overflow | 易学教程

Why is overflow interacting with z-index?

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I am trying to understand the rules behind z-index and how it interacts with the overflow property. I have this html: <body> <div class="cell"> Here is some text to keep things interesting <div class="boxy"></div> </div> </body> And this css: .boxy { position: absolute; z-index: 9999; top:70px; width: 50px; height: 50px; background: #0FF; } .cell { border: 2px solid #F00; position: relative; /* comment these two lines out and the box appears */ /* or change them both to 'visible' */ /* changing only one of them to 'visible' does not work */ overflow-y: auto; overflow-x: auto; } I would have

Is this vulnerable to a stack overflow?

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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由翻译强力驱动问题: void gctinp ( char * inp , int siz ) { puts ( "Input value: " ); fgets ( inp , siz , stdin ); printf ( "buffer3 getinp read %s" , inp ); } From what I've read, fgets is supposed to be used when you want to limit the size of input. So this code shouldn't be vulnerable right? It is being called like so: int main ( int argc , char * argv []) { char buf [ 16 ]; getinp ( buf , sizeof ( buf )); display ( buf ); printf ( "buffer3 done\n" ); } Thanks for your time. 回答1: You won't strike buffer overflow problems if you enter more characters

What is the function of “overlay” value of “overflow” property? [duplicate]

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This question already has an answer here: Overflow: overlay doesn't work in firefox 2 answers I am unable to understand the difference between "overlay" & "auto". Does "overlay" does the same work as "auto"? The only difference is that overflow: overlay is only supported by -Webkit browsers, is non-standardized, and allows the content to extend beneath the scrollbar - whereas overflow: auto will not allow the content to extend beneath the scrollbar, if it appears it'll occupy the space required and shift the content accordingly (either vertically or horizontally). p { display: inline-block;

CSS max-height and overflow auto always displays vertical scroll

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问题 I have a div class set up with the following CSS style: div.multiple_choice{ border: 1px solid black; max-width: 300px; max-height: 200px; overflow: auto; } The problem is, when the text inside doesn't force the DIV to reach the maximum height of 200px, the vertical scroll bar still shows up. I can click on the up and down arrows but it only moves the contents up and down by about a pixel or two. This is occuring in Google Chrome (version 18.0) and Iceweasel 11. 回答1: As it turns out, another

VB6 overflow error with large integers

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I am trying to set an integer value as such: Dim intID as integer intID = x * 10000 This works ok when x is 3 or less. But when x is 4, this gives me the error: run-time error 6 Overflow I don't understand why this is. I can set intID to 40000 directly without any problems, so it's obviously capable of storing large numbers. Alex K. You *cannot set a vb6 integer to 40000 as they are signed 16 bit numbers so +32767 is the maximum. Long is the 32 bit type. However as a caveat, if you were to: Dim lngID As Long lngID = 4 * 10000 You would still get an overflow as literal numbers default to

How to change Menu Item text Color of holo theme in Android?

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问题 I am using Theme.Holo in my app. I have customized my theme using following Style.xml <style name="CustomActivityTheme" parent="@android:style/Theme.Holo"> <item name="android:actionBarStyle">@style/CustomActivityTheme.ActionBar</item> <item name="android:actionMenuTextColor">#000000</item> <item name="android:divider">@drawable/action_bar_div</item> <item name="android:actionOverflowButtonStyle">@style/MyActionButtonOverflow</item> <item name="android:popupMenuStyle">@style/MyPopupMenu</item

Does INT_MIN % -1 produce undefined behavior?

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gcc generates floating code that raises SIGFPE for the following code: #include <limits.h> int x = -1; int main() { return INT_MIN % x; } However I can find no statement in the standard that this code invokes undefined or implementation-defined behavior. As far as I can tell, it's required to return 0. Is this a bug in gcc or am I missing some special exception the standard makes? Jens Gustedt You are probably right that this can be considered as a bug in the actual standard. The current draft addresses this problem: If the quotient a/b is representable, the expression (a/b)*b + a%b shall

Add dots/ellipsis on div/span element overflow without using jquery

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问题 Need to implement functionality similar to what dotdotdot jQuery plugin does but cannot use javascript frameworks (like jquery or ext). Is there any easy way to add the dots to the content of div or span element if content takes more space then element should??? (similar to what css overflow: ellipsis setting does) Can't use ellipsis beacause it doesn't work with many lines when height is limited. Thank you :) 回答1: Why not using the CSS property text-overflow? It works great as long as you

C/C++ unsigned integer overflow

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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: i'm reading an article about integer security . here's the link: http://ptgmedia.pearsoncmg.com/images/0321335724/samplechapter/seacord_ch05.pdf In page 166,there is said: What does it mean? appreciate for reply. 回答1: It means the value "wraps around". UINT_MAX + 1 == 0 UINT_MAX + 2 == 1 UINT_MAX + 3 == 2 .. and so on As the link says, this is like the modulo operator: http://en.wikipedia.org/wiki/Modulo_operation 回答2: It means that you can't alter the sign of a unsigned calculation, but it can still produce unexpected results. Say we have

How to hide extra overflow part of this angled css ribbon?

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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How to hide extra part of this angled css ribbon? Fork this jsfiddle to play http://jsfiddle.net/PjnmQ/ 回答1: I modified you code and added a overflow: hidden to the box http://jsfiddle.net/aNmvc/4/ 文章来源: How to hide extra overflow part of this angled css ribbon?