JunyiXie

import { LiquidityPoolKeysV4, MARKET_STATE_LAYOUT_V3, Market, TOKEN_PROGRAM_ID } from "@raydium-io/raydium-sdk";
import { Connection, Logs, ParsedInnerInstruction, ParsedInstruction, ParsedTransactionWithMeta, PartiallyDecodedInstruction, PublicKey } from "@solana/web3.js";

const RPC_ENDPOINT = 'https://api.mainnet-beta.solana.com';
const RAYDIUM_POOL_V4_PROGRAM_ID = '675kPX9MHTjS2zt1qfr1NYHuzeLXfQM9H24wFSUt1Mp8';
const SERUM_OPENBOOK_PROGRAM_ID = 'srmqPvymJeFKQ4zGQed1GFppgkRHL9kaELCbyksJtPX';
const SOL_MINT = 'So11111111111111111111111111111111111111112';
const SOL_DECIMALS = 9;

const connection = new Connection(RPC_ENDPOINT);

JunyiXie

+ (instancetype)imageWithLightImageBlock:(UIImage *(^)(void))lightImageBlock
                          darkImageBlock:(UIImage *(^)(void))darkImageBlock
{
    
    __block UIImage *image = nil;
    if (@available(iOS 13.0, *)) {
        UITraitCollection *const scaleTraitCollection = [UITraitCollection currentTraitCollection];
        
        UITraitCollection *const lightUnscaledTraitCollection = [UITraitCollection traitCollectionWithUserInterfaceStyle:UIUserInterfaceStyleLight];

JunyiXie

- (UIViewController *)topViewController{
  return [self topViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}

- (UIViewController *)topViewController:(UIViewController *)rootViewController
{
  if (rootViewController.presentedViewController == nil) {
    return rootViewController;
  }
  

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-(float)compareString:(NSString *)originalString withString:(NSString *)comparisonString
{
	// Normalize strings
	[originalString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
	[comparisonString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

	originalString = [originalString lowercaseString];
	comparisonString = [comparisonString lowercaseString];

	// Step 1 (Steps follow description at http://www.merriampark.com/ld.htm)

JunyiXie

进程和线程的概念：

线程（英语：thread）是操作系统能够进行运算调度的最小单位。

进程（英语：process），是计算机中已运行程序的实体/进程是具有独立功能的程序在一个数据集合上运行的过程，它是系统进行资源分配和调度的一个独立单位。

为什么引入进程和线程的概念

进程：更好的描述和控制程序的并发执行，实现操作系统的并发性和共享性。 线程：减少程序在并发执行是所付出的时空开销，提高操作系统的并发性能。

进程的特征