转自:https://www.linuxjournal.com/content/return-values-bash-functions Bash functions, unlike functions in most programming languages do not allow you to return a value to the caller. When a bash function ends its return value is its status: zero for s…

A C++ program can be made easier to read and maintain by using references rather than pointers. A C++ function can return a reference in a similar way as it returns a pointer. When a function returns a reference, it returns an implicit pointer to its…

Introduction Those who know don't talk. Those who talk don't know. Sometimes, PHP "as is" simply isn't enough. Although these cases are rare for the average user, professional applications will soon lead PHP to the edge of its capabilities, in t…

Returning multiple values from a function is a common idiom in Go, most often used for returning values along with potential errors. We'll go over how to return multiple values from a function and use those values in our program. // You can edit this…

n this lesson, we'll go over how bash functions work. Bash functions work like mini bash scripts--you can pass parameters and invoke them just like a bash command. You can also define local variables within a bash function using the local keyword. Lo…

目录 在R中编写函数 args(函数名) 创建一个函数的步骤 1.default args Passing arguments between functions Checking arguments 固定函数参数 Returning values from functions augments Environments 查看父类的环境变量 exists 局部变量和全局变量 这个解释可以参考之前的python学习笔记python 函数学习笔记 单位换算 单位换算有可以直接用的函数 inner_j…

The immediate function pattern is a syntax that enables you to execute a function as soon as it is defined. (function () { alert('watch out!'); }());  • You define a function using a function expression. (A function declaration won’t work.) • You add…

In bash shell, when you use a dollar sign followed by a variable name, shell expands the variable with its value. This feature of shell is called parameter expansion. But parameter expansion has numerous other forms which allow you to expand a parame…

Bash Reference Manual a.summary-letter { text-decoration: none } blockquote.indentedblock { margin-right: 0 } blockquote.smallindentedblock { margin-right: 0; font-size: smaller } blockquote.smallquotation { font-size: smaller } div.display { margin-…

NSDecimalNumber 翻译补充自:http://rypress.com/tutorials/objective-c/data-types/nsdecimalnumber 感谢乐于分享的大神 在iOS开发中,和货币价格计算相关的,需要注意计算精度的问题.即使只是两位小数,也会出现误差.使用float类型运算,是完全不够的.所以我在网上来找寻答案,但是在百度找了好久,没有发现一个好的解决方案,后来发现了NSDecimalNumber这个类,但是国内搜索引擎上的资料用太少了,所以自己通过找资…