TypeScript 字符串操作：获取子字符串

Example

var str = "Apples are round, and apples are juicy."; 
var sliced = str.slice(3, -2); 
console.log(sliced);

On compiling, it will generate the same code in JavaScript.

Its output is as follows −

les are round, and apples are juic

TypeScript：Array some()

some() 检测Array中的元素，只要有一个通过就返回true，否则false

语法

array.some(callback[, thisObject]);

Parameter Details

• callback − Function to test for each element.

• thisObject − Object to use as this when executing callback.

例子

function isBigEnough(element, index, array) { 
   return (element >= 10); 
          
} 
          
var retval = [2, 5, 8, 1, 4].some(isBigEnough);
console.log("Returned value is : " + retval ); 
          
var retval = [12, 5, 8, 1, 4].some(isBigEnough); 
console.log("Returned value is : " + retval );

On compiling, it will generate the same code in JavaScript.

Its output is as follows −

Returned value is : false 
Returned value is : true

Golang例子：如何删除map的一个key？

Kiran Kumar Panigrahi 2021-11-01

To delete a key from a map, we can use Go's built-in delete function. It should be noted that when we delete a key from a map, its value will also be deleted as the key-value pair is like a single entity when it comes to maps in Go.

Syntax

The syntax of the delete function is shown below.

delete(map,key)

Golang例子：获取一年365天中的第几天

In this example, we will write a Golang program to find the current time of the year using YearDay function

package main

import (
   "fmt"
   "time"
)

func main() {
   currentTime := time.Now()
   yearDay := currentTime.YearDay()
   fmt.Printf("Today is day %d of the year.\n", yearDay)
}

Output

Today is day 93 of the year.