Interface Array<T>
Type parameters
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T
Hierarchy
- Array
Indexable
Index
Properties
length
Methods
concat
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Combines two or more arrays.
Parameters
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Rest ...items: ConcatArray<T>[]
Additional items to add to the end of array1.
Returns T[]
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Combines two or more arrays.
Parameters
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Rest ...items: (T | ConcatArray<T>)[]
Additional items to add to the end of array1.
Returns T[]
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every
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Determines whether all the members of an array satisfy the specified test.
Parameters
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callbackfn: function
A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
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Parameters
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value: T
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index: number
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array: T[]
Returns boolean
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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 boolean
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filter
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Returns the elements of an array that meet the condition specified in a callback function.
Type parameters
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S: T
Parameters
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callbackfn: function
A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
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Parameters
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value: T
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index: number
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array: T[]
Returns boolean
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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 S[]
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Returns the elements of an array that meet the condition specified in a callback function.
Parameters
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callbackfn: function
A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
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Parameters
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value: T
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index: number
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array: T[]
Returns any
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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 T[]
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forEach
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Performs the specified action for each element in an array.
Parameters
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callbackfn: function
A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
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Parameters
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value: T
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index: number
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array: T[]
Returns void
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-
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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
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indexOf
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Returns the index of the first occurrence of a value in an array.
Parameters
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searchElement: T
The value to locate in the array.
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Optional fromIndex: number
The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
Returns number
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join
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Adds all the elements of an array separated by the specified separator string.
Parameters
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Optional separator: string
A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
Returns string
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lastIndexOf
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Returns the index of the last occurrence of a specified value in an array.
Parameters
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searchElement: T
The value to locate in the array.
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Optional fromIndex: number
The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
Returns number
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map
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Calls a defined callback function on each element of an array, and returns an array that contains the results.
Type parameters
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U
Parameters
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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.
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Parameters
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value: T
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index: number
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array: T[]
Returns U
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-
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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[]
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pop
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Removes the last element from an array and returns it.
Returns T | undefined
push
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Appends new elements to an array, and returns the new length of the array.
Parameters
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Rest ...items: T[]
New elements of the Array.
Returns number
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reduce
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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
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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.
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Parameters
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previousValue: T
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currentValue: T
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currentIndex: number
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array: T[]
Returns T
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Returns T
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Parameters
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callbackfn: function
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Parameters
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previousValue: T
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currentValue: T
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currentIndex: number
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array: T[]
Returns T
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initialValue: T
Returns T
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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
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U
Parameters
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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.
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Parameters
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previousValue: U
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currentValue: T
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currentIndex: number
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array: T[]
Returns U
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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
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reduceRight
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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
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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.
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Parameters
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previousValue: T
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currentValue: T
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currentIndex: number
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array: T[]
Returns T
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Returns T
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Parameters
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callbackfn: function
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Parameters
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previousValue: T
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currentValue: T
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currentIndex: number
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array: T[]
Returns T
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initialValue: T
Returns T
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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
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U
Parameters
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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.
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Parameters
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previousValue: U
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currentValue: T
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currentIndex: number
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array: T[]
Returns U
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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
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reverse
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Reverses the elements in an Array.
Returns T[]
shift
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Removes the first element from an array and returns it.
Returns T | undefined
slice
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Returns a section of an array.
Parameters
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Optional start: number
The beginning of the specified portion of the array.
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Optional end: number
The end of the specified portion of the array.
Returns T[]
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some
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Determines whether the specified callback function returns true for any element of an array.
Parameters
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callbackfn: function
A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
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Parameters
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value: T
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index: number
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array: T[]
Returns boolean
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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 boolean
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sort
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Sorts an array.
Parameters
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Optional compareFn: function
The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.
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Parameters
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a: T
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b: T
Returns number
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Returns this
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splice
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Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
Parameters
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start: number
The zero-based location in the array from which to start removing elements.
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Optional deleteCount: number
The number of elements to remove.
Returns T[]
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Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
Parameters
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start: number
The zero-based location in the array from which to start removing elements.
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deleteCount: number
The number of elements to remove.
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Rest ...items: T[]
Elements to insert into the array in place of the deleted elements.
Returns T[]
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toLocaleString
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Returns a string representation of an array. The elements are converted to string using thier toLocalString methods.
Returns string
toString
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Returns a string representation of an array.
Returns string
unshift
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Inserts new elements at the start of an array.
Parameters
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Rest ...items: T[]
Elements to insert at the start of the Array.
Returns number
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Generated using TypeDoc
Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.