Take out the echo calls, you can’t send information to the browser before the headers. You can try something like this to still show if an error happens: if(!$retval) { echo “Unsuccessfull ” . mysql_error(); } solved Cannot modify header information [duplicate]
Is an automatic quiz generator possible? It depends on what you call automatic, and what you consider a successful level of functionality. Something is definitely possible. Is it that automatic, or do you have to enter your own questions and correct answers? Can it observe text syntax so that it can create questions based on … Read more
No matter how complex you make your code, it can always be read, if necessary with abstract interpretation, i.e. automatically capturing the essence of your code. Code without knowledge of internals, variable names (I assume you’re already using minimization, for example with the YUI compressor), documentation, support, and generalization is worthless for anyone else. If … Read more
use File::Find::Rule; my @array = File::Find::Rule->directory->in(‘/home’); File::Find::Rule 1 solved listing directories and sub-directories to an array with path;
If this is an exercise in using Regular Expressions, so you really want to use a Regular Expression to solve it, you can do something like this: regex = /^(PL|PH|MH|M)$/ choices = [“PL”, “PH”, “M”, “MH”, “other”, “invalid”, “value”] index = Math.floor(Math.random() * choices.length) input = choices[index] console.log(“Testing”, ‘”‘+input+'”‘) x = input.match(regex) if (x) { … Read more
From my point of view, the best you can do is to read the whole documentation https://docs.djangoproject.com/en/3.0/ it answers most of the questions you might have and it shows what is possible to do with Django. Its very well written and I really enjoyed reading it. You should be able to write your Django app … Read more
You are looking for media queries Here is a really quick example I have put together. Click the “Full page” to play around with it and see how it works. This is based on your updated question with the code snippet. I basically added the px to your media queries, and used max-width instead of … Read more
The main difference is that getElementById will get an element from the DOM by it’s ID attribute, and createElement will create an entirely new DOM element. Let’s say you had a page with the following HTML: <!doctype html> <html> <head> </head> <body> <div>Hello, World!</div> <div id=”message”>What a nice day!</div> </body> </html> And then you had … Read more
“can I do it with xcode 9?” I’m not 100% sure about Xcode 9 beta, but previously you were not able to submit to the App Store using beta versions of Xcode. You’d receive an error stating: INFO ITMS-90111: “Your app is built with a beta version of Xcode or iOS SDK. Only apps distributed … Read more
The following solution worked. Instead of using int(x) , we need to use len(x.encode(‘utf-8′)) so the final code is updated as import io with io.open(r’C:\Python\Data\somefile.txt’,’r+’) as fp: bytecolumn = (line.rsplit(None,1)[1] for line in fp) bytes = ( len(x.encode(‘utf-8’)) for x in bytecolumn if x != ‘-‘) print(‘Total’, sum(bytes)) solved Python – ValueError: invalid literal for … Read more
You cannot achieve this if you want to stay with your custom type. Reason is that if you define a type with some properties then when initializing that type the properties are there, whether you assign to them a value or not. However using anonymous types and dynamic you can: var result = data.Select(item => … Read more
Simple Google will solve more than 95% of your early questions into coding 😉 https://en.wikipedia.org/wiki/Document_type_declaration#HTML_4.01_DTDs and https://en.wikipedia.org/wiki/Document_type_definition The short summary: HTML is a subset of XML (eXtensible Markup Language) with specified tags. In XML you can use a wide range of custom tags (called elements) like <price value=”10″ currency=”euro”></price> So to bring order and consistency … Read more
The Main approach for checking elements of a list in a string is : s=””‘<a href=”https://ertfwetwer” target=”_blank”>[Nerve Center]</a>”’ my_list=[‘href’,’a’] def checker(mylist, my_string) new = list() for i in mylist: if i in my_string: # if elements is in string (you can check only special elements ) print i ,’is in string’ new.append(i) #storing result to … Read more
Check return value of scanf and clear input buffer in case of illegal input. Like this: #include <stdio.h> #include <stdbool.h> int main(void) { float sales, commission, earnings; int state; while(true) { printf( “Enter sales in dollars ( -1 to end ): ” ); if((state = scanf(“%f”, &sales )) != 1){ if(state == EOF) return 0; … Read more
Try this String s; DateFormat formatter; formatter = new SimpleDateFormat(“yyyy-MM-dd”); Date date1 = formatter.parse(“2013-07-17”); formatter = new SimpleDateFormat(“yyMMdd”); s = formatter.format(date1); System.out.println(s); 0 solved How to format a date from yyyy-MM-dd to yyMMdd [closed]