swift-Self-Test questions

Array

1. Define a floating-point array in three different ways

What is the role of 2.+= in arrays

3. Array subscript method to annotate the use of single, multiple elements

4. Change of the log group and delete

5. Traversal of the array (for: In and enumerate)

6. Definition of an empty array

7. Create a specific size, each value is the default array of type double, and if you omit the double explicitly defined, how to write.

8. Combination of two arrays

9. Common methods in arrays

Answer

Dictionary
1. Dictionary definition, create a dictionary with a key value of Int,value value for string

2. Dictionary size with what attributes can be obtained

3. How the dictionary adds elements and how they differ (2 types)

4. How the dictionary deletes elements and how they differ (2 types)

5. How to traverse a dictionary

6. Separate access to the key, value in the dictionary

7. Use keys or values in the dictionary to construct an array

8. How to create an empty dictionary and how to empty a non-empty dictionary

Answer


Control Statements
1.for looping through arrays, dictionaries, strings, ranges

2.while cyclic use

3.do.. While loop

4. Conditional statements if (not stated) and switch (new feature of Switch 2)

5.switch A case can contain multiple case, how to write code.

6.case How to include scopes, tuples

7. What does the value binding on the switch represent.

What is the role of adding where in 8.switch

9. Control transfer Statements in addition to our well-known continue, break, and return add one, what is. Have any effect. How to use it.

10. As mentioned earlier, switch does not need a break, if you add a break is what role

11. How to attach a label to the while, switch, for, if

Answer