How to write CSV file in Golang
How to write CSV file in Golang using writer from encoding/csv
package. For this example we took an simple example of a CSV file containing three columns name, address and phone.
How to measure execution time in Golang
To mesure the time used by an application in Golang or of a code section the functions time.Now()
and time.Since()
can be used.
How to generate a random int in Golang
In Golang there a are two libraries for generating random integers, one is a pseudo-random number generator (package math/rand
) and the second one is cryptographically secure random number generator (package crypto/rand
)
How to trim whitespace from string in Golang
How to trim (remove) leading and trailing whitespace from string in Golang using the TrimSpace
, Trim
, TrimLeft
, TrimRight
methods from strings
package.
How to get the dimensions of an image in Golang
Here are two simple methods to get the dimensions of an image in Golang: using image.DecodeConfig
method if the image is not already loaded and image.Decode
method is the image is loaded.
How to split a string into slice in Golang
How to split a string into slice using Golang. For a simple split by a singular character you can use Split()
method from strings
package. For more complex rules the regexp.Split()
method can be used.