function

问题 I need two instances of the same function (not just alias). One thing that definitely works is void writedata(union chip *tempchip, unsigned char *datapos, int datanum) { blahblah } void writestring(union chip *tempchip, unsigned char *datapos, int datanum) { writedata(tempchip, datapos, datanum); } This is kind of silly, because the second just passes parameters to the first. So I tried to be "smart" and make a pointer void writedata(union chip *tempchip, unsigned char *datapos, int datanum)

问题 I have a similar question like this, but for PostgreSQL. I am using PostgreSQL 9.5.12 (x64) on my Windows 10 (x64) machine. I have a function (written in plpgsql ) my_func() in database my_db . Is it possible to import/copy this function to another database in postgres? 回答1: In psql the \ef command will open the function in an editor you can then save it to a file... unfortunately the UI of the windows version of psql was pretty cruddy last time I checked. a pg_dump of the database with -

问题 This question already has answers here : What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 and x86-64 (4 answers) Where is the x86-64 System V ABI documented? (3 answers) Why does Windows64 use a different calling convention from all other OSes on x86-64? (4 answers) Closed 5 months ago . I want to write a function that does something like: def addme(x, y): return x + y I know there is already an instruction for this, but I'm practicing how to

问题 I have a variable and I want my user to be able to change this variable. The original value of the variable should change, so it can be also be used in another function. (The user enters a new date, and this variable then gets changed at the end of the url (of the other function, that calls the map), which then shows the data from that date.) I know I have to make my variable global, but I still doesn't work. It's probably something dumb, but I just can't seem to make it work. What am I doing

问题 I have written this program to find the first occurrence of the character in the user given string and frequency of that character. But when I print the value of variable i_r inside the main function it prints zero. But in side find_ch it shows right value. Why is this happening? #include<iostream> #include<string> using namespace std; string::size_type find_ch(string &str,char ch,int &i_r) { string::size_type first=0; for(auto i=static_cast<int>(str.size())-1;i>0;i--) { cout<<"Value of i_r :

问题 My problem is about passing a member function from a Class A, to a member function of a Class B: I tried something like this : typedef void (moteurGraphique::* f)(Sprite); f draw =&moteurGraphique::drawSprite; defaultScene.boucle(draw); moteurGraphique is A class, moteurGraphique::drawSprite is A member function, defaultScene is an instance of B class, and boucle is B member function. All that is called in a member function of A: void moteurGraphique::drawMyThings() I tried different ways to

问题 I'm trying to produce a SKU in Google Sheets for a product using the values of three variants (Title, Colour and Size) The product is 'Lightweight trainers' with colour variants of 'Red' and 'Blue', and the sizes range from 5 - 12. Link to spreadsheet https://docs.google.com/spreadsheets/d/1trq0X3MjR-n2THFnT8gYYlwKscnQavCeeZ8L-ifYaHw/edit?usp=sharing Aim I'm hoping to have a SKU that displays the product, the colour variant and the shoes size. Example: LW-1-8 (Lightweight trainer, colour Red,

问题 I have a code in MATLAB that I have to convert into Octave. I have problems with the following command: boxes = regionprops (L, 'Solidity') where L is a binary image class double. Octave does not know the 'Solidity' property . Is there a similar property or a function that I can use to run the code in Octave? 回答1: According to the definition of 'Solidity' in matlab regionprops this measurement is the Area/ConvexArea. In order to calculate the ConvexArea do the following things: Get id list of

问题 When I press F12 then I get h-file with function prototype. But I want get function body. I didn't find any context menu item which does it. So I am forced to find function body manually that sometimes is hard. 回答1: F12 goes to the function body if InteliSense knows where it is. The source code of the function body must be part of the VS solution. Note that Intelisense is known to have bugs so it's not working as expected 100% of the time. 回答2: If you are using Visual Studio 2010 or later

问题 return a or b or c or d; That statement returns either true or false in C++, and I know the reason for this. But I need a workaround so that I can return the first non-zero value via that return statement (or something similar) like it happens in Python . I am not looking for conditional statements as it looks untidy sometimes. Basically, can the following code be shortened via a macro or something else? int fun(int a, int b, int c, int d) { return a ? a : b ? b : c ? c : d; } 回答1: I would