Tarik
What’s a .sh file?
What is a file with extension .sh? It is a Bourne shell script. They are used in many variations of UNIX-like operating systems. They have no “language” and are interpreted by your shell (interpreter of terminal commands) or if the first line is in the form #!/path/to/interpreter they will use that particular interpreter. Your file … Read more
React: useState or useRef?
The main difference between both is : useState causes re-render, useRef does not. The common between them is, both useState and useRef can remember their data after re-renders. So if your variable is something that decides a view layer render, go with useState. Else use useRef I would suggest reading this article.
Fatal error: unexpectedly found nil while unwrapping an Optional values [duplicate]
You can prevent the crash from happening by safely unwrapping cell.labelTitle with an if let statement. if let label = cell.labelTitle{ label.text = “This is a title” } You will still have to do some debugging to see why you are getting a nil value there though.
“Cannot send session cache limiter – headers already sent” [duplicate]
“Headers already sent” means that your PHP script already sent the HTTP headers, and as such it can’t make modifications to them now. Check that you don’t send ANY content before calling session_start. Better yet, just make session_start the first thing you do in your PHP file (so put it at the absolute beginning, before … Read more
Showing Thumbnail for link in WhatsApp || og:image meta-tag doesn’t work
I belive you need to add itemprop to the og:image meta tag, have the image size set to 256×256 and also it would not harm to add the site_name, type and updated_time properties either 🙂 <meta property=”og:site_name” content=”San Roque 2014 Pollos”> <meta property=”og:title” content=”San Roque 2014 Pollos” /> <meta property=”og:description” content=”Programa de fiestas” /> <meta … Read more
compareTo() vs. equals()
A difference is that “foo”.equals((String)null) returns false while “foo”.compareTo((String)null) == 0 throws a NullPointerException. So they are not always interchangeable even for Strings.
Git Diff with Beyond Compare
I don’t use extra wrapper .sh files. My environment is Windows XP, git 1.7.1 on cygwin, and Beyond Compare 3. Following is my .git/config file. [diff] tool = bc3 [difftool] prompt = false [difftool “bc3”] #use cygpath to transform cygwin path $LOCAL (something like /tmp/U5VvP1_abc) to windows path, because bc3 is a windows software cmd … Read more
PHP Function with Optional Parameters
What I have done in this case is pass an array, where the key is the parameter name, and the value is the value. $optional = array( “param” => $param1, “param2” => $param2 ); function func($required, $requiredTwo, $optional) { if(isset($optional[“param2”])) { doWork(); } }
How do I access the host machine from the guest machine? [closed]
On the XP machine, find your IP address by going to the command prompt and typing ipconfig. Try replacing the last number with 1 or 2. For example, if your IP address is 192.168.78.128, use http://192.168.78.1:3000.