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const std = @import("std");
const ustreamer = @cImport({
    @cInclude("hash.c");
});
pub fn main() !void {
    // Prints to stderr (it's a shortcut based on `std.io.getStdErr()`)
    std.debug.print("All your {s} are belong to us.\n", .{"codebase"});

    // stdout is for the actual output of your application, for example if you
    // are implementing gzip, then only the compressed bytes should be sent to

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/*
 * Author : Pierre-Henri Symoneaux
 */

#include <stdlib.h>
#include <string.h>

//Hashtable element structure
typedef struct hash_elem_t {
	struct hash_elem_t* next; // Next element in case of a collision

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const expect = @import("std").testing.expect;
const std = @import("std");
const ArrayList = std.ArrayList;
const eql = std.mem.eql;
const Allocator = std.mem.Allocator;
const print = std.debug.print;
const LispError = error{ fnnotdef, symbolnotdef };
pub const String = struct {
    buffer: ArrayList(u8),
    pub fn toNumber(self: *String) !f64 {

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// src from:https://www.cnswift.org/error-handling
struct Item {
    var price: Int
    var count: Int
}
//定义异常-枚举是典型的为一组相关错误条件建模的完美配适类型，关联值还允许错误错误通讯携带额外的信息。比如说，这是你可能会想到的游戏里自动售货机会遇到的错误条件：
enum VendingMachineError: Error {
    case invalidSelection
    case insufficientFunds(coinsNeeded: Int)
    case outOfStock

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import UIKit
class Statement{
    var db :OpaquePointer?
    var Statement: OpaquePointer?
    init(_ db :OpaquePointer?) {
        self.db = db
    }
    func prepare(_ sql : String) throws{
        let presult = sqlite3_prepare_v2(db, sql, -1, &Statement, nil)
        if presult != SQLITE_OK{

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import UIKit
class CellData{
    var _str:String
    var _b : Bool
    var str:String{get{return _str}set(value){_str = value}}
    var b : Bool{get{return _b}set(value){
        _b = value
        arr.u(self)
    }}
    init(str: String, b: Bool) {

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#include <iostream>
#include <assert.h>
#include <tchar.h>

int main(){
	//single byte
	const char* str1 = "hello";
	assert(strlen(str1) == 5);
	// error for double byte
	const char* str2 = "你好";

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#include <iostream>
#include <assert.h>
void swap(int a, int b) {
    int c = a;
    a = b;
    b = c;
    assert(a == 1 && b == 0);
}
void swap_pointer(int* a, int* b) {
    int c = *a;

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#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <list>
#include <map>

// return given mumber as a string
std::string str(long n) { std::ostringstream os; os << n; return os.str(); }

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// v2ex不容易看到对话。于是我写了一个爬虫，抓出两人的对话，谁是谁非，大家自行判断。哈哈有趣。
/*
Title:从v2ex内提取两人的对话	
Paramters:PostID,userid1,userid2
Procedure:
  1. 提出对应帖子的全部回复
	2. 过滤条件：是IDList内的id发出的帖子，并且帖子内@了另外一个id的
	3. 帖子字段保留
API:
  获取指定主题下的回复