children

In perl, killing child and its children when child was created using open

由 这一生的挚爱 提交于 2019-11-27 06:13:47
问题 Here's my code, with error handling and other stuff removed for clarity: sub launch_and_monitor { my ($script, $timeout) = @_; sub REAPER { while ((my $child = waitpid(-1, &WNOHANG)) > 0) {} $SIG{CHLD} = \&REAPER; } $SIG{CHLD} = \&REAPER; my $pid = fork; if (defined $pid) { if ($pid == 0) { # in child monitor($timeout); } else { launch($script); } } } The launch sub executes a shell script which in turn launches other processes, like so: sub launch($) { my ($script) = @_; my $pid = open(PIPE,

jquery if div id has children

由 纵然是瞬间 提交于 2019-11-27 04:09:05
问题 This if -condition is what's giving me trouble: if (div id=myfav has children) { do something } else { do something else } I tried all the following: if ( $('#myfav:hasChildren') ) { do something } if ( $('#myfav').children() ) { do something } if ( $('#myfav:empty') ) { do something } if ( $('#myfav:not(:has(*))') ) { do something } 回答1: if ( $('#myfav').children().length > 0 ) { // do something } This should work. The children() function returns a JQuery object that contains the children.

css all divs vs direct child divs

由 坚强是说给别人听的谎言 提交于 2019-11-27 03:43:26
问题 I have this structure: <div class="Root"> <div>ddddddd</div> <div> <div>pppppppppp</div> <div>pppppppppp</div> </div> <div>ddddddd</div> <div> I want to put borders on the div s that contain ddddddd , and I want to set the text color on all div s to green. There are two rules: I can't add class attributes. I have to write selectors that start with .Root . Any ideas? 回答1: Actually I was searching this: Selects the divs that are direct children of Root: .Root > div { border: 1px solid red; }

使用vue+element创建三级导航

由 ⅰ亾dé卋堺 提交于 2019-11-27 02:35:52
废话不多说 直接上代码 HTML < template > < div > < el - menu class = "el-menu-demo" mode = "vertical" @select = "handleSelect" @click = 'enter()' @mouseout = 'leave' : unique - opened = 'true' > < div v - for = "(firstItem,firstIndex) in list" : key = "'first'+firstIndex" > < ! -- el - submenu 为菜单列表，含有箭头，在children . length大于 0 的时候使用 -- > < el - submenu : index = "firstItem.path" v - if = "firstItem.children&&firstItem.children.length!==0" > < template slot = "title" > < i : class = "firstItem.icon" > < / i > < span > { { firstItem . name } } < / span > < / template > < div v - for = "(secondItem

Prevent duplicate MDI children forms

由 别来无恙 提交于 2019-11-27 02:23:18
问题 Is there a way to prevent the opening of a certain form within an MDI container if that said form is already opened? 回答1: You can interate over the OpenForms collection to check if there is already a form of the given type: foreach (Form form in Application.OpenForms) { if (form.GetType() == typeof(MyFormType)) { form.Activate(); return; } } Form newForm = new MyFormType(); newForm.MdiParent = this; newForm.Show(); 回答2: AFAIK there is no standard way. You'll have to implement it yourself. I'd

jQuery Find and List all LI elements within a UL within a specific DIV

由 穿精又带淫゛_ 提交于 2019-11-27 01:47:23
问题 I have 3 Columns of ULs each a Dynamic UL container that can have anywhere from 0-9 LI containers (eventually more). All my LI elements have an attribute "rel" which I am trying to ultimately find that attribute and use it for something else on all LI elements within that parent DIV. I do eventually want to find more based on each but for not the very least the rel.. Any Ideas how I can achieve that with jQuery? Example: <ul id="column1"> <li rel="1">Info</li> <li rel="2">Info</li> <li rel="3

Disable home button in android toddler app?

由 橙三吉。 提交于 2019-11-27 01:04:33
I've developed and app that is a slide show of pictures which each play a sound when you tap them. It's like a picture book for ages 2-4. The problem is, since android won't let you capture a home button press and essentially disable it, when parents give the phone to their child to play with unattended (brave parent), the child can inadvertenly exit the app and then make calls or otherwise tweak the phone. There are two other apps that currently have a psuedo fix for this issue. The apps are Toddler Lock and ToddlePhone. I've tried contacting the developers of these apps for some guidance but

Styling nested elements in WPF

由 邮差的信 提交于 2019-11-27 00:05:36
问题 Suppose you have a nested element structure, for example a ContextMenu with MenuItems: <ContextMenu Style="{StaticResource FooMenuStyle}"> <MenuItem Style="{StaticResource FooMenuItemStyle}"/> ... </ContextMenu> You can easily apply styles or templates to the ContextMenu or MenuItem elements. But if the MenuItem style belongs to the Menu style it is quite cumbersome and redundant to add it to every MenuItem element. Is there any way to apply those automatically to child elements? So that you

How to select first child with jQuery?

由 冷暖自知 提交于 2019-11-26 22:07:08
How do I select the first div in these divs (the one with id=div1 ) using first child selectors? <div class="alldivs"> <div class="onediv" id="div1"> </div> <div class="onediv" id="div2"> </div> <div class="onediv" id="div3"> </div> </div> Try with: $('.onediv').eq(0) demo jsBin From the demo: Other examples of selectors and methods targeting the first LI unside an UL : .eq() Method: $('li').eq(0) :eq() selector: $('li:eq(0)') .first() Method $('li').first() :first selector: $('li:first') :first-child selector: $('li:first-child') :lt() selector: $('li:lt(1)') :nth-child() selector: $('li:nth

Get ListView children that are not in view

由 那年仲夏 提交于 2019-11-26 20:24:38
问题 For an App I am working on, I'm trying to get the children of a ListView. To do this I have the following piece of code: View listItem = mListView.getChildAt(i); However, this only works for children that are in view. I need to also reach the children that are not in view. How would I do this? EDIT: Comparing the suggested methods to the one I was already using I find the following: RelativeLayout listItem1 = (RelativeLayout) mListView.getAdapter().getView(i, null, mListView); RelativeLayout
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