Symbol review

Question 1

\

Answer 1

Escape backslash

Question 2

'

Answer 2

Escape single-quote (‘)

Question 3

"

Answer 3

Escape double-quote (“)

Question 4

\a

Answer 4

Escape bell

Question 5

\b

Answer 5

Escape backspace

Question 6

\f

Answer 6

Escape formfeed

Question 7

\n

Answer 7

Escape newline

Question 8

\r

Answer 8

Escape carriage

Question 9

\t

Answer 9

Escape Tab (TAB)

Question 10

\v

Answer 10

Escape vertical tab

Question 11

BEGIN

Answer 11

Run this block when the script starts.

Question 12

END

Answer 12

Run this block when the script is done.

Question 13

alias

Answer 13

Create another name for a function.

Question 14

and

Answer 14

Logical and, but lower priority than &&.

Question 15

begin

Answer 15

Start a block, usually for exceptions.

Question 16

break

Answer 16

Break out of a loop.

Question 17

case

Answer 17

Case style conditional, like an if.

Question 18

class

Answer 18

Define a new class.

Question 19

def

Answer 19

Define a new function.

Question 20

defined?

Answer 20

Is this class/function/etc. defined already?

Question 21

do

Answer 21

Create a block that maybe takes a parameter.

Question 22

else

Answer 22

Else conditional.

Question 23

elsif

Answer 23

Else if conditional

Question 24

end

Answer 24

Ends blocks, functions, classes, etc.

Question 25

ensure

Answer 25

Run this code whether an exception happens or not.

Question 26

for

Answer 26

For loop syntax. *The .each syntax is preferred.

Question 27

if

Answer 27

If conditional.

Question 28

in

Answer 28

In part of for-loops.

Question 29

module

Answer 29

Define a new module.

Question 30

next

Answer 30

Skip to the next element of a .each iterator.

Question 31

not

Answer 31

Logical not. *use ! instead.

Question 32

or

Answer 32

Logical or.

Question 33

redo

Answer 33

Rerun a code block exactly the same.

Question 34

rescue

Answer 34

Run this code if an exception happens.

Question 35

retry

Answer 35

In a rescue clause, says to try the block again.

Question 36

return

Answer 36

Returns a value from a function. *Mostly optional.

Question 37

self

Answer 37

The current object, class, or module.

Question 38

super

Answer 38

The parent class of this class.

Question 39

then

Answer 39

Can be used with if optionally.

Question 40

undef

Answer 40

Remove a function definition from a class.

Question 41

unless

Answer 41

Inverse of if.

Question 42

until

Answer 42

Inverse of while, execute block as long as false.

Question 43

when

Answer 43

Part of case conditionals.

Question 44

while

Answer 44

While loop.

Question 45

yield

Answer 45

Pause and transfer control to the code block.

Question 46

true

Answer 46

True boolean value.

Question 47

false

Answer 47

False boolean value.

Question 48

nil

Answer 48

Represents “nothing” or “no value”.

Question 49

strings

Answer 49

Stores textual information.

Question 50

numbers

Answer 50

Stores integers.

Question 51

floats

Answer 51

Stores decimals.

Question 52

arrays

Answer 52

Stores a list of things.

Question 53

hashes

Answer 53

Stores a key=value mapping of things.

Question 54

+

Answer 54

Add

Question 55

-

Answer 55

Subtract

Question 56

*

Answer 56

Multiply

Question 57

**

Answer 57

Power of

Question 58

/

Answer 58

Divide

Question 59

%

Answer 59

Modulus

Question 60

>

Answer 60

Greater then

Question 61

.

Answer 61

Dot access

Question 62

::

Answer 62

colon access

Question 63

[ ]

Answer 63

List brackets

Question 64

!

Answer 64

Not

Question 65

<

Answer 65

Less then

Question 66

> =

Answer 66

Greater then equal

Question 67

<=

Answer 67

Less then equal

Question 68

==

Answer 68

Comparison

Question 69

===

Answer 69

Equality

Question 70

!=

Answer 70

Not equal

Question 71

&&

Answer 71

Logical and (higher precedence)

Question 72

||

Answer 72

Logical or (higher precedence)

Question 73

..

Answer 73

Range inclusive

Question 74

…

Answer 74

Range non-inclusive

Question 75

@

Answer 75

Object scope

Question 76

@@

Answer 76

Class scope

Question 77

$

Answer 77

Global scope

Question 78

What does a||b do?

Answer 78

Check if a is either false or nill, if it is return b. Otherwise return a

Question 79

What will this return if count is nill?

count ||= 37

Answer 79

count = 37

Question 80

What will this return if count is 21?

count ||= 37

Answer 80

count = 21