How to Recover panic in Golang
Defer, Panic, and Recover in Go.
panic
During a typical panic, normal execution stops, all deferred function calls in that goroutine are executed, and the program crashes with a log message.
package main
func main() {
panic("invalid")
}
...
How to Use Deferred Function Calls in Golang
Understanding defer in Go.
Deferred Function Calls
A defer statement is an ordinary function or method call prefixed by the keyword defer. The function and argument expressions are evaluated when the statement is executed, but the actual call is def...
How to Reverse a String in Rust
In Rust, there are 2 ways to reverse a string.
Using rev Function
The str::rev() function reverses an iterator’s direction.
See the following example:
fn main() {
let mut s = "Hello";
println!("{}", s.chars().rev().collect::<String>());...
How to Iterate Over a Slice in Reverse in Go
In Golang, there are 2 ways to iterate over a slice in reverse.
Using For Loop
There is no convenient operator for this to add to the range one in place. You'll have to do a normal for loop counting down.
See the following example:
package main...
How to Reverse a String in Python
In Python, there are 3 ways to reverse a string.
Using slicing
Slice notation takes the form [start:stop:step].
#!/usr/bin/python3
s = "Hello World"
print(s[::-1])
# syntax
# a[start:stop] # items start through stop-1
# a[start:] # items...
How to Check If an Object Is of a Given Type in Python
In Python, there are 2 ways to check if an object is of a given type.
Using isinstance Method
The isinstance(object, classinfo) method returns True if the object argument is an instance of the classinfo argument, or of a (direct, indirect, or virtua...
How to Make a Reverse Ordered For Loop in Rust
In Rust, using the rev() function is the easiest way to make a reverse ordered for loop.
Using rev Function
The .rev() function reverses an iterator’s direction. Usually, iterators iterate from left to right. After using rev(), an iterator will ins...
How to reverse a slice in Go
Reverse a Slice in Golang.Using a for Loop
The standard library does not have a built-in function for reversing a slice. Use a for loop to reverse a slice:
package main
import "fmt"
func main() {
s := []string{"b", "c", "d"}
for i := len(s)/...
How to reverse a string in Go
Reverse a String in Golang.Using range
a range on a string returns a rune which is a codepoint.
package main
import "fmt"
func Reverse(s string) (result string) {
for _, v := range s {
result = string(v) + result
}
return
}
func main() ...
How to reverse an array in PHP
Reverse the order of an array.Using array_reverse Function
The array_reverse() return an array with elements in reverse order.
$arr = array("PHP", 8.1, 4);
$reversed = array_reverse($arr);
print_r($reversed);
$preserved = array_reverse($arr, true);...
How to reverse a string in PHP
Reverse a Unicode String in PHP.Using strrev Function
The strrev() reverse a string.
// !olleH
echo strrev("Hello!");
// does not support utf-8 encoding
strrev("Hello,世界");
!olleH
Using For Loop
FOR LOOP will start with the value of the length o...
How to use the curl command in Linux
command line tool and library for transferring data with URLs.
cURL (pronounced 'curl') is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various network protocols. The name ...
How to use the ls command in Linux
List Files and Directories.The ls command lists files and directories within the file system, and shows detailed information about them. It is a part of the GNU core utilities package which is installed on all Linux distributions.
List all files, in...
How to use the Angular CLI serve command line
Builds and serves your app, rebuilding on file changes.
ng serve is a great command to use when developing your application locally. It starts up a local development server, which will serve your application while you are developing it. It is not mea...