这是初始化类变量的两种方法.
class Test {
private $var1;
private $var2;
public function Test($var1,$var1) {
$this->var1 = $var1;
$this->var2 = $var2;
}
}
$objTest = new Test("value1","value2");
class Test {
private $var1;
private $var2;
public function _set($var, $value) {
$this->$$var = $value
}
}
$objTest = new Test();
$objTest->_set('var1','value1');
$objTest->_set('var2','value2');
现在,这两种方法都是有效的,但我想知道哪种方法更好？只坚持一种方法的利弊是什么？
我有一个像这样的hashmap:
HashMap<String, String[]> map = new HashMap<String, String[]>();
欲将此转换为一个数组,说温度[],含有作为第一值从HashMap中的密钥和作为第二字符串[] - 从地图数组,也可作为阵列.这可能吗？怎么样？
我需要在程序中为getchar()添加一个超时函数.
我该怎么办,当我的程序到达指令getchar()时,它只会等待一段时间让用户进行击键,如果用户没有在给定的时间限制内进行击键,程序将"跳过"getchar()？
操作系统不支持conio.h库,因此kbhit不是一个选项.
我试图抓住一个手势,但它不起作用.这是我的代码:
UISwipeGestureRecognizer *recognizer;
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionLeft)];
[[self view] addGestureRecognizer:recognizer];
[recognizer release];
和
-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer {
NSLog(@"get gesture");
if (recognizer.direction == UISwipeGestureRecognizerDirectionRight) {
NSLog(@"get gesture right");
}
if (recognizer.direction == UISwipeGestureRecognizerDirectionLeft) {
NSLog(@"get gesture Left");
}
}
它总是得到一个手势,但不认识方向.我也试过if(recognizer.direction){NSLog(@"get gesture");},它也有效,所以我不明白我犯了哪个错误.
谢谢你的帮助.
我有一个带面板的表格.
我在运行时创建框架,并通过将框架的父属性设置为面板在面板上显示它们.
在创建面板时,我没有设置所有者属性,因为我自己管理框架的生命周期.
直到现在我没有问题.接下来,我在框架上放置一个TActionList,并在动作上添加一些快捷方式.
我发现直到我将框架的所有者属性设置为面板后才执行我的操作.
有人可以解释一下吗？我认为所有者属性只是关于组件负责释放子组件,而不负责转发关键事件.
我想知道什么是线程安全的？如何开始学习c#中的线程安全programmimg？线程在Web开发中的作用是什么？
以下查询花费太多时间,很可能是因为"不在"使用.
你能建议改进吗？
SELECT vcode,
vname,
1014 AS fid
FROM testcodes co
WHERE co.vcode NOT IN (SELECT dict.vcode
FROM datadictionary dict
WHERE dict.fid = 1014)
关于结构的一件事是.vCode,vName是varchar,testCodes和DataDictionary具有相同的结构.
我搜索了这个问题,发现左连接可以解决这个问题？(为什么它做得更好,如何做到)？
有人可以指导它是否可以改进???
我正在使用Zend_Mail解析电子邮件,奇怪的是一些内容在没有明显原因的情况下被截断,并且使电子邮件部分出错.
例如
Content-Disposition: attachment; filename="file.sdv"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被截断为
Content-Disposition: attachment; filename="file.sdv"
DQogICAgICBTT05FO0xBTkRJTkdTREE7U0FMR1NEQVRPIDtOQVNKIDtSRURTS0FQICAgICAgICAg
ICAgIDsgRklTS0VTTEFHO1BSRVNFUlYgICA7ICBUSUxTVEFORDsgU1TYUlJFTFNFOyAgS1ZBTElU
RVQ7T01TVFlQRSAgO01JTlNURVBSSVM7ICAgICBWRVJESTsgICBLVkFOVFVNOyAgUlVORFZFS1Qg
IA0KLS0tLS0tLS0tLTstLS0tLS0tLS0tOy0tLS0tLS0tLS07LS0tLS07LS0tLS0tLS0tLS0tLS0t
LS0tLS07LS0tLS0tLS0tLTstLS0tLS0tLS0tOy0tLS0tLS0tLS07LS0tLS0tLS0tLTstLS0tLS0t
LS
每行的var_dump显示了这一点.
string(78) "DQogICAgICBTT05FO0xBTkRJTkdTREE7U0FMR1NEQVRPIDtOQVNKIDtSRURTS0FQICAgICAgICAg
"
string(78) "ICAgIDsgRklTS0VTTEFHO1BSRVNFUlYgICA7ICBUSUxTVEFORDsgU1TYUlJFTFNFOyAgS1ZBTElU
"
string(78) "RVQ7T01TVFlQRSAgO01JTlNURVBSSVM7ICAgICBWRVJESTsgICBLVkFOVFVNOyAgUlVORFZFS1Qg
"
string(78) "IA0KLS0tLS0tLS0tLTstLS0tLS0tLS0tOy0tLS0tLS0tLS07LS0tLS07LS0tLS0tLS0tLS0tLS0t
"
string(78) "LS0tLS07LS0tLS0tLS0tLTstLS0tLS0tLS0tOy0tLS0tLS0tLS07LS0tLS0tLS0tLTstLS0tLS0t
"
string(5) "LS)
"
string(17) "TAG5 OK Success
"
或者在其他电子邮箱中
DQogICAgICBTT05FO0xBTkRJTkdTREE7U0FMR1NEQVRPIDtOQVNKIDtSRURTS0FQICAgICAgICAg
ICAgIDsgRklTS0VTTEFHO1BSRVNFUlYgICA7ICBUSUxTVEFORDsgU1TYUlJFTFNFOyAgS1ZBTElU
RVQ7T01TVFlQRSAgO01JTlNURVBSSVM7ICAgICBWRVJESTsgICBLVkFOVFVNOyAgUlVORFZFS1Qg
IA0KLS0tLS0tLS0tLTstLS0tLS0tLS0tOy0tLS0tLS0tLS07LS0tLS07LS0tLS0tLS0tLS0tLS0t
LS0tLS07LS0tLS0tLS0tLTstLS0tLS0tLS0tOy0tLS0tLS0tLS07LS0tLS0tLS0tLTstLS0tLS0t
LS0tOy0tLS0tLS0tLTstLS0tLS0tLS0tO
我无法弄清楚为什么要停在那里.传输应该只停留在行尾.这是从IMAP服务器获取字符串的行.
$line = @fgets($this->_socket);
编码文本包含类似的字符串,但同样会在不同电子邮件的各个部分中截断.
----------;----------;----------;-----;--------------------;----------;----------;--
我试图为fgets()添加一个大小,但没有结果.我还启用/禁用了"auto_detect_line_endings"php_ini设置,再次没有结果.
我还用ZF 打开了一个错误报告,尽管错误似乎不在库中.
你看到这个编码的字符串有什么奇怪的吗？
UPDATE
新的研究表明,电子邮件在584个字符后被截断.还是不知道为什么.向谷歌发送了一个问题.看到这里.
电子邮件标头错误:
Delivered-To: email@removed.com
Received: by 10.216.3.208 with SMTP …我安装了Firefox 3.6.15,Firebug和FirePHP插件,启用了控制台.我正在使用Zend 1.11.以下代码未在firebug控制台中显示任何内容.
<?php
require_once('Zend/Log.php');
require_once('Zend/Log/Writer/Firebug.php');
$writer = new Zend_Log_Writer_Firebug();
$logger = new Zend_Log($writer);
$logger->info('info message');
$logger->warn('warning message');
$logger->err('error message');
?>
我尝试使用FirePHP核心库,这有效 -
<?php
require_once('FirePHPCore/FirePHP.class.php');
ob_start();
$firephp = FirePHP::getInstance(true);
$var = array('i'=>10, 'j'=>20);
$firephp->log($var, 'Iterators');
?>
想让Zend的东西起作用.任何的想法？
我尝试了这个,但它没有用.
#include <string>
string someString("This is a string.");
printf("%s\n", someString);