Interested to Buy Any Domain ? << Click Here >> for more details...
Consider the following code:
var array1 = [1, 2, 3, 4, 5]
var array2 = array1
array2.append(6)
var len = array1.count
What’s the value of the len variable, and why?
- 1 Answers
- 3843 Views
- I also Faced
- E-Mail Answers
Answer Posted / iosraj
The len variable is equal to 5, meaning that array1 has 5 elements, whereas array2 has 6 elements:
array1 = [1, 2, 3, 4, 5]
array2 = [1, 2, 3, 4, 5, 6]
When array1 is assigned to array2, a copy of array1 is actually created and assigned.
The reason is that swift arrays are value types (implemented as structs) and not reference types (i.e. classes). When a value type is assigned to a variable, passed as argument to a function or method, or otherwise moved around, a copy of it is actually created and assigned or passed. Note that swift dictionaries are also value types, implemented as structs.
Value types in swift are:
structs (incl. arrays and dictionaries)
enumerations
basic data types (boolean, integer, float, etc.)
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Is singleton thread safe swift?
What are the control transfer statements used in swift?
What language is swift written?
Which is better car baleno or swift?
What is set swift?
How many access levels are present in swift?
What is an argument in swift?
What is dynamic keyword in swift?
What is mvvm in swift?
What are the tools that are required to develop ios applications?
Is swift object oriented programming?
Explain swift vs objective-c.
What are the characteristics of switch?
What is the full form of swift code?
Is swift an object-oriented programming language?
