Month: October 2022

[Solved] Variable keeps returning nil – Swift iOS

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All your suggestions were valid but this is what actually worked. import Foundation import Alamofire class GreetingObjectHandler { var greetings: [Greeting] = [] init(filename: String) { let fileP = NSURL(string: “http://localhost:2403/users/me”) let jsonD = NSData(contentsOfURL:fileP!) let jso = JSON(data: jsonD!, options: NSJSONReadingOptions.AllowFragments, error: nil) var id = jso[“id”] let filePath = NSURL(string: “http://localhost:2403/users”) let jsonData … Read more

[Solved] GCC compiler cannot find stdio.h

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I solved it. My problem was that I had two C compilers installed at the same time, the other one came along with Free Pascal. Found it out through checking every folder in my Path environment variable. Thanks for the replies. solved GCC compiler cannot find stdio.h

[Solved] The variable has not been assigned [duplicate]

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The problem is that you don’t initialize the property private Material material; When you create object like that you create a reference that points to null. In your code you are trying to modify this object but since it’s not initialized it’s null. The solution is to initialize it in the constructor like so: public … Read more

[Solved] Different ViewController if different selectedSegmentIndex

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First wire a segue for each viewController. control-drag from the viewController icon at the top of ViewControllerA to another ViewController and select the segue type. Click on the segue arrow between the viewControllers, and set its identifier in the Attributes Inspector on the right. Repeat steps 1 and 2 for each ViewControllerB, ViewControllerC and ViewControllerD … Read more

[Solved] Why doesnt vector support size as member variable like length variable in a Java class, instead a function size()? [closed]

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Why doesn’t std::vector or other containers have length as a member variable, instead of a function? Because it would be writable if it was a public member variable. Since it makes no sense to write to the size member of a vector, the designers made the size member private and provided a size() method to … Read more

[Solved] How to start an app “detached” in separate process. The started process must run in its own session and act like a daemon

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on linux go version 1.15.2, i run below code and it spawns a new process that does not die with main. package main import ( “log” “os” “os/exec” ) func main() { cmd := exec.Command(“go”, “run”, “./d”) cmd.Stdin = os.Stdin cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr log.Printf(“Running command and waiting for it to finish…”) err … Read more

[Solved] C++ : using prime number and not a prime number

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Just define a Boolean variable and set its value to ‘true’. You only need to run a loop “n/2 times” as the maximum divisor is half of the actual number. So, if the input number is divisible by any value between ‘2-n/2’, set the value of Boolean variable false. In the end, print the result … Read more

[Solved] Make div disappear and appear by clicking another div

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use .toggle() for example… $(function(){ $(“#red”).on(‘click’, function(){ console.log(‘click on red div’); $(“#blue”).toggle( “slow”, function() { // Animation complete. }); }); }); #red{ height: 100px; width: 100px; background: red; } #blue{ height: 100px; width: 100px; background: blue; } <script src=”https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js”></script> <div id=”red”></div> <div id=”blue”></div> solved Make div disappear and appear by clicking another div

[Solved] How much RAM would a lookup table for converting positive 32 bit integers to null terminated strings take

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Let S(n) be the string for number n. Consider S(429,496,730) through S(4,294,967,295). By partitioning this into subranges S(429,496,730) through S(999,999,999) and S(1,000,000,000) through S(4,294,967,295), we can see they require (999,999,999−429,496,730+1)•10 bytes and (4,294,967,295−1,000,000,000)•11 bytes (10 bytes for nine digits plus a null terminator, and similarly 11 bytes for 10 digits and a terminator.) This is … Read more

[Solved] C++ recursive algorithm for permutation [closed]

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Your problem seems to be in the “smallString” function. In that function, OutOfRange is used in s[j]. I put print like for(i=0,j=0;j<s.length();i++,j++) { if(i==k){j++;} cout<<“smallString:: s ::”<<s<<‘\t'<<“k::”<<k<<‘\n’; res.push_back(s[j]); //Problem is here… } Now Output print is like smallString:: s ::abc k::0 smallString:: s ::abc k::0 smallString:: s ::bc k::0 smallString:: s ::bc k::1 smallString:: s … Read more

[Solved] (?:\d[ -]*?){13,16} – confused with the priority that is given in matching the pattern to the given regex [duplicate]

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It captures 13-16 digits, each followed by zero or more spaces or dashes (the [ -]*?). In other words, the {13,16} applies to the entire group (?:\d[ -]*?). So, it could capture, for example, 1–2-3–4-5-6 7—–8-9-0-1-2-3-4-5-6-. In your sample case, it captures these 16 chunks: 4 5 6 4- 1 2 3 4- 4 3 … Read more