definition

What is a Shim?

你说的曾经没有我的故事 提交于 2019-11-29 18:55:48
What's the definition of a Shim? From Wikipedia: In computer programming, a shim is a small library that transparently intercepts an API, changing the parameters passed, handling the operation itself, or redirecting the operation elsewhere. Shims typically come about when the behaviour of an API changes, thereby causing compatibility issues for older applications that still rely on the older functionality. In these cases, the older API can still be supported by a thin compatibility layer on top of the newer code. Shims can also be used to run programs on different software platforms than they

How can I find the operator definition in Swift?

纵饮孤独 提交于 2019-11-29 18:44:42
I write code below: let array1: [Int] = [0,1] let array2 = array1 + [2] It just works.I want to find where + operator define. I search ArrayExtension in my workspace without result.I search Apple doc Collection Sequence Array , there is no result. Is there a way to navigate to operator definition ,like CMD + CTRL + J for func You can select the operator in the Xcode source editor, and choose "Navigate -> Jump to definition" from the menu, or press CMD+CTRL+J. (This was broken in Xcode 10, but works again in Xcode 11, which is currently in beta.) 来源: https://stackoverflow.com/questions/53651936

Explanation of BASE terminology

我只是一个虾纸丫 提交于 2019-11-29 18:36:10
The BASE acronym is used to describe the properties of certain databases, usually NoSQL databases. It's often referred to as the opposite of ACID . There are only few articles that touch upon the details of BASE, whereas ACID has plenty of articles that elaborate on each of the atomicity, consistency, isolation and durability properties. Wikipedia only devotes a few lines to the term. This leaves me with some questions about the definition : B asically A vailable, S oft state, E ventual consistency I have interpreted these properties as follows, using this article and my imagination: Basically

“Multiple definition”, “first defined here” errors

拈花ヽ惹草 提交于 2019-11-29 17:14:38
问题 I have 3 projects: Server , Client and Commons . Making header & source pairs in Commons doesn't cause any problems and I can access the functions freely from both Server and Client . However, for some reason making additional source/header files within Server or Client project always causes multiple definition of (...) and first defined here errors. Example: commands.h (in root dir of the Client project) #ifndef COMMANDS_H_ #define COMMANDS_H_ #include "commands.c" void f123(); #endif /*

Scheme: Changing the definition of complex numbers to accept vectors

孤街浪徒 提交于 2019-11-29 16:29:00
Basically what I am trying to do is change the definition of complex numbers so I can represent vectors in Scheme. I want to be able to write something like "i+j+k" without the quotes and not have the program go entirely crazy. I know complex numbers can be represented by something like "1+2i" so I was hoping a simple overwrite could accomplish this. I thought overwriting the complex? definition might work, but it seems to have no effect. I am unsure of where the code I need to affect even is. Any help would be amazing. Thanks. Are you aware that the Racket reader already supports complex

Why there is number two in J2EE name?

谁说胖子不能爱 提交于 2019-11-29 12:50:05
问题 As dicussed about the name here, I wonder why we have the number two 2 in the name J2EE? Was there J1EE or J0EE? 回答1: From Java Ranch Sun went through a name change a little bit ago. The first release of Java was called simply Java. Then the platform was updated and was called Java 2 and we got versions like: Java 2 version 1.3, 1.4... And you got the Standard Edition names looking like: J2SE 1.3, 1.4, ... The Enterprise Edition followed the same scheme: Java 2 Enterprise Edition version 1.2,

How to define threadsafe?

天涯浪子 提交于 2019-11-29 12:38:51
问题 Threadsafe is a term that is thrown around documentation, however there is seldom an explanation of what it means, especially in a language that is understandable to someone learning threading for the first time. So how do you explain Threadsafe code to someone new to threading? My ideas for options are the moment are: Do you use a list of what makes code thread safe vs. thread unsafe The book definition A useful metaphor 回答1: Eric Lippert says: When I'm asked " is this code thread safe ?" I

Neat way to define a long parameter vector in fortran

依然范特西╮ 提交于 2019-11-29 12:26:01
Well, I've this problem now. I've a (huge) set of parameters I'd like to organize in a vector. Of course, I can do something like: real, dimension(64) :: CONST CONST(1) = 2.4 CONST(2) = 1.4 ... CONST(n) = CONST(1)*CONST(14)**CONST(7) ... CONST(64) = ABS(CONST(18)) (Note that some of the constants are related to other constants). But in that case, I wouldn't have the parameter attribute in the variable, wich I'd like to have. The other option I can think about is using the attribute parameter , in which case I've to assign the value to the vector during the definition of the variable. Something

How to write function with variable from the outside?

早过忘川 提交于 2019-11-29 11:21:19
I hope you can help. I am looking for a way to write a function that inserts one item later. Let me show you an example: def general_poly(L): """ L, a list of numbers (n0, n1, n2, ... nk) Returns a function, which when applied to a value x, returns the value n0 * x^k + n1 * x^(k-1) + ... nk * x^0 """ x = 1 res = 0 n = len(L)-1 for e in range(len(L)): res += L[e]*x**n n -= 1 return res I thought I could just give x a value here and once I do general_poly(L)(10) it will be replaced so that x = 10 but apparently it is not that easy. What do I have to change / add so that my function works? How

What are the advantages and disadvantages of separating declaration and definition as in C++?

为君一笑 提交于 2019-11-29 09:54:13
In C++, declaration and definition of functions, variables and constants can be separated like so: function someFunc(); function someFunc() { //Implementation. } In fact, in the definition of classes, this is often the case. A class is usually declared with it's members in a .h file, and these are then defined in a corresponding .C file. What are the advantages & disadvantages of this approach? Historically this was to help the compiler. You had to give it the list of names before it used them - whether this was the actual usage, or a forward declaration (C's default funcion prototype aside).