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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 am using UISearchController to present a search bar inside the header view of a tableview: ... self . searchController . hidesNavigationBarDuringPresentation = NO ; self . presentingTVC . tableView . tableHeaderView = self . searchController . searchBar ; [ self . searchController . searchBar sizeToFit ]; self . presentingTVC . tableView . tableHeaderView = self . searchController . searchBar ; (where setting the tableHeaderView property twice is necessary as otherwise the header view overlaps the first row, c.f. a couple of answers on S.O

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 have been using Perl for some time, but today I came across this code: sub function1($$) { //snip } What does this mean in Perl? 回答1: It is a function with a prototype that takes two scalar arguments. There are strong arguments for not actually using Perl prototypes in general - as noted in the comments below. The strongest argument is probably: Far More Than Everything You've Ever Wanted to Know about Prototypes in Perl There's a discussion on StackOverflow from 2008: SO 297034 There's a possible replacement in the MooseX::Method:

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 have a piece of C code that calls a function defined in assembly. By way of example, let's say foo.c contains: int bar(int x); /* returns 2x */ int main(int argc, char *argv[]) { return bar(7); } And bar.s contains the implementation of bar() in x86 assembly: .global bar bar: movl 4(%esp), %eax addl %eax, %eax ret On Linux I can easily compile and link these sources with GCC as follows: % gcc -o test foo.c bar.s % ./test; echo $? 14 On Windows with MinGW this fails with an error of "undefined reference to `bar'". It turns out the cause for

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 am developing an application using the iOS SDK. I need to know what Default splash screen sizes I need. 回答1: 2018 Update - Please don't use this info ! I'm leaving the below post for reference purposes. Please read Apple's documentation Human Interface Guidelines - Launch Screens for details on launch screens and recommendations. Thanks Drekka July 2012 - As this reply is rather old, but stills seems popular. I've written a blog post based on Apple's doco and placed it on my blog . I hope you guys find it useful. Yes. In iPhone/iPad

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 have some containers and their children are only absolute / relatively positioned. How to set containers height so their children will be inside of them? Here's the code: HTML <section id="foo"> <header>Foo</header> <article> <div class="one"></div> <div class="two"></div> </article> </section> <div style="clear:both">Clear won't do.</div> <!-- I want to have a gap between sections here --> <section id="bar"> <header>bar</header> <article> <div class="one"></div><div></div> <div class="two"></div> </article> </section> CSS article {

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: I want to do something like this, so npm install also installs the package.json of ../somelocallib or more importantly its dependencies. "dependencies" : { "express" : "*" , "../somelocallib" : "*" } 回答1: 2014-Sep update This feature was implemented in the version 2.0.0 of npm. Example: { "name" : "baz" , "dependencies" : { "bar" : "file:../foo/bar" } } Any of the following paths are also valid: ../ foo / bar ~ /foo/ bar ./ foo / bar / foo / bar The local package will be copied to the prefix ( ./node-modules ). Old answer Put

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 want to update a large number of C++ source files with an extra include directive before any existing #includes. For this sort of task I normally use a small bash script with sed to re-write the file. How do I get sed to replace just the first occurrence of a string in a file rather than replacing the every occurrence? If I use sed s/#include/#include "newfile.h"\n#include/ it replaces all #includes. Alternative suggestions to achieve the same thing are also welcome. 回答1: # sed script to change "foo" to "bar" only on the first occurrence 1

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 have many rows in a database that contains xml and I'm trying to write a Python script that will go through those rows and count how many instances of a particular node attribute show up. For instance, my tree looks like: <foo> <bar> <type foobar="1"/> <type foobar="2"/> </bar> </foo> How can I access the attributes 1 and 2 in the XML using Python? 回答1: I suggest ElementTree . There are other compatible implementations of the same API, such as lxml , and cElementTree in the Python standard library itself; but, in this context, what they

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've got an array: myArray = [{'id':'73','foo':'bar'},{'id':'45','foo':'bar'}, etc.] I'm unable to change the structure of the array. I'm being passed an id of 45 , and I want to get 'bar' for that object in the array. How do I do this in JavaScript or using jQuery? 回答1: myArray.find(x => x.id === '45').foo; From MDN: The find() method returns a value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned. If you want to get an array of matching elements, use the filter() method

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: In my rails application I currently have a load of users who each have a registered user id. If I go in to my users index and click on a users show page I get the following example header. localhost:3000/users/3 Now I don't like this as it easily allows people to skip through users in the header. How would I go about doing the following so that it shows the user.username field instead e.g. localhost:3000/users/adamwest 回答1: You can define a to_param method on the User model. class User ... def to_param name end ... end Then every generated