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How do you calculate log base 2 in Java for integers?
.... For example, Math.ceil(Math.log(1<<29) / Math.log(2)) is 30 on my PC where mathematically it should be exactly 29. I didn't find a value for x where (int)(Math.log(x)/Math.log(2)) fails (just because there are only 32 "dangerous" values), but it does not mean that it will work the same way ...
SQL update query using joins
...r your requirement:
UPDATE
shopping_cart sc
LEFT JOIN
package pc ON sc. package_id = pc.id
SET
sc. amount = pc.amount
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Running Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 on the same machine
...
I wouldn't do it. Use virtual PCs instead. It might take a little setup, but you'll thank yourself in the long run. In my experience, you can't really get them cleanly installed side by side and unless they are standalone installs you can't really verify ...
What is the difference between a process and a thread?
...of execution, maintaining the thread's state via a single program counter (PC), and set of registers. But what happens when there's a cache miss? It takes a long time to fetch data from main memory, and while that's happening the CPU is just sitting there idle. So someone had the idea to basicall...
Boost程序库完全开发指南——深入C++“准”标准库高清PDF版 - 文档下载 - ...
Boost程序库完全开发指南——深入C++“准”标准库高清PDF版C++ Boost 标准库Boost是一个功能强大、构造精巧、跨平台、开源并且完全免费的C++程序库，有着C++‘准’标准库的美誉。它由C++标准委员会部分成员...Boost是一个功能...
Chrome's remote debugging (USB debugging) not working for Samsung Galaxy S3 running android 4.3
... USB Debugging," which is what is supposed to happen when you connect to a PC. When I ran adb devices on my PC, it listed my device, and then on the device screen the "Allow USB Debugging" prompt came up. From there on out, it worked!
– Josh
Jul 28 '14 at 18:04...
print call stack in C or C++
...xt);
while (unw_step(&cursor) > 0) {
unw_word_t offset, pc;
unw_get_reg(&cursor, UNW_REG_IP, &pc);
if (pc == 0) {
break;
}
printf("0x%lx:", pc);
if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {
...
windows版 svn 服务器搭建及总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
windows版 svn 服务器搭建及总结一直是在用svn客户端，因为一些需求需要自己搭建svn服务器。1.下载svn服务器版本，网上遍地都是，下载下来后，解压，一路next 即可。我的...一直是在用svn客户端，因为一些需求需要自己搭建svn服...
View contents of database file in Android Studio
...load and install SQLiteBrowser.
Copy the database from the device to your PC:
Android Studio versions < 3.0:
Open DDMS via Tools > Android > Android Device Monitor
Click on your device on the left.
You should see your application:
Go to File Explorer (one of the tabs on the right), go...
How do I find out my MySQL URL, host, port and username?
..._name | Value |
+---------------+-----------+
| hostname | karola-pc |
+---------------+-----------+
1 row in set (0.00 sec)
For Example in my case : karola-pc is the host name of the box where my mysql is running. And it my local PC host name.
If it is romote box than you can ping tha...