What

What command means "do nothing" in a conditional in Bash?

有时在制作条件时我需要代码什么都不做例如在这里我希望bash在 a大于 10 如果 a小于 5 否则打印 2 code if a ge 10 then elif a le 5 then echo 1 else echo 2 fi c

What command means quot nothing

What is the 'new' keyword in JavaScript?

这newJavaScript中的关键字在第一次遇到时可能会令人困惑因为人们倾向于认为JavaScript不是面向对象的编程语言 What is it What problems does it solve When is it appro

What The New keyword javascript

What does "use strict" do in JavaScript, and what is the reasoning behind it?

最近我通过Crockford的JSlint运行了一些JavaScript代码它给出了以下错误 p Problem at line 1 character 1 Missing quot use strict quot statement

What does quot Use strict

What's the difference between Html.Label, Html.LabelFor and Html.LabelForModel

有什么区别 Html Label Html LabelFor 和 Html LabelForModel 方法 Html Label为您提供一个匹配指定输入文本的输入的标签更具体地说对于匹配字符串表达式的模型属性 code Model p

What The difference Between html

What is the correct way of using C++11's range-based for?

使用C 11的基于范围的正确方法是什么for 应该使用什么语法 for auto elem container 或者for auto amp elem container 或者for const auto amp elem containe

What The correct way Using

What's the canonical way to check for type in Python?

如何检查对象是给定类型的还是它是从给定类型继承的我该如何检查对象是否o是类型str Beginners often wrongly expect the string to already be quot a number quot e

What The canonical way check

What is the purpose and function of Xcode's source control "Show Remote Status" menu option?

在XCode在GIT源控制下的项目中工作时我注意到以下菜单项 code File gt Source Control gt Show Remote Status code 而且在切换时它会更改为 code File gt Source

What The Purpose and function

What is "vectorization"?

现在几次我在Matlab的Matlab Fortran 其他一些但是我从未找到解释是什么意思它的作用是什么因此我在这里问矢量化是什么例如循环已被矢量化是什么意思 Many CPUs have quot vector quo

What quot vectorization

What regex will match every character except comma ',' or semi-colon ';'?

是否可以定义一个正则表达式该正则与某个定义字符或一组字符之外的每个字符匹配基本上我想通过逗号或半彩色拆分字符串因此我一直在考虑用正则表达式进行操作该正则可以匹配所有内容直到遇到逗号或半彩色为止 code code 您尚未指

What regex will match every

What does "=>" mean in PHP?

什么是 gt 操作员在以下代码中的意思是 code foreach user list as user gt pass code 该代码是php net上的评论用户未指定 user list user或者 pass 我通常会看到 gt 平

What does quot mean php

What's the difference between .so, .la and .a library files?

我知道 so文件是一种动态库很多线程都可以共享此类库因此在内存中无需一个以上的副本但是有什么区别 a和 la 这些都是静态库吗如果动态液体比静态液体具有很大的优势为什么仍然有很多静态库我什么时候应该尝试将代码构建到 so或者 a

What The difference Between and

What are the differences between open source BPM tools (such as Activiti, bonita) & Windows Workflow Foundation

我试图找到基于ASP NET的免费开源BPM工具但不幸的是我找不到这样的工具但是最近我读了一篇有关Windows Workflow基金会的文章因此它提供了类似于开源BPM工具的功能例如Activiti Bonita Joget等或

What are The Differences Between

What does "===" mean? [duplicate]

This question already has answers here 我注意到有人在使用PHP操作员我没有意义我已经尝试了一个功能它以疯狂的方式对应该操作员的定义是什么我什至无法在PHP运营商的声明中找到它

What does quot mean duplicate

What does Ruby have that Python doesn't, and vice versa?

Locked This question and its answers are locked because the question is off topic but has historical significance It is

What does ruby have that

What's "wrong" with C++ wchar_t and wstrings? What are some alternatives to wide characters?

我在C 社区中看到很多人尤其是FreeNode上的 C wstrings和wchar t 以及它们在Windows API中的使用什么是错误 wchar t和wstring 如果我想支持国际化那么宽阔角色的一些选择是什么 What

What quot wrong with wchar

What's the difference between OpenID and OAuth?

我真的在试图了解OpenID和Oauth之间的区别吗也许它们是两个完全独立的事情 OpenID是关于身份验证的即证明您是谁 OAUTH是关于授权的即不必处理原始身份验证就可以授予对功能数据等的访问权限 OAuth可以在外部合作

What The difference Between openid

What are the PHP operators "?" and ":" called and what do they do?

什么是和 PHP的运营商例如 code request type SSL HTTPS SERVER HTTP SERVER code 这是有条件的操作员 code x y z code 意思是如果 x是真的然后使用 y 否则使用 z

What are The php operators

what's the point of std::unique_ptr::get

没有std unique ptr get首先击败拥有唯一的 ptr的目的我本来希望此功能会改变其状态因此它不再具有指针 std simelo ptr 获取有用的实际用途吗 std unique ptr安全地提供独特的所有权语义但是这

What The Point std unique

What's the quickest validation query from a jdbc-pool to a specific table in SQL Server 2008

我通常使用SELECT 1作为我从Tomcat JDBC池中首选的验证 Query 因为它仅返回一排结果1的速度更快但是今天我发现了一个可怕的错误我的数据库只有一个带有其主键的表并且不可自然该表有时会丢弃然后通过应用程序再次出现

What The quickest validation query

what's the best way to use application constants in spring xml configuration?

我想在Spring XML配置中使用我的应用程序常数我知道与这样的春季spel这样做 code lt bean class example SomeBean gt lt property name anyProperty value T

What The best way Use