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Code snippets

Snippet 1

var maxC rune = -1

for _, r := range text {
   if unicode.IsUpper(r) && r > maxC {
      maxC = r
   }
}

Snippet 2

product := 1

for i := 0; i < DIM; i++ {
   product *= numbers[i]
}

Snippet 3

lastRainyDay := -1

for i, measure := range mmRain {
   if measure > 0 {
      lastRainyDay = i
   }
}

Snippet 4

sum := 0

for i := 0; i < DIM; i++ {
   if numbers[i]%3 == 0 {
      sum += numbers[i]
   }
}

Snippet 5

for i := 1; i < DIM; i++ {
    fmt.Println(numbers[i] - numbers[i-1])
}

Snippet 6 

sum := 0
i := 0
for sum <  TARGET {
    sum += numbers[i]
    i++
    if sum >= TARGET {
        break
    }
}
fmt.Println(TARGET,"reached at",i)

Snippet 7

var min byte = text[0]

for i := 1; i < DIM; i++ {
    if text[i] < min {
        min = text[i]
    }
}

Snippet 8

alternating := true

for i := 1; i < DIM; i++ {
    if (numbers[i] > 0) == (numbers[i-1] > 0) {
        alternating = false
        break
    }
}

Snippet 9

var previous rune = text[0]

for _, current := range text {
    if current < previous {
        fmt.Println()
    }
    fmt.Print(string(current), " ")
    previous = current
}

Analyze the code snippets above and then write the answers to the following questions

  1. What is the purpose of each snippet? Match each one to one of the following descriptions:
  1. Identify the last rainy day.
  2. Sum the numbers that are multple of 3.
  3. Find the “greatest” capital letter (the one with the highest alphabet position).
  4. Divide a sequence of characters in its increasing subsequences (sequences of characters in increasing alphabetical positions).
  5. Find the smallest character (the one with the least ASCII code).
  6. Compute the differences between consecutive numbers in a a sequence.
  7. Compute the product of a sequence of numbers.
  8. Check if the numbers in a sequence alternate between positive and negative.
  9. Establish when the sum of a sequenze of numbers exceeds a given bound.

  1. Cluster the code snippets based on similarities. Which similarities can you find? (otherwise said: which criterium -or criteria- did you use to cluster them?)

  2. What do the following snippets have in common?

  1. snippets 1, 3, and 9?
  2. snippets 2, 4, and 5?
  3. snippets 6 and 8?
  4. snippets 1 and 9?
  5. snippets 4 and 8?
  1. What do the following snippets have in common?
  1. snippets 5, 8 and 9?
  2. snippets 1 and 7?
  3. snippets 2, 4 and 6?
  1. The following pairs of snippets have similar structures and carry out somewhat similar tasks, but not identical. What structural, and thus semantic differences do they exhibit?
  1. snippets 2 and 4?
  2. snippets 1 and 3?