OneOf
Validates if value is matching one of the expectations.
example
Type parameters
▪ T
▪ T
Hierarchy
WrapperPattern
↳ OneOf
Implements
- Pattern
- Pattern
Indexable
- [ n: number]: T
Validates if value is matching one of the expectations.
example
Index
Constructors
Properties
Accessors
Methods
- concat
- describe
- every
- filter
- forEach
- getInitializer
- getKind
- hasInitializer
- indexOf
- join
- lastIndexOf
- map
- onValidation
- pop
- push
- reduce
- reduceRight
- reverse
- setInitializer
- shift
- slice
- some
- sort
- splice
- toLocaleString
- toString
- unshift
- getDescriber
- setDescriber
Constructors
constructor
+ new OneOf(...expectations: any[]): OneOf
Inherited from WrapperPattern.constructor
Overrides void
Parameters:
| Name | Type |
|---|---|
...expectations | any[] |
Returns: OneOf
Properties
length
• length: number
Inherited from Optional.length
Gets or sets the length of the array. This is a number one higher than the highest index in the array.
Static describer
▪ describer: Describer
Inherited from WrapperPattern.describer
Overrides void
Static kind
▪ kind: KINDS = KINDS.ONE_OF
Overrides WrapperPattern.kind
Accessors
isOptional
• get isOptional(): Optional
Inherited from WrapperPattern.isOptional
Overrides void
Returns: Optional
isRequired
• get isRequired(): any
Inherited from WrapperPattern.isRequired
Overrides void
Returns: any
Methods
concat
▸ concat(...items: ConcatArray‹T›[]): T[]
Inherited from Optional.concat
Combines two or more arrays. This method returns a new array without modifying any existing arrays.
Parameters:
| Name | Type | Description |
|---|---|---|
...items | ConcatArray‹T›[] | Additional arrays and/or items to add to the end of the array. |
Returns: T[]
▸ concat(...items: T | ConcatArray‹T›[]): T[]
Inherited from Optional.concat
Combines two or more arrays. This method returns a new array without modifying any existing arrays.
Parameters:
| Name | Type | Description |
|---|---|---|
...items | T | ConcatArray‹T›[] | Additional arrays and/or items to add to the end of the array. |
Returns: T[]
describe
▸ describe(value: any): string
Inherited from WrapperPattern.describe
Overrides void
Parameters:
| Name | Type |
|---|---|
value | any |
Returns: string
every
▸ every‹S›(predicate: function, thisArg?: any): this is S[]
Determines whether all the members of an array satisfy the specified test.
Type parameters:
▪ S: T
Parameters:
▪ predicate: function
A function that accepts up to three arguments. The every method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value false, or until the end of the array.
▸ (value: T, index: number, array: T[]): value is S
Parameters:
| Name | Type |
|---|---|
value | T |
index | number |
array | T[] |
▪Optional thisArg: any
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
Returns: this is S[]
▸ every(predicate: function, thisArg?: any): boolean
Determines whether all the members of an array satisfy the specified test.
Parameters:
▪ predicate: function
A function that accepts up to three arguments. The every method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value false, or until the end of the array.
▸ (value: T, index: number, array: T[]): unknown
Parameters:
| Name | Type |
|---|---|
value | T |
index | number |
array | T[] |
▪Optional thisArg: any
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
Returns: boolean
filter
▸ filter‹S›(predicate: function, thisArg?: any): S[]
Inherited from Optional.filter
Returns the elements of an array that meet the condition specified in a callback function.
Type parameters:
▪ S: T
Parameters:
▪ predicate: function
A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array.
▸ (value: T, index: number, array: T[]): value is S
Parameters:
| Name | Type |
|---|---|
value | T |
index | number |
array | T[] |
▪Optional thisArg: any
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
Returns: S[]
▸ filter(predicate: function, thisArg?: any): T[]
Inherited from Optional.filter
Returns the elements of an array that meet the condition specified in a callback function.
Parameters:
▪ predicate: function
A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array.
▸ (value: T, index: number, array: T[]): unknown
Parameters:
| Name | Type |
|---|---|
value | T |
index | number |
array | T[] |
▪Optional thisArg: any
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
Returns: T[]
forEach
▸ forEach(callbackfn: function, thisArg?: any): void
Inherited from Optional.forEach
Performs the specified action for each element in an array.
Parameters:
▪ callbackfn: function
A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
▸ (value: T, index: number, array: T[]): void
Parameters:
| Name | Type |
|---|---|
value | T |
index | number |
array | T[] |
▪Optional thisArg: any
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
Returns: void
getInitializer
▸ getInitializer(): any | undefined
Implementation of Pattern
Inherited from WrapperPattern.getInitializer
Overrides void
Returns: any | undefined
getKind
▸ getKind(): string
Implementation of Pattern
Inherited from WrapperPattern.getKind
Overrides void
Returns: string
hasInitializer
▸ hasInitializer(): boolean
Implementation of Pattern
Inherited from WrapperPattern.hasInitializer
Overrides void
Returns: boolean
indexOf
▸ indexOf(searchElement: T, fromIndex?: number): number
Inherited from Optional.indexOf
Returns the index of the first occurrence of a value in an array, or -1 if it is not present.
Parameters:
| Name | Type | Description |
|---|---|---|
searchElement | T | The value to locate in the array. |
fromIndex? | number | The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0. |
Returns: number
join
▸ join(separator?: string): string
Adds all the elements of an array into a string, separated by the specified separator string.
Parameters:
| Name | Type | Description |
|---|---|---|
separator? | string | A string used to separate one element of the array from the next in the resulting string. If omitted, the array elements are separated with a comma. |
Returns: string
lastIndexOf
▸ lastIndexOf(searchElement: T, fromIndex?: number): number
Inherited from Optional.lastIndexOf
Overrides Optional.lastIndexOf
Returns the index of the last occurrence of a specified value in an array, or -1 if it is not present.
Parameters:
| Name | Type | Description |
|---|---|---|
searchElement | T | The value to locate in the array. |
fromIndex? | number | The array index at which to begin searching backward. If fromIndex is omitted, the search starts at the last index in the array. |
Returns: number
map
▸ map‹U›(callbackfn: function, thisArg?: any): U[]
Calls a defined callback function on each element of an array, and returns an array that contains the results.
Type parameters:
▪ U
Parameters:
▪ callbackfn: function
A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
▸ (value: T, index: number, array: T[]): U
Parameters:
| Name | Type |
|---|---|
value | T |
index | number |
array | T[] |
▪Optional thisArg: any
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
Returns: U[]
onValidation
▸ onValidation(...expectations: any[]): boolean
Overrides WrapperPattern.onValidation
Ensures that provided expectations can be set on pattern.
throws {InvalidDefinitionError}
Thrown if provided array expectation does not have at least one element defined.
Parameters:
| Name | Type | Description |
|---|---|---|
...expectations | any[] | Expectation that will be used for validation. |
Returns: boolean
pop
▸ pop(): T | undefined
Removes the last element from an array and returns it. If the array is empty, undefined is returned and the array is not modified.
Returns: T | undefined
push
▸ push(...items: T[]): number
Appends new elements to the end of an array, and returns the new length of the array.
Parameters:
| Name | Type | Description |
|---|---|---|
...items | T[] | New elements to add to the array. |
Returns: number
reduce
▸ reduce(callbackfn: function): T
Inherited from Optional.reduce
Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Parameters:
▪ callbackfn: function
A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
▸ (previousValue: T, currentValue: T, currentIndex: number, array: T[]): T
Parameters:
| Name | Type |
|---|---|
previousValue | T |
currentValue | T |
currentIndex | number |
array | T[] |
Returns: T
▸ reduce(callbackfn: function, initialValue: T): T
Inherited from Optional.reduce
Parameters:
▪ callbackfn: function
▸ (previousValue: T, currentValue: T, currentIndex: number, array: T[]): T
Parameters:
| Name | Type |
|---|---|
previousValue | T |
currentValue | T |
currentIndex | number |
array | T[] |
▪ initialValue: T
Returns: T
▸ reduce‹U›(callbackfn: function, initialValue: U): U
Inherited from Optional.reduce
Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Type parameters:
▪ U
Parameters:
▪ callbackfn: function
A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
▸ (previousValue: U, currentValue: T, currentIndex: number, array: T[]): U
Parameters:
| Name | Type |
|---|---|
previousValue | U |
currentValue | T |
currentIndex | number |
array | T[] |
▪ initialValue: U
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
Returns: U
reduceRight
▸ reduceRight(callbackfn: function): T
Inherited from Optional.reduceRight
Overrides Optional.reduceRight
Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Parameters:
▪ callbackfn: function
A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
▸ (previousValue: T, currentValue: T, currentIndex: number, array: T[]): T
Parameters:
| Name | Type |
|---|---|
previousValue | T |
currentValue | T |
currentIndex | number |
array | T[] |
Returns: T
▸ reduceRight(callbackfn: function, initialValue: T): T
Inherited from Optional.reduceRight
Overrides Optional.reduceRight
Parameters:
▪ callbackfn: function
▸ (previousValue: T, currentValue: T, currentIndex: number, array: T[]): T
Parameters:
| Name | Type |
|---|---|
previousValue | T |
currentValue | T |
currentIndex | number |
array | T[] |
▪ initialValue: T
Returns: T
▸ reduceRight‹U›(callbackfn: function, initialValue: U): U
Inherited from Optional.reduceRight
Overrides Optional.reduceRight
Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Type parameters:
▪ U
Parameters:
▪ callbackfn: function
A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
▸ (previousValue: U, currentValue: T, currentIndex: number, array: T[]): U
Parameters:
| Name | Type |
|---|---|
previousValue | U |
currentValue | T |
currentIndex | number |
array | T[] |
▪ initialValue: U
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
Returns: U
reverse
▸ reverse(): T[]
Inherited from Optional.reverse
Reverses the elements in an array in place. This method mutates the array and returns a reference to the same array.
Returns: T[]
setInitializer
▸ setInitializer(initializer: any): void
Implementation of Pattern
Inherited from WrapperPattern.setInitializer
Overrides void
Parameters:
| Name | Type |
|---|---|
initializer | any |
Returns: void
shift
▸ shift(): T | undefined
Removes the first element from an array and returns it. If the array is empty, undefined is returned and the array is not modified.
Returns: T | undefined
slice
▸ slice(start?: number, end?: number): T[]
Returns a copy of a section of an array. For both start and end, a negative index can be used to indicate an offset from the end of the array. For example, -2 refers to the second to last element of the array.
Parameters:
| Name | Type | Description |
|---|---|---|
start? | number | The beginning index of the specified portion of the array. If start is undefined, then the slice begins at index 0. |
end? | number | The end index of the specified portion of the array. This is exclusive of the element at the index 'end'. If end is undefined, then the slice extends to the end of the array. |
Returns: T[]
some
▸ some(predicate: function, thisArg?: any): boolean
Determines whether the specified callback function returns true for any element of an array.
Parameters:
▪ predicate: function
A function that accepts up to three arguments. The some method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value true, or until the end of the array.
▸ (value: T, index: number, array: T[]): unknown
Parameters:
| Name | Type |
|---|---|
value | T |
index | number |
array | T[] |
▪Optional thisArg: any
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.
Returns: boolean
sort
▸ sort(compareFn?: function): this
Sorts an array in place. This method mutates the array and returns a reference to the same array.
Parameters:
▪Optional compareFn: function
Function used to determine the order of the elements. It is expected to return a negative value if the first argument is less than the second argument, zero if they're equal, and a positive value otherwise. If omitted, the elements are sorted in ascending, ASCII character order.
▸ (a: T, b: T): number
Parameters:
| Name | Type |
|---|---|
a | T |
b | T |
Returns: this
splice
▸ splice(start: number, deleteCount?: number): T[]
Inherited from Optional.splice
Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
Parameters:
| Name | Type | Description |
|---|---|---|
start | number | The zero-based location in the array from which to start removing elements. |
deleteCount? | number | The number of elements to remove. |
Returns: T[]
An array containing the elements that were deleted.
▸ splice(start: number, deleteCount: number, ...items: T[]): T[]
Inherited from Optional.splice
Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
Parameters:
| Name | Type | Description |
|---|---|---|
start | number | The zero-based location in the array from which to start removing elements. |
deleteCount | number | The number of elements to remove. |
...items | T[] | Elements to insert into the array in place of the deleted elements. |
Returns: T[]
An array containing the elements that were deleted.
toLocaleString
▸ toLocaleString(): string
Inherited from Optional.toLocaleString
Overrides Optional.toLocaleString
Returns a string representation of an array. The elements are converted to string using their toLocaleString methods.
Returns: string
toString
▸ toString(): string
Inherited from Optional.toString
Returns a string representation of an array.
Returns: string
unshift
▸ unshift(...items: T[]): number
Inherited from Optional.unshift
Inserts new elements at the start of an array, and returns the new length of the array.
Parameters:
| Name | Type | Description |
|---|---|---|
...items | T[] | Elements to insert at the start of the array. |
Returns: number
Static getDescriber
▸ getDescriber(): Describer
Inherited from WrapperPattern.getDescriber
Overrides void
Returns: Describer
Static setDescriber
▸ setDescriber(describer: Describer): void
Inherited from WrapperPattern.setDescriber
Overrides void
Parameters:
| Name | Type |
|---|---|
describer | Describer |
Returns: void