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deli-counter's Introduction

Deli Counter - Take a Number

Objectives

Practice building methods that use iteration and controlling their return values.
Practice manipulating arrays (adding elements, removing elements, etc.).

Instructions

The local deli is putting in a new computerized queue to keep track of their customers and improve productivity. At the beginning of the day, the deli is empty so the queue should be represented by an empty array:

katz_deli = []

Write all of your code in deli_counter.rb

Build the line method that shows everyone their current place in the line. If there is nobody in line, it should say "The line is currently empty.".
Build a method that a new customer will use when entering the deli. The take_a_number method should accept two arguments, the array for the current line of people (katz_deli), and a string containing the name of the person joining the end of the line. The method should call out (puts) the person's name along with their position in line. Top-Tip: Remember that people like to count from 1, not from 0 ("zero") like computers.
Build the now_serving method which should call out (i.e. puts) the next person in line and then remove them from the front. If there is nobody in line, it should call out (puts) that "There is nobody waiting to be served!".

Example usage:

katz_deli = []

take_a_number(katz_deli, "Ada") #=> Welcome, Ada. You are number 1 in line.
take_a_number(katz_deli, "Grace") #=> Welcome, Grace. You are number 2 in line.
take_a_number(katz_deli, "Kent") #=> Welcome, Kent. You are number 3 in line.

line(katz_deli) #=> "The line is currently: 1. Ada 2. Grace 3. Kent"

now_serving(katz_deli) #=> "Currently serving Ada."

line(katz_deli) #=> "The line is currently: 1. Grace 2. Kent"

take_a_number(katz_deli, "Matz") #=> Welcome, Matz. You are number 3 in line.

line(katz_deli) #=> "The line is currently: 1. Grace 2. Kent 3. Matz"

now_serving(katz_deli) #=> "Currently serving Grace."

line(katz_deli) #=> "The line is currently: 1. Kent 2. Matz"

Hint: Review adding and removing elements from an array as well as iterating with index numbers. Also, many of the methods to add and remove elements from an array can also be used to add and remove elements to a string. This will help you solve the lab.

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matbalez-zz onyoo ruchiramani dev-learn-co-curriculum paulnicholsen27 morgvanny charneff ioreka aajennoh markygan123 salsa-dude kreig101 rshield1 hoyzington kenkuts simokh shemabryan jchasse madeline-stark mimirandi21 tchartchke ggebre rakitzis45 gmlevenhagen miodice3 smassarsky hiddencilantro mjones1818 karegan4 jessenreynolds jcode319 ar00gula ocawthorne spenser6131 bellaappel bclarke329 turpp nsethblanchard rtblanco fredflor92 madelinemc tdog088 oroko cespino93 hovablack apontigo stevens714 nr598 yahsei vmatteucci98 seanyo89 castanm7 jmacklin1 ethanwolfe10 graylew1999 gundersond anthonyjy72 msalerno93 aespinoza777 rtyenriques izzyuri hectorfly21 marquellboyd22 gabe31 simonemayers dayshajones astralsol angelomilien cissica ahmadshahseerat ikevinzuniga iamrivera mikemt00 jmb521 nathaniel-kerr kingkatraz ayo3able benjaminghray abysmalpsycho litatyhq alondrob galvezn piliposyans heartphone43 codejavi mchamb92 jmsimmons90 ashg858 davidcampbell00 tahhriq nrymarz jratana1 shilcof cassymarie brownjer3 vandelayutd nicklevenson jessijoke andrudog7 jomapormentilla

deli-counter's Issues

Instructions say return, test says puts

The Instructions say return a persons name and position, but the test doesnt' work unless it is printed or put out. Just a little confusion in the syntax of the instruction

Deli Counter: there are people in line , should display the current line , works with different people in line

def line(katz_deli)
in_line = []
if katz_deli.length == 0
puts "The line is currently empty." // passes the first test
else katz_deli.each do |i|
in_line.push("i + 1. #{katz_deli[i]}")
end
puts "The line is currently: #{in_line}."
end
end

Error message Failures:

Deli Counter #line there are people in line should display the current line
Failure/Error: line(other_deli)
TypeError:
no implicit conversion of String into Integer
./deli_counter.rb:6:in `[]'

Trying to figure out how to get everything to print out in one line. Tried to push all items in katz-deli to a new array by using array.each do method. Any ideas/critiques would be appreciated!

Action Items

Instance Variables need to be explained
Example code led them down rabbit whole of using local variables

The instructions for #take_a_number are incomplete.

Hello! The instructions for #take_a_number currently say that the method should accept two arguments: the array for the current line of people and the string with the name of the person who wants to join the line. They also mention that #take_a_number should "puts" the person's name and their position in line.

This is good, but the instructions ALSO need to mention that #take_a_number should add the person to the end of the line. Otherwise, the program won't work as intended, and the tests won't pass.

Thanks for looking into this!
Sdcrouse

update readme

remove front matter, add objectives, remove booxr link

i can't fork this lesson

Help with what I'm doing wrong

#line failed

My method failed, but I think it's correct as is:

def line(katz_deli)
if katz_deli.length == 0
puts "The line is currently empty."
else
print "The line is currently: "
katz_deli.each_with_index do |name, index|
print "#{index+1}. #{name} "
end
puts
end
end

Remove Solution Branch

Considering that we deploy this to potential applicants, I think we should remove the solution branch from this lab.

Feedback <<

Would be nice to know you can use << on strings!

Submitted a suggested edit for the Deli Counter Lab instructions

I just submitted a suggested edit to the Deli Counter Lab instructions (in the "README.md" file). This is my first time to submit a suggested change to text in a lesson, so I wanted to be sure I've followed appropriate procedures: I simply clicked the "Edit Lesson' button at the top of the page, made the changes, and clicked submit. I presume this may have resulted in a pull request being automatically issued in the background?

My edit was basically to add missing instructions regarding what should be returned by the #take_a_number method and the #now_serving method.

Thanks!!

Pull Request Issue

After passing the lab I tried to submit pull request, but it didn't work. I tried refreshing my page, and even closed the IDE completely and tried submitting pull request again, but nothing.

difference in task example and spec expectation

Hi! The example provided in the task itself says method "take_a_number" should return the following:
take_a_number(katz_deli, "Matz") #=> 3
However, spec expects the following: "expect($stdout).to receive(:puts).with("Welcome, Ada. You are number 1 in line.")"
Probably, the task's example should be corrected.