[Solved] Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established in [duplicate]

mysql_real_escape_string() needs an active connection to the MySQL server and will initiate one with the default data from the php.ini configuration if there is none. Do not use this function without first connecting to the database. Also, do not use the mysql_* functions. They are deprecated and will be removed from PHP. 2 solved Warning: … Read more

[Solved] Why aren’t consecutively-defined variables in increasing memory locations?

There’s no reason for them to be, so the compiler does what’s best for itself. Complex compiler optimizations and efficient and linear memory layout don’t all go together, so linear memory layout was sacrificed. When you get to hashtables, you will learn how the most efficient algorithms lead to repeatable pseudo-random output order. The symbol … Read more

[Solved] Switch statement (Character) [closed]

A isn’t a valid character literal – ‘A’ is. So you want: switch (grade) { case ‘A’: nv[i] = 4; //nv = numerical value break; case ‘B’: nv[i] = 3; break; case ‘C’: nv[i] = 2; break; case ‘D’: nv[i] = 1; break; case ‘F’: nv[i] = 0; break; } You should also probably have … Read more

[Solved] List Combinations c#

Visual Studio was taking too long to load, so I did it in JavaScript since I could test in my console. This will print out all the choices. (Also it sounds more like a “what’s the algorithm for this?” not “what’s the algorithm for this in C#?”) function makeGroup(id, count) { var result = []; … Read more

[Solved] How do I divide an array into separate arrays in C#?

I probably interpret your question wrong, as this seems too easy: Determine into how many arrays the source array will be divided. (totalCount / elementsPerArray) For each array: Determine how many elements to put in it. (elementsRemaining / arraysRemaining) Copy those elements to a new array. In code: private static List<string[]> DivideStrings(int expectedStringsPerArray, string[] allStrings) … Read more

[Solved] Use .so (Shared object) file in Android studio

First, you need absolutly the header (.h) containing the function declaration. Secondly, you have to create a folder that contains your .so file, you can name it for example jniLibs and put it in src/main/jniLibs, then add the sourceSets to you gradle file, into the android block : sourceSets { main { jniLibs.srcDirs = [‘src/main/jniLibs’] … Read more

[Solved] Android studio fails to install apk into Xiaomi Note5A (Redmi) (Installation failed with message INSTALL_FAILED_USER_RESTRICTED:) [closed]

Here is the 100% working solution for this issue. It works in every xiaomi device and its tested – Go to Settings -> Permissions -> Install via USB: Uncheck your App if it’s listed. Go to Settings -> Additional Settings -> Privacy: Check the Unknown Sources option. Go to Settings -> Additional Settings -> Developer … Read more

[Solved] Can we protect against SQL-injection by writing Javascript code correctly? how? [closed]

Never try and prevent SQL injection solely by JavaScript. What happens if I turn JavaScript off? Your validation fails instantly. What happens if I modify your JS and remove the keywords you are preventing me from injecting? Always validate it against the server. solved Can we protect against SQL-injection by writing Javascript code correctly? how? … Read more

[Solved] .php file on website, source in html [closed]

It would be a horrendous security hole if you could view source and see the underlying PHP code – you’d see database credentials, trade secrets, etc. PHP is a server-side language. It gets executed on the server, usually to build HTML that then gets output to the browser. solved .php file on website, source in … Read more