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'printf' vs. 'cout' in C++
... noise).
printf("0x%04x\n", 0x424);
std::cout << "0x" << std::hex << std::setfill('0') << std::setw(4) << 0x424 << std::endl;
Translation
This is where the real advantage of printf lies. The printf format string is well... a string. That makes it really easy t...
How to convert a number to string and vice versa in C++
...1.2 + 3 = 4.2"
You can use stream manipulators, such as std::endl, std::hex and functions std::setw(), std::setprecision() etc. with string streams in exactly the same manner as with cout
Do not confuse std::ostringstream with std::ostrstream. The latter is deprecated
Use boost lexical cast. If ...
Getting started with Haskell
...ain why entirely, and not clearly at all, and there's quite a bit of magic hex literals. You're just going through the motions. That wasn't the biggest issue for me tho, the biggest issue was that the book heavily depends on those kind of hard and long examples (long enough to take more than an enti...
Why does base64 encoding require padding if the input length is not divisible by 3?
... this paradigm. One byte is equal to one character in base256.
Base16, hexadecimal or hex, uses 4 bits for each character. One byte can represent two base16 characters.
Base64 does not fit evenly into the byte paradigm (nor does base32), unlike base256 and base16. All base64 characters can ...
Is there a unique Android device ID?
...Secure#ANDROID_ID returns the Android ID as an unique for each user 64-bit hex string.
import android.provider.Settings.Secure;
private String android_id = Secure.getString(getContext().getContentResolver(),
Secure.ANDROID_ID);
Also read Best...
程序员才能听得懂的笑话 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...，不信你来看看； 3.真是奇怪，刚刚还好好的； 4.肯定是数据问题； 5.你清下缓存试试； 6.重启下电脑试试； 7.你装的什么版本的类库（jdk） 8.这谁写的代码； 9.尼玛怎么还在用360安全浏览器；10.用户不会像你这么操作的。
44...
What techniques can be used to speed up C++ compilation times?
...ommand the --radix=d lets you see the sizes in decimal numbers (default is hex). Now by looking at the largest symbol, identify if you can break the corresponding class and try to redesign it by factoring the non-templated parts in a base class, or by splitting the class into multiple classes.
Metho...
C++常用排序算法汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...快速排序
* 不稳定排序，O{nlogn} ~ O{n^2}
* 适合排序大量数据
* 设最左边为基准数
* 右边往左找一个比基准数小的
* 左边往右找一个比基准数大的，和上一步交换
* 碰头后和基准数交换
*
* https://www.tsingfun.com
*************...
C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...String是读出的字符串
myFile.Close();
三、高级应用
读取xml数据，两种xml方式
第一种方法：
<aaa>
<bb>something</bb>
<cc>something</cc>
</aaa>
DS.ReadXml("your xmlfile name");
Container.DataItem("bb");
Container.DataItem("cc");
DS.ReadXmlSchema("your...
Android list view inside a scroll view
... listAdapter.getCount(); i < len; i++) { // listAdapter.getCount()返回数据项的数目
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0); // 计算子项View 的宽高
totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总...