+

1.00

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Description

Description:

Add two numbers, concatenate two arrays or two strings, or duplicate an array. For arrays also see pushBack and append.

⚠

Making copy with ARRAY + [] and + ARRAY are not the same thing. +ARRAY clones every element, so if the array is multi-dimensional, the created copy contains no references. ARRAY + [] creates copy of the 1st dimension, but preserves references in other dimensions. Observe:

arr1 = [1,2,3]; arr2 = [arr1,1,2,3]; arr3 = arr2 + []; arr3 select 0 set [0, "oops"]; hint str arr1; // ["oops",2,3] vs.

arr1 = [1,2,3]; arr2 = [arr1,1,2,3]; arr3 = +arr2; arr3 select 0 set [0, "oops"]; hint str arr1; // [1,2,3]

Groups:

Uncategorised

Syntax 1

Syntax:

numberA + numberB

Parameters:

numberA: Number

numberB: Number

Return Value:

Number - the sum of numberA and numberB

Syntax 2

Syntax:

+ numberA

Parameters:

numberA: Number

Return Value:

Number - returns numberA

Syntax 3

Syntax:

arrayA + arrayB

Parameters:

arrayA: Array

arrayB: Array

Return Value:

Array - a new array filled with arrayA and arrayB elements, in that order.

Syntax 4

Syntax:

stringA + stringB

Parameters:

stringA: String

stringB: String

Return Value:

String - a string concatenating stringA and stringB

Syntax 5

Syntax:

+ arrayA

Parameters:

arrayA: Array

Return Value:

Array - a new instance of array filled with same items.

Examples

Example 1:

5 + 3; // returns 8 -5 + -3; // returns -8

Example 2:

+ 2; // returns 2 + -7; // returns -7

Example 3:

_arrayA = [1,2,3]; _arrayB = [3,4,5]; _arrayAB = _arrayA + _arrayB; // _arrayAB = [1,2,3,3,4,5] // _arrayA and _arrayB remain unchanged

Example 4:

_result = "Hello" + " " + "there"; // "Hello there"

Example 5:

_arrayA = [1,2,3]; _arrayB = +_arrayA; _arrayB set [0, 99]; // _arrayA = [1,2,3], _arrayB = [99,2,3]

Additional Information

See also:

OperatorspushBackappend

Notes

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