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C++ 智能指针shared_ptr,weak_ptr,shared_from_this实践 - C/C++ - 清泛网 - 专注C/C++及内核技术

...指针 lock 时会加锁,因此尽量在最后线程控制权转移时候才lock,传递使用shared_ptr & 或 weak_ptr,可极大地减少锁次数,提高效率。(强指针赋值加锁,弱指针不加锁且对象很小在栈上完成拷贝,效率相差不大) 2438c++11,sh...
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js/php判断终端类型:PC访问、手机访问、微信访问 - 更多技术 - 清泛网 - ...

....href="https://www.tsingfun.com/index.php?m=wap"; } </script> 不过有时候还是后端判断直接定位相应模板来得直接,不用中转一道,这里提供php判断方法: // 判断是否是手机端 function is_mobile() { // 如果有HTTP_X_WAP_PROFILE则一定是移...
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【解决】double free or corruption (!prev) - C/C++ - 清泛网 - 专注C/C++及内核技术

...,如果操作不当,存储数据大于内存区大小,在free时候也会检测出来,报这个错误,如: char* buf = malloc(5); memcpy(buf, "123456", 6); free(buf); //free时报此错误 实际项目中可能此类问题没法直观定位到,推荐使用gcc自带 asan...
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安全工具将程序标记为病毒 - App应用开发 - 清泛IT社区,为创新赋能!

...也没有能力写出病毒,单纯工厂生产计算程序,但安装时候,提示没有备案或国外软件,安全扫描标记为病毒,是因为没有备案码?问deepseek,说不应该是备案,程序采用注册机制,用数据库验证注册名和注册码,别都是纯...
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Android selector & text color

...oding="utf-8"?&gt; &lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt; &lt;item android:state_pressed="true" android:color="#000000" /&gt; &lt;!-- pressed --&gt; &lt;item android:state_focused="true" android:color="#000000" /&gt; &lt;!-- focus...
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Using build types in Gradle to run same app that uses ContentProvider on one device

..."?&gt; &lt;account-authenticator xmlns:android="http://schemas.android.com/apk/res/android" android:accountType="@string/account_type" android:icon="@drawable/ic_launcher" android:smallIcon="@drawable/ic_launcher" ...
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Animate the transition between fragments

...fade_in.xml: &lt;objectAnimator xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:interpolator/accelerate_quad" android:valueFrom="0" android:valueTo="1" android:propertyName="alpha" android:duration="@android:integer/config_mediumAnimTime...
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十年磨一“饼” 一个70后连续创业者心路历程 - 资讯 - 清泛网 - 专注C/C+...

...底越来越强烈,梦想再一次被点燃…… 每每夜深人静时候,追忆这十年创业岁月,时光飞逝,一转眼自己就快到了“不惑”之年,创业这么久,有成功,有失败,也积累了些商业经验,可能生意和事业本质区别就是能否...
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Declaring a custom android UI element using XML

...l Include the namespace declaration xmlns:app="http://schemas.android.com/apk/res-auto" in the top level xml element. Namespaces provide a method to avoid the conflicts that sometimes occur when different schemas use the same element names (see this article for more info). The URL is simply a manne...
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How can I create a keystore?

... follow these steps: 1- On the menu bar, click Build &gt; Generate Signed APK. 2-On the Generate Signed APK Wizard window, click Create new to create a new keystore. If you already have a keystore, go to step 4. 3- On the New Key Store window, provide the required information as shown in figu...