The year is 1984. Brazil is under a military dictatorship. As part of their colossal mismanagement of the country’s economy, which would result in over 1.2 trillion US Dollars in foreign debt at current values, and hiperinflation that reached over 200% a year, the military government had instituted protectionist …

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This is part 23 of my journey learning Golang. Random number generators For some kinds of programs, like simulations, games, or test code, it is useful to be able to generate unpredictable sequences of numbers. While generating truly random numbers is a hard problem (see RANDOM.ORG), a common alternative is to use a …

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This is part 22 of my journey learning Golang. Variable scopes A common source of errors in programming is using the same variable in many different parts of a program. For a deep dive into the problems that this practice can cause, take a look at Global Variables Are Bad. A common solution that is adopted by most …

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This is part 21 of my journey learning Golang. Chained conditions It is a common pattern for a program to have a sequence of conditional statements testing for different values of the same variable or function result. For instance: 1package main 2 3import ( 4 "fmt" 5) 6 7func main() { 8 x := 0 9 y := 0 10 for command …

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This is part 20 of my journey learning Golang. Boolean algebra Boolean algebra is about logical operations applied to the boolean values true and false. The most common operations are “and” (conjunction), “or” (disjunction) and “not” (negation). Fun fact: it is called “boolean” because it was introduced by George Boole …

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This is part 19 of my journey learning Golang. Conditionals Any program can be written in terms of three control structures: the sequence structure, in which expressions are executed in sequence, one after the other, in the order that they are written; the selection structure, in which a statement can be executed or …

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This is part 18 of my journey learning Golang. Command line interface When building programs that run on a terminal it is often useful to be able to allow the user to enter text. For instance the ssh-keygen utility will prompt for a path and a passphrase. 1❯ ssh-keygen -t rsa -b 4096 -C "your_email@example.com" …

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This is part 17 of my journey learning Golang. The fmt package has methods like Print, Println and Printf to print text to the standard output device. It also has corresponding methods that return the strings that would be printed out, instead of actually printing them out. Afterwards the program can use the returned …

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This is part 16 of my journey learning Golang. The Printf method The Printf method from the fmt package writes a formatted string to standard output. Printf makes it possible to interpolate strings. This is done by leaving placeholders in a string, and using values to fill in these placeholders. Printf syntax Printf …

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Google has a free tool called Search Console that “help you measure your site’s Search traffic and performance, fix issues, and make your site shine in Google Search results”. This is super handy to make sure that your website is being properly indexed by Google, to keep on top of how much traffic it is getting, and to …

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