Hands-On Exercises in Go Programming

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Questions and Answers

What is the purpose of using a composite literal in Go?

To define functions with multiple return types.

To import packages into a Go program.

To declare variables without initial values.

To create instances of slices, maps, and structs with specified values. (correct)

Which of the following correctly describes how to attach a method to a struct in Go?

Use the syntax 'func (receiver type) methodName(parameters) returnType'. (correct)

Attach the method using a global keyword.

Methods cannot be attached to structs in Go.

Define the method outside of the struct.

What is required to define an interface type that multiple structs can implement?

At least one method that the structs must define. (correct)

All structs must use the same variable names.

Interfaces cannot be implemented by structs.

Interfaces need to contain only data fields.

What is the purpose of the 'make' function in Go when creating a map?

To initialize a map with a capacity and default values. Signup and view all the answers

Why would you use a for-range loop to iterate over a map in Go?

To get both keys and their associated values simultaneously. Signup and view all the answers

How can you print the value of a map without using the second return value in a for-range loop?

By using only the underscore variable to discard it. Signup and view all the answers

What is required when defining a method for a struct type to be accessible?

The method must be public by using the capital letter convention. Signup and view all the answers

To implement a new interface, what must a type do?

Define all methods specified by the interface. Signup and view all the answers

What was Sotcher's initial reaction to the situation he found himself in?

He protested and begged to be released. Signup and view all the answers

How did Jerry Shand view Sotcher's behavior?

He considered it suspicious. Signup and view all the answers

What method did the group ultimately decide on to deal with Sotcher?

To tie him to an explosive canister. Signup and view all the answers

What kind of atmosphere is conveyed during the encounter with Sotcher?

A tense and threatening environment. Signup and view all the answers

What does Jerry imply about Sotcher's role within the group?

He may be an informant. Signup and view all the answers

What was Sotcher’s self-portrayal when pleading to be let go?

A teacher who should not engage in such actions. Signup and view all the answers

What attitude did Snorkey demonstrate in responding to Jerry's orders?

Obedience and seriousness. Signup and view all the answers

What was the character Curtis reflecting on while descending the stairs?

His influence as a Congregational minister's son Signup and view all the answers

What did Curtis decide to do with the amount of money he had?

Buy a drink at a public house Signup and view all the answers

What did Jerry mean by 'desp'rit work, desp'rit ways'?

Normal actions are no longer adequate. Signup and view all the answers

How did Mrs. Curtis react after Curtis left?

She resumed her routine without comment Signup and view all the answers

What sound signified that there were no more disturbances from the room after Curtis's departure?

The buzzing of a clock Signup and view all the answers

Why did Curtis not foresee the consequences of his actions?

He was inexperienced in handling these situations Signup and view all the answers

What detail about Curtis's financial behavior is highlighted?

He was generous despite having little money Signup and view all the answers

Which element creates an atmosphere of isolation in the scene?

The muffled sounds of the street Signup and view all the answers

What action indicated that the room was empty and quiet?

A light shone under the door for hours Signup and view all the answers

What is Gunno Poison preparing to do with the materials he has?

Create an explosive setup Signup and view all the answers

How does Jerry Shand react to Sotcher's reluctance to participate?

He insists that Sotcher must participate Signup and view all the answers

What do women in the East End typically refer to when they say something is an 'expense'?

Something that is highly desired but unaffordable Signup and view all the answers

What does Sotcher primarily express throughout the interaction?

Fear about the consequences of joining Signup and view all the answers

What amount do mutes cost at a cheap funeral according to the passage?

Half-a-sovereign and their liquor Signup and view all the answers

What is Jerry's primary concern about having too many participants in the conspiracy?

They could get caught and inform authorities Signup and view all the answers

What did the doctor's assistant specifically mention the sick man must have?

A stimulant Signup and view all the answers

Why does Sotcher question why he must perform the task?

He believed he was not part of the plan early on Signup and view all the answers

Why did Mrs. Curtis express concern while discussing the cost of required needs?

She considered her financial situation Signup and view all the answers

What does Jerry suggest to Sotcher to bolster his courage?

Alcohol to calm his nerves Signup and view all the answers

How did Mrs. Manders react to the mention of port wine for the sick man's condition?

She was hesitant due to expense Signup and view all the answers

What is the tone of Jerry's dialogue with Sotcher?

Threatening and coercive Signup and view all the answers

What indication does Mrs. Curtis give about the urgency of the sick man's condition?

His critical need for nutrition Signup and view all the answers

What does the outcome indicate about the group dynamics in this conspiracy?

Fear and manipulation among members Signup and view all the answers

What was Mrs. Curtis’s response when asked about the affordability of the port wine?

She called it a great expense Signup and view all the answers

Which of the following best describes the mood of the conversation about the sick man’s needs?

Dismal and concerned Signup and view all the answers

What is Bob Jennings' outlook regarding the absence of the person he is waiting for?

He believes something has prevented her from arriving. Signup and view all the answers

How does Bob Jennings feel about his blue tie?

He believes she liked it on him. Signup and view all the answers

What does the characterization of Scuddy Lond imply about his past?

He has consistently made poor life choices. Signup and view all the answers

What literary technique is primarily depicted in Bob Jennings' repetitive engagement of waiting?

Symbolism Signup and view all the answers

What does Scuddy's name suggest about his identity?

It reflects a lack of personal identity and ties. Signup and view all the answers

What does the phrase 'very good-'arted' suggest about the woman Bob is waiting for?

She has a caring and kind nature. Signup and view all the answers

How does Bob Jennings deal with the actions of the 'hobbledehoys'?

He feels hurt but continues to maintain his dignity. Signup and view all the answers

How is Scuddy Lond's emotional state portrayed?

He experiences deep reflective moments of sadness. Signup and view all the answers

Study Notes

Hands-On Exercises Overview

Focus on various aspects of Golang including composite literals, slices, maps, and interfaces.
Promotes understanding of fundamental data structures, methods, and interface implementation.

Composite Literals

Slice Literal: Creates a slice using []type{...} syntax.
Map Literal: Creates a map using map[keyType]valueType{...} syntax.
Struct Literal: Instantiates a struct by directly assigning values to fields using {Field1: value1, Field2: value2}.

Loops and Indexing

For Range Loop: Iterates over elements in slices, maps, or arrays capturing index and value.
Value can be printed directly without the second return in a for range loop.

Functional Programming Concepts

Function structure: func (receiver) identifier(parameters) (returns) { }, where the receiver is the type of the method.
Functions can accept interfaces as parameters, allowing for more abstract and flexible code.

Methods and Interfaces

Method Attachment: Methods can be attached to types (e.g., square, circle) to perform actions such as calculating area.
Shape Interface: Defines a blueprint for types that implement an area method.
Info Function: Takes a shape interface and prints the area, allowing polymorphic behavior with different shapes.

Structs and Embedding

Create a person struct with specific fields and another secretAgent struct embedding person.
Each struct can have its own methods (e.g., pSpeak for person, saSpeak for secret agent) to provide unique functionalities.

Practical Applications

Hands-on exercises encourage practical application of concepts, such as creating interfaces and implementing them in real code scenarios.
Testing code in the Go Playground allows for immediate feedback and learning through practice.

Interface Implementation

Interface types can be created that require certain methods to be implemented by structs (e.g., both person and secretAgent must implement a defined interface).
Allows for greater flexibility and code reuse by defining functions that accept interface types as parameters.

Conspiracy and Conflict

Gunno Poison prepares for an explosion at the gas-works, showing a casual attitude toward destruction and chaos.
Sotcher expresses fear and protests against engaging in the dangerous activity; he feels unprepared and anxious about the consequences.
Jerry Shand emphasizes loyalty and commitment to the conspiracy, unwilling to allow any weak links or potential informants.
The group decides Sotcher is unreliable and discusses actions to ensure he does not betray their plans, demonstrating the high stakes involved.

Desperation and Threats

Sotcher, overwhelmed by fear, becomes emotional and desperate to escape the situation, begging for mercy.
Jerry Shand threatens physical harm if Sotcher refuses to cooperate and highlights the importance of conformity to group decisions.
The group ultimately decides the best way to eliminate the threat posed by Sotcher is to tie him to the explosive canister, underscoring the ruthless nature of their conspiracy.

The discussion of “expense” exemplifies the struggles of the East End community, hinting at the financial constraints faced by families during this period.
Mrs. Curtis manages household funds while expressing concern over the costs associated with caring for a sick family member.
The assistant doctor insists on the necessity of providing port wine for sustaining the sick man, revealing class differences and the accessibility of healthcare.

Deception and Hope

Bob Jennings waits in vain for a woman he loves, showcasing themes of longing and the emotional toll of unfulfilled expectations.
His continuous optimism in the face of abandonment illustrates a persistent hope that contrasts starkly with his deteriorating circumstances.
As days pass without her, Bob’s disheveled appearance reflects his growing despair, symbolizing how love and hope can lead to self-neglect.

Criminal Background and Circumstances

Scuddy Lond, nicknamed “the gun,” is presented as a victim of unfortunate circumstances, illustrating the broader theme of systemic issues leading to criminality.
The character’s reflections on his life reveal inner sensitivity, dispelling stereotypes of hardened criminals by highlighting vulnerability.
The use of nicknames among criminals serves as a commentary on social identity and the fragmented lives of those on the margins of society.

Summary of Themes

Themes of loyalty, betrayal, financial strain, hope, and the impact of social circumstances are interwoven throughout the narratives, offering a glimpse into the complexities of working-class life and desperation.

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Description

Dive into practical exercises for coding in Golang! This quiz covers various concepts including composite literals, slice and map literals, and utilizing the for range loop. Test your skills with hands-on coding challenges and improve your Go programming proficiency.