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Vertically align an image inside a div with responsive height
...time:
Vertical Alignment
1) In this approach, we create an inline-block (pseudo-)element as the first (or last) child of the parent, and set its height property to 100% to take all the height of its parent.
2) Also, adding vertical-align: middle keeps the inline(-block) elements at the middle of ...
How to limit the maximum value of a numeric field in a Django model?
...e I think about this, I realize how useful this would be for many Django apps. Perhaps a IntegerRangeField type could be submitted as a patch for the Django devs to consider adding to trunk.
This is working for me:
from django.db import models
class IntegerRangeField(models.IntegerField):
def...
Difference between wait() and sleep()
...call sleep on Thread.
Yet another point is that you can get spurious wakeups from wait (i.e. the thread which is waiting resumes for no apparent reason). You should always wait whilst spinning on some condition as follows:
synchronized {
while (!condition) { mon.wait(); }
}
...
How can I get the list of files in a directory using C or C++?
...around dirent (POSIX) and FindFirstFile (Windows) , while dirent.h just wraps dirent for windows. I think it is a personal taste, but dirent.h feels more as a standard
– Peter Parker
May 20 '13 at 19:13
...
CMFCTabCtrl的使用、颜色样式调整 - C/C++ - 清泛网 - 专注C/C++及内核技术
CMFCTabCtrl的使用、颜色样式调整CMFCTabCtrl使用，添加Tab、设置Tab样式，AutoColor自动设置Tab颜色效果等。1.在指定位置处创建一个CMFCTabCtrl，并给其添加4个CEdit:
CRect rectTab;
CEdit m_wnd1;
CEdit m_wnd2;
CEdit m_wnd3;
CEdit m_wnd4;
CMFCTabCtrl m_wn...
When should I use Write-Error vs. Throw? Terminating vs. non-terminating errors
...on-recoverable situations and by expressions in which a .NET exception / a PS runtime error occurs; only the statement is terminated, and script execution continues by default.
script-terminating errors (more accurately: runspace-terminating), as either triggered by Throw or by escalating one of the...
How to autosize a textarea using Prototype?
.../Initial on load
</script>
</body>
</html>
PS: Obviously this JavaScript code is very naive and not well tested, and you probably don't want to use it on textboxes with novels in them, but you get the general idea.
...
Media Queries: How to target desktop, tablet, and mobile?
...d) */ }
@media (min-width:801px) { /* tablet, landscape iPad, lo-res laptops ands desktops */ }
@media (min-width:1025px) { /* big landscape tablets, laptops, and desktops */ }
@media (min-width:1281px) { /* hi-res laptops and desktops */ }
Edit: Refined to work better with 960 grids:
@media (min-...
App Inventor 2 Encrypt.Security 安全性扩展：MD5哈希，SHA1和SHA256哈希...
...ypt.Security 安全性扩展
这是关于App Inventor和Thunkable安全性的扩展，它提供MD5哈希，SHA1和SHA256哈希，AES加密/解密，RSA加密/解密，BASE64编码/解码方法。
权限
此扩展程序不需要任何权限。
事件
OnErrorOccured
抛出任何异常时将触...
C++ 读写xml方法整理（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
C++ 读写xml方法整理（持续更新）c++读写xml的方法可谓是五花八门，太多了，这里对常用的几种做一个总结，附demo。1、Markup 下载：
特点：C++编写的，一个.h，一个.cpp，绿色小巧，直接加入工程源码编译，只支持MFC。
<?xml versi...