W1

Question 1

SyntaxError

Answer 1

Incorrect grammar in the structuring of the ruby code

Ex: my_array =

Need to have a value assign to it

Question 2

NameError

Answer 2

A variable or method name that has not been defined

Ex: my_name = yangel
P name
Name was not previously defined

Question 3

NoMethodError

Answer 3

Refers to a undefined method. It is
Considers a SPECIAL instance of a NameError

Ex:
def say_hello(name)
P “hi” + name
end

hello(“world”)

Because “hello” is not defined method

Question 4

ArgumentError

Answer 4

Results of typically passing too little or too many arguments

Ex:
def say_hello(f_name, l_name)
p “hi” + f_name + “ “+ l_name
end

say_hello(“yangel”)
We only gave 1 argument when needing 2

Question 5

TypeError

Answer 5

Result from performing an operation with a incompatible data type

5 + “spaghetti”

Question 6

all?

Answer 6

Returns true when all elements in result in true when passed into the block

Question 7

any?

Answer 7

Returns true when any of the elements results true when passed into the block

Question 8

none?

Answer 8

Returns true when no elements of result in true when passed into the block

Question 9

one?

Answer 9

Return true when exactly one element result in true when passed into the block

Question 10

.count

Answer 10

Return a number representing the count of elements that result in true when passed into the block

Question 11

.sum

Answer 11

Return the total sum of all elements

Question 12

.max and .min

Answer 12

Return the maximum or minimum element

Question 13

.flatten

Answer 13

Return the 1 dimensional version of any Multidimensional array

Question 14

Symbols

Answer 14

Symbol and string are not equivalent. Symbols are immutable.

sym = :hello

Question 15

*

Answer 15

Splat operator accepts additional arguments

The additional argument will be in a array

Best practice to put * at the end of the parameter

** performs similar unpacking of a hash key value pairs ( will only work with hashes where keys are symbol: )

Question 16

str.each_char

Answer 16

Iterate through each character in the string !

Question 17

Bubble sort algorithm

Answer 17

def bubble (arr)
Sorted = false

While !sorted
Sorted = true

 Sorted = false

Question 18

[1,2,3] & [3,4,5]

Answer 18

Combines all like elements with in the arrays

[3]

Question 19

-3.abs

Answer 19

Return 3

Turns a - into a +