FormGroup FormArray - remove only one element object by value

Source: https://stackoverflow.com/questions/46707026/typescript-formgroup-formarray-remove-only-one-element-object-by-value-angul

FormArray class has removeAt which takes the index. If you do not know the index, you can do a workaround:
this.images.removeAt(this.images.value.findIndex(image => image.id === 502))
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