NSString * nss=[strs stringByAppendingString:@"ssss"]; NSLog(@"%@",nss); 4.//替换某一指定的字符串 [strs replaceCharactersInRange:NSMakeRange(0,3) withString:@"dsf"]; NSLog(@"%@",strs ); 5.//该的首字附 大写 // NSString *ns22=[[NSString alloc]initWithFormat:@"dsf"]; // ...
}typeStringOrNumberFunc=(ns:string|number) =>void;letfunc:StringOrNumberFunc= fn;// 不能将类型“(x: string) => void”分配给类型“StringOrNumberFunc”。// 参数“x”和“ns” 的类型不兼容。// 不能将类型“string | number”分配给类型“string”。// 不能将类型“string | number”分配给类...
In the syntax below, we have implemented the custom algorithm to replace the part of the string with the new string. We used the substr() method to find the old substring.function replaceSubString( mainString: string, oldString: string, newString: string ): string { let tempString: string...
To check if a string starts or ends with specific characters: const filename = "document.txt"; console.log(filename.startsWith("doc")); // true console.log(filename.endsWith(".txt")); // true Checking for Empty Strings To check if a string is empty in TypeScript, you have several...
A typescript template string (or template literal) is a regular JavaScript string which is enclosed within the back-tick characters (`) seeded with multiple placeholders denoted with ${ }. At runtime, the code replaces the placeholders with their real values. The process of evaluating a templa...
import { Project } from './Project'; import React from 'react'; function formatDescription(description: string): string { return description.substring(0, 60) + '...'; } interface ProjectCardProps { project: Project; } function ProjectCard(props: ProjectCardProps) { const { project } = ...
replace() Replaces the matched substring with a new substring split() Splits the string into substrings and returns an array toUpperCase() Converts all the characters of the string into upper case toLowerCase() Converts all the characters of the string into lower case charCodeAt() Returns a...
constuserBioSchema=z.string().min(25,"Bio must be at least 25 characters long").max(120,"Bio must not exceet 120 characters"); As we continue with this tutorial, we’ll see similar patterns to add custom errors for invalidation for different data types. ...
At runtime, the code replaces the placeholders with real values. How to Perform String Interpolation in TypeScript? Let us see a few examples of Perform String Interpolation in TypeScript: Example #1 A basic example of TypeScript String Interpolation. ...
Head]&number>,Tail]:[Identifier<Head&string>,Tail]:[Identifier<T&string>,''];typeParseMember...