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How to solve PHP error 'Notice: Array to string conversion in…'

...n $_POST['C']. So when you echo that, you are trying to print an array, so all it does is print Array and a notice. To print properly an array, you either loop through it and echo each element, or you can use print_r. Alternatively, if you don't know if it's an array or a string or whatever, you c...
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Can someone explain how to implement the jQuery File Upload plugin?

...de to upload the files: $('#upload').fileupload({ // This function is called when a file is added to the queue add: function (e, data) { //This area will contain file list and progress information. var tpl = $('<li class="working">'+ '<input type="text" value="...
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What is the difference between 'my' and 'our' in Perl?

... On the other hand, our variables are package variables, and thus automatically: global variables definitely not private not necessarily new can be accessed outside the package (or lexical scope) with the qualified namespace, as $package_name::variable. Declaring a variable with our allows you...
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How to combine two or more querysets in a Django view?

...sets into a list is the simplest approach. If the database will be hit for all querysets anyway (e.g. because the result needs to be sorted), this won't add further cost. from itertools import chain result_list = list(chain(page_list, article_list, post_list)) Using itertools.chain is faster than...
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How do you build a Singleton in Dart?

... There's the weird syntax Singleton._internal(); that looks like a method call when it's really a constructor definition. There's the _internal name. And there's the nifty language design point that Dart lets you start out (dart out?) using an ordinary constructor and then, if needed, change it to a...
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How can I find the data structure that represents mine layout of Minesweeper in memory?

...n. I've found this MSDN article on a simple WinDbg command that reveals all the mines but it is old, is not explained in any detail and really isn't what I'm looking for. ...
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What is the default text size on Android?

...ues are defined within the following TextAppearances: - TextAppearance.Small - TextAppearance.Medium - TextAppearance.Large More information about Typography can be found in the design guidelines Related to your question: If you don't set a custom textSize or textAppearance, TextAppearance.S...
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How can I get all the request headers in Django?

I need to get all the Django request headers. From what i've read, Django simply dumps everything into the request.META variable along with a lot aof other data. What would be the best way to get all the headers that the client sent to my Django application? ...
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What is a good regular expression to match a URL? [duplicate]

... I changed your expression a bit so it will work in all cases i need, including uri with http:// or www "/([^\s\.]+\.[^\s]{2,}|www\.[^\s]+\.[^\s]{2,})/gi" – Ismael Jan 14 '15 at 11:08 ...
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Is there a way to make npm install (the command) to work behind proxy?

...roxy variable in a .npmrc file but it does not work. Trying to avoid manually downloading all require packages and installing. ...