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UICollectionView current visible cell index
... especially well when each item in your collection view takes up the whole screen.
Swift version
let visibleRect = CGRect(origin: collectionView.contentOffset, size: collectionView.bounds.size)
let visiblePoint = CGPoint(x: visibleRect.midX, y: visibleRect.midY)
let visibleIndexPath = collect...
How to change the output color of echo in Linux
...it standout mode
Cursor movement commands
tput cup Y X # Move cursor to screen postion X,Y (top left is 0,0)
tput cuf N # Move N characters forward (right)
tput cub N # Move N characters back (left)
tput cuu N # Move N lines up
tput ll # Move to last line, first column (if no cup)
tput...
Percentage Height HTML 5/CSS
...
Although not working for portrait screen orientation stackoverflow.com/questions/23198237/…
– Dchris
Apr 21 '14 at 13:18
1
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GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
...定列一列
//设置控件的固定行或者固定列不能被选中（默认就是固定的不能被选）
m_Grid.SetFixedColumnSelection(FALSE);
m_Grid.SetFixedRowSelection(FALSE);
//设置控件是否允许隐藏行或者列
m_Grid.EnableColumnHide(FALSE);
m_Grid.EnableRowHide(FALSE);
...
Bootstrap 3 breakpoints and media queries
...obile First Method ==========*/
/* Custom, iPhone Retina */
@media only screen and (min-width : 320px) {
}
/* Extra Small Devices, Phones */
@media only screen and (min-width : 480px) {
}
/* Small Devices, Tablets */
@media only screen and (min-width : 768px) {
}
/* Medium Devices, Desktop...
Save Screen (program) output to a file
I need to save the whole output of Screen to a file to check later all the content.
11 Answers
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TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...是所谓的MSS（Max Segment Size）注意，TCP的RFC定义这个MSS的默认值是536，这是因为 RFC 791里说了任何一个IP设备都得最少接收576尺寸的大小（实际上来说576是拨号的网络的MTU，而576减去IP头的20个字节就是536）。
如果你的网络包可以...
Read only file system on Android
...adb
as a normal user:
adb shell
su
Grant root permissions on touch screen
mount
list all mount points that we have and we can see, in my case, that /dev/stl12 was mounted on /system as ro (ready only), so we just need do:
mount -o rw,remount /dev/stl12 /system
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对外网用户的squid代理+认证 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...e
代理软件：
Squid2.6STABLE16
外网卡：em0 -> 218.90.159.xxx （默认网关为上一级ISP提供）
内网卡：em1 -> 192.168.21.254
1、FreeBSD的安装及优化
（1）最小化安装FreeBSD6.2RELEASE
（2）配置rc.conf
hostname="one.www.com"
defaultrouter="218.90.159.xxx"
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How to take a screenshot programmatically on iOS
I want a screenshot of the image on the screen saved into the saved photo library.
20 Answers
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