You probably meant to write a * (a//b). Multiplication happens before division, since it’s on the left and has same priority. solved a * a//b doesn’t work properly in Python (// Operator)
This is a classic Relational Division With Remainder question. You just need to frame it right: You want all Tasks… … whose TaskTags divide the set of all UserTags for a given User There can be a remainder of UserTags but not a remainder of TaskTags so the former is the dividend, the latter is … Read more
Not super-short: List(1,2,3,4).grouped(2).collect{ case List(k,v) => k -> v }.toMap 2 solved How to convert scala List in to Map
Like @B-and-P describes in his comment. You can do this using LPAD. UPDATE customer_db SET number = LPAD(FLOOR(number + rand()*1000000),10,0) LPAD uses 3 parameters; string, total amount of characters and last but not least which character should be used for padding. 1 solved How to random a zero leading string field mysql [duplicate]
parse the string into components; possibly by position, possibly with Parse, possibly with regex decide what rules you want for each output use it For example: static string SimplifyTime(string value) { var match = Regex.Match(value, “([0-9]{2})hr:([0-9]{2})min:([0-9]{2})sec”); if (!match.Success) return value; int val = int.Parse(match.Groups[1].Value, CultureInfo.InvariantCulture); if (val > 0) return val + “hr Ago”; val … Read more
An example that works: // example data sysuse auto, clear // what you want local first weight local second `first’ mpg // example use of local second regress price `second’ Edit To answer your comment: Yes, your problem are the double quotes. That doesn’t mean, however, that using double quotes will automatically get you in … Read more
If I understand the question correctly, you could use the function in the reference as is. oldArray = GrowArray(oldArray, oldCount, newCount); It could be modified to use a local temporary and then std::swap, but this would depend a lot on the context in which it is used. 1 solved Reallocating an array that is an … Read more
The .upper() and .lower() functions do not modify the original str. Per the documentation, For .upper(): str.upper() Return a copy of the string with all the cased characters converted to uppercase. For .lower(): str.lower() Return a copy of the string with all the cased characters converted to lowercase. So if you want the uppercase and … Read more
You are missing the Project name/context path in your url: http://localhost:8080/ProjectName/sayhello solved HTTP status: 404 – Java Servlet [closed]
Assembled from comments (because it was easier than finding a dupe): In modern C (that is, C from this century), all functions need a return type and the only two legal prototypes for main are: int main(void) int main(int argc, char* argv[]) An obsolescent way to write the first is int main(). On Max OS, … Read more
Node.js is the best for this. It gives you acces to your local file system. Example: var fs = require(‘fs’); fs.writeFile(“/tmp/test.txt”, “Hey there!”, function(err) { if(err) { console.log(err); } else { console.log(“The file was saved!”); } }); solved How to write a text file on server using JavaScript? [closed]
if (a == NULL) can’t work since you are comparing a std::string with an Integer which is not possible. if you want to create an empty string and test for emptiness just do: string a; if (a.empty()) { /* do something */ } 2 solved checking `aStr == null` in C++
If by “best” you mean “most memory and/or runtime efficient” then you’re probably best off with a StringBuilder you pre-allocate. (Having looked at the implementation of String.join in the JDK, it uses StringJoiner, which uses a StringBuilder with the default initial capacity [16 chars] with no attempt to avoid reallocation and copying.) You’d sum up … Read more
Using a mask defined by any of the “imroi” functions – imfreehand and imellipse included, you can use roifilt2 to filter just the roi using a given filter or function. First, define the area: imshow(I); %display your image h = imfreehand; % now pick the region BW = createmask(h); %makes BW mask Then, use roifilt2 … Read more
If your platform has conio.h available and your compiler supports C++11 (including <chrono>) you can do it like this: #include <iostream> #include <chrono> #include <conio.h> int main(int argc, char* argv[]){ std::chrono::time_point<std::chrono::system_clock> start; start = std::chrono::system_clock::now(); /* start timer */ while(true){ __int64 secondsElapsed = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now()-start).count(); if(secondsElapsed >= 20){ /* 20 seconds elapsed -> leave main lopp … Read more