from _dataStore.options– Phil
Nov 22 '18 at 23:13
|
show 1 more comment
1 Answer
1
active
oldest
votes
1
Merge them with Object.assign()
for (const key of Object.keys(params)) {
Object.assign(this._dataStore['options'][key] , params[key]);
// or reverse arguments if applicable
}
answered Nov 22 '18 at 23:11
charlietflcharlietfl
139k1387120
Hey Chalietfl this is where I began only I thoughtObject.assignwas meant to combine properties into a new object? Also it's giving me an errorTypeError: Cannot convert undefined or null to object
– TR3B
Nov 22 '18 at 23:19
Target can be a new object or if it is existing one it copies properties and values from source(s)
– charlietfl
Nov 22 '18 at 23:20
If you have that error likely that dataStore doesn't have that key and need to create an object in that instance. If you would just provide some sample data in order to run this it would help. Hard for us to know how either object is constructed
– charlietfl
Nov 22 '18 at 23:22
Hmm dataStore is instantiated like this:private _dataStore = { options: {}, results: };
– TR3B
Nov 22 '18 at 23:23
Ok then it would seem you need to check if keys exist first
– charlietfl
Nov 22 '18 at 23:24
|
show 4 more comments
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
Merge them with Object.assign()
for (const key of Object.keys(params)) {
Object.assign(this._dataStore['options'][key] , params[key]);
// or reverse arguments if applicable
}
answered Nov 22 '18 at 23:11
charlietflcharlietfl
139k1387120
Hey Chalietfl this is where I began only I thoughtObject.assignwas meant to combine properties into a new object? Also it's giving me an errorTypeError: Cannot convert undefined or null to object
– TR3B
Nov 22 '18 at 23:19
Target can be a new object or if it is existing one it copies properties and values from source(s)
– charlietfl
Nov 22 '18 at 23:20
If you have that error likely that dataStore doesn't have that key and need to create an object in that instance. If you would just provide some sample data in order to run this it would help. Hard for us to know how either object is constructed
– charlietfl
Nov 22 '18 at 23:22
Hmm dataStore is instantiated like this:private _dataStore = { options: {}, results: };
– TR3B
Nov 22 '18 at 23:23
Ok then it would seem you need to check if keys exist first
– charlietfl
Nov 22 '18 at 23:24
|
show 4 more comments
1
Merge them with Object.assign()
for (const key of Object.keys(params)) {
Object.assign(this._dataStore['options'][key] , params[key]);
// or reverse arguments if applicable
}
answered Nov 22 '18 at 23:11
charlietflcharlietfl
139k1387120
Hey Chalietfl this is where I began only I thoughtObject.assignwas meant to combine properties into a new object? Also it's giving me an errorTypeError: Cannot convert undefined or null to object
– TR3B
Nov 22 '18 at 23:19
Target can be a new object or if it is existing one it copies properties and values from source(s)
– charlietfl
Nov 22 '18 at 23:20
If you have that error likely that dataStore doesn't have that key and need to create an object in that instance. If you would just provide some sample data in order to run this it would help. Hard for us to know how either object is constructed
– charlietfl
Nov 22 '18 at 23:22
Hmm dataStore is instantiated like this:private _dataStore = { options: {}, results: };
– TR3B
Nov 22 '18 at 23:23
Ok then it would seem you need to check if keys exist first
– charlietfl
Nov 22 '18 at 23:24
|
show 4 more comments
1
1
1
Merge them with Object.assign()
for (const key of Object.keys(params)) {
Object.assign(this._dataStore['options'][key] , params[key]);
// or reverse arguments if applicable
}
answered Nov 22 '18 at 23:11
charlietflcharlietfl
139k1387120
Merge them with Object.assign()
for (const key of Object.keys(params)) {
Object.assign(this._dataStore['options'][key] , params[key]);
// or reverse arguments if applicable
}
answered Nov 22 '18 at 23:11
charlietflcharlietfl
139k1387120
edited Nov 22 '18 at 23:18
answered Nov 22 '18 at 23:11
charlietflcharlietfl
139k1387120
answered Nov 22 '18 at 23:11
charlietflcharlietfl
139k1387120
answered Nov 22 '18 at 23:11
charlietflcharlietfl
139k1387120
139k1387120
Hey Chalietfl this is where I began only I thoughtObject.assignwas meant to combine properties into a new object? Also it's giving me an errorTypeError: Cannot convert undefined or null to object
– TR3B
Nov 22 '18 at 23:19
Target can be a new object or if it is existing one it copies properties and values from source(s)
– charlietfl
Nov 22 '18 at 23:20
If you have that error likely that dataStore doesn't have that key and need to create an object in that instance. If you would just provide some sample data in order to run this it would help. Hard for us to know how either object is constructed
– charlietfl
Nov 22 '18 at 23:22
Hmm dataStore is instantiated like this:private _dataStore = { options: {}, results: };
– TR3B
Nov 22 '18 at 23:23
Ok then it would seem you need to check if keys exist first
– charlietfl
Nov 22 '18 at 23:24
|
show 4 more comments
Hey Chalietfl this is where I began only I thoughtObject.assignwas meant to combine properties into a new object? Also it's giving me an errorTypeError: Cannot convert undefined or null to object
– TR3B
Nov 22 '18 at 23:19
Target can be a new object or if it is existing one it copies properties and values from source(s)
– charlietfl
Nov 22 '18 at 23:20
If you have that error likely that dataStore doesn't have that key and need to create an object in that instance. If you would just provide some sample data in order to run this it would help. Hard for us to know how either object is constructed
– charlietfl
Nov 22 '18 at 23:22
Hmm dataStore is instantiated like this:private _dataStore = { options: {}, results: };
– TR3B
Nov 22 '18 at 23:23
Ok then it would seem you need to check if keys exist first
– charlietfl
Nov 22 '18 at 23:24
Hey Chalietfl this is where I began only I thought
Object.assign was meant to combine properties into a new object? Also it's giving me an error TypeError: Cannot convert undefined or null to object– TR3B
Nov 22 '18 at 23:19
Hey Chalietfl this is where I began only I thought
Object.assign was meant to combine properties into a new object? Also it's giving me an error TypeError: Cannot convert undefined or null to object– TR3B
Nov 22 '18 at 23:19
Target can be a new object or if it is existing one it copies properties and values from source(s)
– charlietfl
Nov 22 '18 at 23:20
Target can be a new object or if it is existing one it copies properties and values from source(s)
– charlietfl
Nov 22 '18 at 23:20
If you have that error likely that dataStore doesn't have that key and need to create an object in that instance. If you would just provide some sample data in order to run this it would help. Hard for us to know how either object is constructed
– charlietfl
Nov 22 '18 at 23:22
If you have that error likely that dataStore doesn't have that key and need to create an object in that instance. If you would just provide some sample data in order to run this it would help. Hard for us to know how either object is constructed
– charlietfl
Nov 22 '18 at 23:22
Hmm dataStore is instantiated like this:
private _dataStore = { options: {}, results: };– TR3B
Nov 22 '18 at 23:23
Hmm dataStore is instantiated like this:
private _dataStore = { options: {}, results: };– TR3B
Nov 22 '18 at 23:23
Ok then it would seem you need to check if keys exist first
– charlietfl
Nov 22 '18 at 23:24
Ok then it would seem you need to check if keys exist first
– charlietfl
Nov 22 '18 at 23:24
|
show 4 more comments
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I'm not sure what you expect to happen. Can you explain further with some examples of
_dataStore.optionsboth before and after callingsetOptions()multiple times?– Phil
Nov 22 '18 at 23:05
Are you trying to merge them with existing perhaps? Issue is not clear at all
– charlietfl
Nov 22 '18 at 23:08
Yes I am trying to merge them. I explain in the code
properties are being replaced, not updated or added– TR3B
Nov 22 '18 at 23:10
Can you please show examples of what you expect to happen given specific
params– Phil
Nov 22 '18 at 23:11
There is absolutely nothing in the code shown that would remove the
claimedandlocationproperties from_dataStore.options– Phil
Nov 22 '18 at 23:13