How to Use the Constant Generator iota in Golang
Working with Constants and iota in Go.
The Constant Generator iota
Here’s an example from the time package, which defines named constants of type Weekday for the days of the week, starting with zero for Sunday. Types of this kind are often called en...
How to Convert the Fahrenheit to Celsius in Golang
Calculate degrees celcius from farenheit in Go.
Following program shows you how to convert fahrenheit to celsius.
The function FToC below encapsu- lates the temperature conversion logic so that it is defined only once but may be used from multiple p...
How to Add Two Numbers in Go
An example program using numbers.
Integers And Floating Point Numbers
Go has several different types to represent numbers. Generally we split numbers into two different kinds: integers and floating-point numbers.
Make a main.go file containing the ...
How to Make a List of Alphabet Characters in Python
In Python, there are 2 ways to make a list of alphabet characters.
Using string Module
The string.ascii_lowercase is a pre-initialized string used as string constant. In Python, string ascii_lowercase will give the lowercase letters ‘abcdefghijklmno...
How to Append Text to a File in Go
In Golang, using the os.O_APPEND flag is the easiest way to append text to a file
Using os.OpenFile Function
OpenFile is the generalized open call; most users will use Open or Create instead. It opens the named file with specified flag (O_RDONLY etc...
How to Convert a Str to a &[u8] in Rust
In Rust, there are 2 ways to convert a str to a &[u8].
Using as_bytes Function
The as_bytes() method converts a string slice to a byte slice. To convert the byte slice back into a string slice, use the from_utf8 function.
See the following example...
How to Get the Maximum Value for an Int Type in Go
In Golang, there are 2 ways to get the maximum value for an int type.
Using constant values
Since integer types use two's complement arithmetic, you can infer the min/max constant values for int and uint. For example,
package main
import (
"...
How to Limit Floats to Two Decimal Points in Python
In Python, there are 4 ways to limit floats to two decimal points.
Using format Method
You can use str.format() function to limit floats, it really simple. For example,
#!/usr/bin/python3
# -*- coding: utf8 -*-
f = 13.949999999999999
print("{:...
How to format a date or time in Go
In Golang, there are two ways to format the time.The layout string
Go doesn’t use yyyy-mm-dd layout to format a time. Instead, you format a special layout parameter.
2006-01-02 15:04:05.999999999 -0700 MST
package main
import (
"fmt"
"tim...
How to calculate CRC32 checksum in Python
Python Examples of zlib.crc32Cyclic redundancy check
A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to digital data.
Using zlib.crc32 Function
Computes a C...
How to use string constants in Python
String Constants Best Practice.String Constants in Python
The constants defined in this module are:
String constants:
string.ascii_lettersThe concatenation of the ascii_lowercase and ascii_uppercase constants described below. This value is not locale...
How to get a substring from a string in Go
Extracting substrings in Go.Using the slice syntax
A slice is formed by specifying two indices, a low and high bound, separated by a colon:
// a[low : high]
s := "Hello,世界"
// e
fmt.Println(s[1:2])
fmt.Println(s[1:])
// Hello,世界
fmt.Println(s[:])
...
How many keywords are there in Go
List of Golang Keywords.
Keywords
The following keywords are reserved and may not be used as identifiers.
break default func interface select
case defer go map struct
chan else goto package switch
const ...