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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've been trying to find a solution for this requirement but I've hit many dead ends. I'm using Cloudant as my data store of user documents. Each user document has a field (property) called 'items', which is an array of objects. So a user document looks like this: { "_id":"userid1", "_rev":"XX", "username": "foobaruser" "items": [ { "date":1357879144069, "text":"don't cry because it's over, smile because it happened.", "cat":"determination" }, { "date":1357879179209, "text":"those who mind don't matter, and those who matter don't mind.",

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: For my WC product pages, I need to add a class to the body tag so that I can perform some custom styling. Here's the function I'm creating for this... function my_add_woo_cat_class($classes) { $wooCatIdForThisProduct = "?????"; //help! // add 'class-name' to the $classes array $classes[] = 'my-woo-cat-id-' . $wooCatIdForThisProduct; // return the $classes array return $classes; } //If we're showing a WC product page if (is_product()) { // Add specific CSS class by filter add_filter('body_class','my_add_woo_cat_class'); } ...but how do I get

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: So far I've been able to find how to add a line at the beginning of a file but that's not exactly what I want. I'll show it on a example File content some text at the beginning Result some text at the beginning It's similar but I don't want to create any new line with it... I would like to do this with sed if possible. 回答1: sed can operate on an address: $ sed -i '1s/^/ /' file What is this magical 1s you see on every answer here? Line addressing! . Want to add on the first 10 lines? $ sed -i '1,10s/^/ /' file Or you can use Command Grouping

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: Consider the following code: trait Animal { fn make_sound(&self) -> String; } struct Cat; impl Animal for Cat { fn make_sound(&self) -> String { "meow".to_string() } } struct Dog; impl Animal for Dog { fn make_sound(&self) -> String { "woof".to_string() } } fn main () { let dog: Dog = Dog; let cat: Cat = Cat; let v: Vec<Animal> = Vec::new(); v.push(cat); v.push(dog); for animal in v.iter() { println!("{}", animal.make_sound()); } } The compiler tells me that v is a vector of Animal when I try to push cat (type mismatch) So, how can I make a

1. cron 后台常驻程序 (daemon) 用于： A. 负责文件在网络中的共享 B. 管理打印子系统 C. 跟踪管理系统信息和错误 D. 管理系统日常任务的调度 2. 在大多数Linux发行版本中，以下哪个属于块设备 (block devices) ？ A. 串行口 B. 硬盘 C. 虚拟终端 D. 打印机 3. 下面哪个Linux命令可以一次显示一页内容？ A. pause B. cat C. more D. grep 4. 怎样了解您在当前目录下还有多大空间？ A. Use df B. Use du / C. Use du . D. Use df . 5. 怎样更改一个文件的权限设置？ A. attrib B. chmod C. change D. file 6. 假如您需要找出 /etc/my.conf 文件属于哪个包 (package) ，您可以执行： A. rpm -q /etc/my.conf B. rpm -requires /etc/my.conf C. rpm -qf /etc/my.conf D. rpm -q | grep /etc/my.conf 7. 假如当前系统是在 level 3 运行，怎样不重启系统就可转换到 level 5 运行？ A. Set level = 5 B. telinit 5 C. run 5 D. ALT-F7-5 8.

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 encode 3 categorical features out of 10 features in my datasets. I use preprocessing from sklearn.preprocessing to do so as the following: from sklearn import preprocessing cat_features = [ 'color' , 'director_name' , 'actor_2_name' ] enc = preprocessing . OneHotEncoder ( categorical_features = cat_features ) enc . fit ( dataset . values ) However, I couldn't proceed as I am getting this error: array = np . array ( array , dtype = dtype , order = order , copy = copy ) ValueError : could not convert string to float : PG I

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: Is there a way to write a script that will copy files from an ADB shell using run-as? The only way I know of to copy in the adb shell is using cat source > dest (edit: modern android versions have the cp command, which makes this question unnecessary), but I am only able to quote the greater-than sign one level deep - so my script can pass it to adb shell, but not to adb shell run-as. For example, this works: adb shell "cat source > dest" But this does not: adb shell run-as "cat source > dest" Nor this: adb shell "run-as cat source \> dest"

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 an i18n problem in django: This works fine : {% trans cat.name %} cat.name will be translated But this doesn't work: {% blocktrans with cat.name|slugify as cat_slug %}{{ cat_slug }}{% endblocktrans %} cat.name is not translated If I change the filter : {% blocktrans with cat.name|capfirst as cat_slug %}{{ cat_slug }}{% endblocktrans %} I can see that the filter is working, but there is no translation... 回答1: I'm only just getting started with Django internationalization, but I think you're misunderstanding how the {% blocktrans %} tag

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: This is very odd to me. RuntimeException inherits from Exception , which inherits from Throwable . catch(Exception exc) { /* won't catch RuntimeException */ but catch(Throwable exc) { /* will catch RuntimeException */ I know RuntimeException is special in that it's unchecked. But to my understanding that applies just to whether exceptions have to be declared, not whether they are caught. And even then, I don't know why this logic would break on catching Throwable. This is pretty relevant to me since I have a situation where RuntimeExceptions