Pablo Cattaneo pablocattaneo

pablocattaneo / How to check what version of Java I have installed.sh

Created January 28, 2026 13:47

java --version

pablocattaneo / how to compare maps in golang.go

Last active January 26, 2026 15:04

pablocattaneo / how to create and initialize a map in golang.go

Last active January 26, 2026 14:52

	// syntax: mapLiteral := map[keyType]valueType{ key1: value1, key2: value2, }
	myMap2 := map[string]string{
	"name": "Alice",
	"country": "Wonderland",
	}
	fmt.Println("Second map:", myMap2)

pablocattaneo / how to check if a key has a value.go

Created January 26, 2026 14:00

	myMap := make(map[string]int)
	myMap["key1"] = 15
	myMap["key2"] = 100
	myMap["key3"] = 7
	myMap["key4"] = 23

	value, exists := myMap["key1"]
	fmt.Println("Value for key1:", value, "Exists:", exists) //Value for key1: 15 Exists: true
	valueOfKey10, existsKey10 := myMap["key10"]
	fmt.Println("Value for key10:", valueOfKey10, "Exists:", existsKey10) // Value for key10: 0 Exists: false

pablocattaneo / how to delete all key and values in a map in golan.go

Last active January 26, 2026 13:50

-	myMap := make(map[string]int)
-	myMap["key1"] = 15
-	myMap["key2"] = 100
-	myMap["key3"] = 7
-	myMap["key4"] = 23
-	// clear syntax: clear(mapVariable)
-	clear(myMap)
-	fmt.Println("Map after clearing:", myMap)

pablocattaneo / how to delete a key in map in golang.go

Created January 26, 2026 13:46

-	// delete syntax: delete(mapVariable, key)
-	myMap := make(map[string]int)
-	myMap["key1"] = 9
-	delete(myMap, "key1")

pablocattaneo / how to compare slices in go.go

Last active January 14, 2026 12:39

	//slices.Equal(slice1, slice2)

	a := [5]int{1, 2, 3, 4, 5}
	slices1 := a[1:4] // from index 1 to index 3
	sliceCopy := make([]int, len(slices1))

	if slices.Equal(slices1, sliceCopy) {
	fmt.Println("slices1 and sliceCopy are equal")
	} else {
	fmt.Println("slices1 and sliceCopy are not equal")

pablocattaneo / how to create an slice in Go.go

Last active January 10, 2026 18:24

	// []T{e1, e2, e3, ...}
	// Where T is the type of the elements (e.g., int, string, bool, struct),
	// and e1, e2, e3, etc., are the initial elements of the slice
	fruits := []string{"Apple", "Banana", "Orange"}

pablocattaneo / how to iterate an array in Go.go

Created January 8, 2026 13:19

	fruits := [4]string{"Apple", "Banana", "Orange", "Grapes"}

	for index, fruit := range fruits {
	fmt.Println(position, fruitName)
	}

	for i, v := range fruits {
	fmt.Println(i, v)
	}

pablocattaneo / how to create and initialize a string array.go

Last active January 6, 2026 12:13

	package main

	import "fmt"

	func main() {
	fruits := [4]string{"Apple", "Banana", "Orange", "Grapes"}
	fmt.Println("Fruits array:", fruits)
	}