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 Extract All the Numbers Contained in a String in Python
In Python, there are 2 ways to extract all the numbers contained in a string.
Using List Comprehension
List comprehensions provide a concise way to create lists.
If you only want to extract only positive integers, try the following:
#!/usr/bin/...
How to Remove a Trailing Newline in Python
In Python, there are 4 ways to remove a trailing newline.
Using rstrip Method
The str.rstrip() method returns a copy of the string with trailing characters removed. For example,
#!/usr/bin/python3
s = "\nab c\r\n"
# str.rstrip([chars])
n = s....
How to Get the Current Time in Python
In Python, there are 2 ways to get the current time.
Using datetime Module
The datetime module supplies classes for manipulating dates and times. See the following example:
#!/usr/bin/python3
# -*- coding: utf8 -*-
# Import module
import datet...
How To Install Go in Linux
In Golang, there are 2 ways to install Go in Linux.Download Packages
Download packages for Windows 64-bit, macOS, Linux, and more.
Go install
Linux
Remove any previous Go installation by deleting the /usr/local/go folder (if it exists), then extr...
How To Make a For Loop and Range in Rust
In Rust, there are 3 ways to support For Loop expression.Using while Expression
A while loop begins by evaluating the boolean loop conditional operand.
fn main() {
let mut i = 0;
while i < 3 {
println!("{}", i);
i += 1;
}
// Vec
...
How to Read a File Line-by-Line in Python
In Python, there are 3 ways to read a file line-by-line.
Using For Loop
For reading lines from a file, you can loop over the file object. This is memory efficient, fast, and leads to simple code:
#!/usr/bin/python3
# -*- coding: utf8 -*-
# read a...
How to print a formatted string in Rust
Rust String Formatting and Printing Best Practices.Using println!
Prints to the standard output, with a newline. Use the format! syntax to write data to the standard output. See std::fmt for more information.
fn main() {
let name = "Bob";
pri...
How To Install Rust in Linux
In Rust, there are two ways to install rust in Linux.Running the following in your terminal
If you’re running macOS, Linux, or another Unix-like OS. To download Rustup and install Rust, run the following in your terminal, then follow the on-screen i...
How to convert an int to a string type in Go
3 ways to convert int64 to string in Golang.Using strconv.Itoa Function
The code snippet below shows how to convert an int to a string using the Itoa function.
package main
import (
"fmt"
"strconv"
)
func main() {
s := strconv.Itoa(100)
f...
How to format a string in Python
Python String Formatting Best Practices.Fancier Output Formatting
To use formatted string literals, begin a string with f or F before the opening quotation mark or triple quotation mark. Inside this string, you can write a Python expression between {...
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 convert string to json in Python
Converting Json to string in Python.Decoding JSON
To convert string to json in Python, use the json.loads() function. The json.loads() is a built-in Python function that accepts a valid json string and returns a dictionary to access all elements. The...
Built-in Types in Python
Python’s Core Data Types.Core Data Types
The principal built-in types are numerics, sequences, mappings, classes, instances and exceptions.
Built-in objects preview:
Object type:
Numbersint, float, complex.Strings'spam', "Bob's", b'a\x01c', u'sp\xc4m...
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 ...