Extracting members of a collection that match some filtering predicate is a common pattern in programming. Traditionally we would iterate over all members (e.g. with a for or foreach loop), and save each member matching some condition. Most programming languages now provide some single step filter function to eliminate …

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A core feature of all programming languages is the trusty for loop. For loops execute a statement a predefined number of times with some way to exit the loop early. Swift Swift uses range operators to construct simple for loops. 1let start = 0 2let end = 10 3 4for i in start ... end { 5 print(i) // prints 0 through 10 …

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Most modern languages support the ability for asynchronous function calls to be called from synchronous code blocks. This language feature is usually called async/await. This post is a brief syntax scratchpad comparing async/await in different languages. Swift In Swift, an await-able async function is created by adding …

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ForEach is a common pattern in programming modern programming languages. Prior to ForEach, the standard approach to iterating over an array of objects was to use a for loop stepping from the first index to the last. ForEach syntax has extra utility in languages that support many types of collections: a list iterated …

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