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Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABL...
运行故障：edu.mit.appinventor aicompanion3: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. Strongly consider using FLAG IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being ...
Call to ‘set-and-coerce-property!’ has too few arguments (3; must be...
编译apk，报错：Call to ‘set-and-coerce-property!’ has too few arguments (3; must be 4)
原因是因为代码块有问题/报错，有空的地方没有填值，比如这种：
参考：https://community.appinventor.mi ... 3-must-be-4/20690/4
又学习到了新bug的解决方法...
Service and Characteristic are not published by the connected device -...
Service and Characteristic are not published by the connected device，报错如下：
问题原因：硬件/蓝牙芯片问题导致的，比如A硬件测试好的，换了B硬件没有修改uuid，就出现这个报错。
由于B硬件没有发布这些特征，就会报这个错误。
Is the pImpl idiom really used in practice?
...about the implementation or just break the encapsulation by using terrible casting tricks. PIMPL solves/mitigates that.
Compilation time
Compilation time is decreased, since only the source (implementation) file of X needs to be rebuilt when you add/remove fields and/or methods to the XImpl class...
Why exactly is eval evil?
...nic or other)
pointers
restartable exceptions
self-modifying code
...and a cast of thousands.
If you find yourself having to use any of these powerful, potentially dangerous tools ask yourself three times "why?" in a chain. For example:
"Why do I have to use eval?"
"Because of foo." "Why ...
c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
Long time reader first time poster! I'm playing around with the boost::multi_index container stuff and have a rather in-depth question that hopefully a boost or C++ container expert might know (my knowledge in C++ containers is pretty basic). For reference, the boost documentation on composite keys ...
What's the meaning of interface{}?
...mment by @NickCraig-Wood. interface{} can point to anything and you need a cast/type assertion to use it.
package main
import (
. "fmt"
"strconv"
)
var c = cat("Fish")
var d = dog("Bone")
func main() {
var i interface{} = c
switch i.(type) {
case cat:
c.Eat() // Fish...
安装Adobe cs6出错：“please uninstall and reinstall the product” - 环...
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配置错误
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请卸载并重新安装该产品。
如果此问题仍然存在，请与 Adobe 技术支持联系以获得帮助，并提供屏幕下方显示的错误代码。
错误:16
http://www.adobe.com/cn/support/
-------------...
NSIS做的安装程序，可接受命令行参数，实现静默安装，静默卸载 - 脚本技术 ...
命令参数 /D=xxx 可以指定安装包的安装路径，覆盖安装包中设置的默认路径及注册表中默认路径。但是，/D= 后面一定不能有引号（不能写成 /D="xxx"），否则不生效，仍然按照安装包中的默认路径安装。
更多请参考英文资...
Unicode and UTF-8 - 综合 - 清泛IT论坛，有思想、有深度
Unicode预订的编码空间大小为0x0-0x10FFFF，最多可以容纳1114112（100多万）个字符，实际上并不能使用这么多的空间，于是编码方式出现了两种：ucs-2(BMP)和ucs-4 编码方式，其中,bmp是Basic Multilingual Plane的简写。
一个字符的Unicode编码(...