= is an assignment statement, you appear to be confusing this with a ==, the equality comparison operator. The statements are entirely different: self.name = name assigns the value referenced by the local variable name to the attribute name on the object referenced by self. It sets an attribute on the newly created instance, from … Read more
I’m assuming your grids are all exactly the same size, and are arranged in a perfect rectangle, as indicated by your image. How about storing all grids in a simple 2D array? You can then find the index of any grid by doing grid_size = 30; index_x = math.floor(user.x/grid_size); index_y = math.floor(user.y/grid_size); 4 solved What … Read more
In one case, you use size_t, in the other case you use int. If the length is for example 6 characters, then s.size () – 7 is not -1, but one huge number and everything goes wrong. But if you write int len = strlen (…), then len – 7 is indeed -1 and everything … Read more
The answer is “it depends”, or perhaps better put as “nobody knows”, as this type of question is always tightly coupled with compiler optimisations, processor architecture and many other factors. I would also like to point out that if you find one better on one system, it may not reflect that it’s better in a … Read more
Let’s look at it line by line. int cin; This line declare a local variable named cin. From now on, whenever you write cin, the compiler always believe you mean this local variable, not the input stream object std::cin. cin >> cin; This line read the local variable and perform bit shifting. When both sides … Read more
Use arrow function instead so: Change onFormSubmit(event){ event.preventDefault(); console.log(this.state.term); } To onFormSubmit= (event)=>{ event.preventDefault(); console.log(this.state.term); } solved TypeError: Cannont Read Property `State` of Undefined
Many thanks to Jdweng for providing a solution. I modified their code slightly so that it didn’t rely on making the datatable manually and instead took it from my SQLite database file. Jdweng’s code also made a ‘Root’ node which was not necessary for my application so I changed it to only include the nodes … Read more
You should use r.nextInt(3); to get a number from the range 0-2. So, switch(r.nextInt(3)) { case 0: myVar = “a”; break; case 1: myVar = “b”; break; case 2: myVar = “c”; break; } 0 solved How do yo randomly assign a value to a variable? [closed]
I was not adding User-Agent in header so the server refused all my request.Thats why I got banned from the server. return builder.addInterceptor(interceptor) .addInterceptor { val original = it.request(); val authorized = original.newBuilder() .removeHeader(“User-Agent”) .addHeader(“User-Agent”, System.getProperty(“http.agent”)) .build(); it.proceed(authorized); } .build() For better understanding about user-agent, go through this link. 1 solved Android Studio : You … Read more
Change: for (int i = 0; i > cars.Count; i++) To: for (int i = 0; i < cars.Count; i++) solved Searching for a String in a text file
This is just a direct translation of your plyr call in dplyr: library(dplyr) DF2 = summarise(group_by(DF, id, feature), value=value[which(date == max(date))]) 2 solved summarizing a field based on the value of another field in dplyr
You have in your code: [formatter setDateFormat:@”yyyy-MMM-dd HH:mm”]; But your string needs the following: [formatter setDateFormat:@”yyyy-MM-dd HH:mm:ss”]; 2 solved NSDateFormatter dateFromString returns null value [closed]
Note that “reachability” on IP networks is kind of tricky to test for. It’s perfectly possible that a server machine is running any number of real services (www, ftp, whatever), but has been configured not to reply to pings since some people do that. If possible, it’s better to just connect like the real service … Read more
You could simply do this through awk, $ awk -F[,-] ‘{var=$1″-“$2; for (i=3;i<=NF;i++){print var”-“$i}}’ file 86-22-63385835 86-22-63385836 86-22-63385933 86-0577-88609993 86-0577-88835386 86-21-58947602 86-21-58947603 0086-755-33186858 0086-755-33186862 0086-755-33186859 2 solved How to process this text [closed]
Before you can develop anything for the wearable platform, you need to prepare your development environment by installing and updating all the packages you’ll need, ensuring your Android Studio IDE is up to date. open the Android SDK Manager and check you have the latest versions of the following three packages: SDK Tools Platform tools … Read more