IRB customization in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to require the IRB library.

Ruby

require '[1]'

Drag options to blanks, or click blank then click option'

Ajson

Brails

Cirb

Dnet/http

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'rails' or other unrelated libraries instead of 'irb'.

Forgetting to put the library name in quotes.

The IRB library is required by using require 'irb'.

2fill in blank

medium

Complete the code to start a new IRB session programmatically.

Ruby

IRB.[1]

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Abegin

Bstart

Copen

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods like 'run' or 'open' which do not exist on IRB module.

Calling methods without capitalization.

Use IRB.start to launch a new IRB session from Ruby code.

3fill in blank

hard

Fix the error in the code to customize IRB prompt with a simple string.

Ruby

IRB.conf[:PROMPT_MODE] = :[1]

Drag options to blanks, or click blank then click option'

ASIMPLE

BDEFAULT

CCUSTOM

DBASIC

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or undefined symbols like :simple or :basic.

Using strings instead of symbols.

The symbol :SIMPLE sets a basic prompt style in IRB.

4fill in blank

hard

Fill both blanks to define a custom IRB prompt hash with prompt and return strings.

Ruby

IRB.conf[:PROMPT][:[1]] = {
  PROMPT_I: '[2]',
  RETURN: '=> '
}

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AMY_PROMPT

B>

C>>

DDEFAULT

Attempts:

3 left

💡 Hint

Common Mistakes

Using default prompt names instead of a custom one.

Using wrong prompt strings that don't end with a space.

Define a custom prompt named :MY_PROMPT with input prompt string '>> '.

5fill in blank

hard

Fill all four blanks to set IRB to use your custom prompt and start the session.

Ruby

IRB.conf[:PROMPT_MODE] = :[1]
IRB.conf[:PROMPT][:[1]] = {
  PROMPT_I: '[2]',
  RETURN: '=> '
}
IRB.[3]

Drag options to blanks, or click blank then click option'

AMY_PROMPT

B>>

C=>

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using different symbols for prompt mode and prompt hash.

Forgetting to call IRB.start to launch the session.

Using incorrect prompt strings without spaces.

Set the prompt mode to :MY_PROMPT, define the prompt strings, and start IRB with IRB.start.