什么是尾叫优化? - What Is Tail Call Optimization?

问题: Very simply, what is tail-call optimization? 很简单,什么是尾叫优化? More specifically, Can anyone show some small code snippets where it could be applied, and where not...

2020/06/30 21:12
查找项目是否在JavaScript数组中的最佳方法? [重复]

问题: This question already has an answer here: 这个问题已经在这里有了答案: How do I check if an array includes an object in JavaScript? 如何检查数组是否在JavaScript中包含对象...

2020/06/30 16:42
如何从Windows命令行获取应用程序退出代码? - How do I get the application exit code from a Windows command line?

问题: I am running a program and want to see what its return code is (since it returns different codes based on different errors). 我正在运行一个程序,想查看它的返回代码是什么(...

2020/06/30 13:42
获取字符串的长度 - Get the length of a String

问题: How do you get the length of a String ? 你如何得到一个String的长度? For example, I have a variable defined like: 例如,我有一个定义如下的变量: var test1: String = "Sco...

2020/06/30 07:42
如何将特定提交推送到远程,而不是之前的提交? - How can I push a specific commit to a remote, and not previous commits?

问题: I have made several commits on different files, but so far I would like to push to my remote repository only a specific commit. 我已经对不同的文件做了几次提交,但到目前为...

2020/06/30 02:41
使主体具有浏览器高度的100% - Make body have 100% of the browser height

问题: I want to make body have 100% of the browser height. 我想让主体具有浏览器高度的100%。 Can I do that using CSS? 我可以使用CSS吗? I tried setting height: 100% , but it do...

2020/06/29 23:41
div块内的CSS中心文本(水平和垂直) - CSS center text (horizontally and vertically) inside a div block

问题: I have a div set to display:block ( 90px height and width ), and I have some text inside. 我将div设置为display:block ( height和width 90px ),并且里面有一些文本。 I need...

2020/06/29 23:11
在Android Studio中自动导入所有内容的快捷方式是什么? - What is the shortcut to Auto import all in Android Studio?

问题: Is there any way of auto importing (like in Eclipse Shift + Ctrl + O ) in Android Studio? Android Studio中是否有任何自动导入方式(如Eclipse Shift + Ctrl + O )? I have f...

如何获取大熊猫DataFrame的行数? - How do I get the row count of a pandas DataFrame?

问题: I'm trying to get the number of rows of dataframe df with Pandas, and here is my code. 我正在尝试使用Pandas获取数据框df的行数,这是我的代码。 Method 1: 方法1: total_rows...

2020/06/29 11:40
一个函数应该只有一个return语句吗? - Should a function have only one return statement?

问题: Locked . 已锁定 。 This question and its answers are locked because the question is off-topic but has historical significance. 该问题及其答案被锁定,因为该问题是题外话,但...

2020/06/29 05:10
如何在批处理/ cmd中“注释掉”(添加注释)? - How to “comment-out” (add comment) in a batch/cmd?

问题: I have a batch file that runs several python scripts that do table modifications. 我有一个批处理文件,它运行几个进行表修改的python脚本。 I want to have users comment out...

2020/06/28 23:40
从AngularJS控制器将HTML插入视图 - Insert HTML into view from AngularJS controller

问题: Is it possible to create an HTML fragment in an AngularJS controller and have this HTML shown in the view? 是否可以在AngularJS控制器中创建HTML片段并将该HTML显示在视图中?...

2020/06/28 19:39
HTML文本输入仅允许数字输入 - HTML text input allow only numeric input

问题: 有没有一种快速的方法来将HTML文本输入( <input type=text /> )设置为仅允许数字键击(加'。')? 解决方案: 参考一:https://stackoom.com/question/1y6H/HTML文本输入仅允许数字...

2020/06/28 13:09
如何将道具传递给{this.props.children} - How to pass props to {this.props.children}

问题: I'm trying to find the proper way to define some components which could be used in a generic way: 我试图找到定义可以以一般方式使用的某些组件的正确方法: <Parent> <Child ...

为什么2 *(i * i)比Java中的2 * i * i更快? - Why is 2 * (i * i) faster than 2 * i * i in Java?

问题: The following Java program takes on average between 0.50 secs and 0.55 secs to run: 以下Java程序平均需要在0.50秒到0.55秒之间运行: public static void main(String[] args)...

2020/06/28 06:39
重命名本地和远程Git存储库的master分支 - Rename master branch for both local and remote Git repositories

问题: I have the branch master which tracks the remote branch origin/master . 我有分支master追踪远程分支origin/master 。 I want to rename them to master-old both locally and o...

2020/06/28 03:08
LINQ的Java等效项是什么? [关闭] - What is the Java equivalent for LINQ? [closed]

问题: LINQ的Java等效项是什么? 解决方案: 参考一:https://stackoom.com/question/56ei/LINQ的Java等效项是什么-关闭 参考二:https://oldbug.net/q/56ei/What-is-the-Java-equivalent-f...

2020/06/27 20:38

问题: I have a page where some event listeners are attached to input boxes and select boxes. 我有一个页面,其中一些事件侦听器附加到输入框和选择框。 Is there a way to find out w...

按名称删除数据框列 - Drop data frame columns by name

问题: I have a number of columns that I would like to remove from a data frame. 我想从数据框中删除许多列。 I know that we can delete them individually using something like: 我知...

2020/06/27 18:38
如何还原已经推送到远程分支的合并提交? - How to revert a merge commit that's already pushed to remote branch?

问题: git revert <commit_hash> alone won't work. 单独使用git revert <commit_hash>无效。 -m must be specified, and I'm pretty confused about it. -m必须被指定,对此我感到很困惑。...

2020/06/27 16:08