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What does the PHP error message “Notice: Use of undefined constant” mean?

... You should quote your array keys: $department = mysql_real_escape_string($_POST['department']); $name = mysql_real_escape_string($_POST['name']); $email = mysql_real_escape_string($_POST['email']); $message = mysql_real_escape_string($_POST['message']); As is, it was looking for constants...
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Why are exclamation marks used in Ruby methods?

...e that someone else might have a reference to. Here's a simple example for strings: foo = "A STRING" # a string called foo foo.downcase! # modifies foo itself puts foo # prints modified foo This will output: a string In the standard libraries, there are a lot of places you'll see...
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Is there a wikipedia API just for retrieve content summary?

...: https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro&explaintext&redirects=1&titles=Stack%20Overflow or use pageids https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro&explaintext&redirects=1&amp...
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What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?

...e in the C++ community(particularly ##c++ on freenode) resent the use of wstrings and wchar_t , and their use in the windows api. What is exactly "wrong" with wchar_t and wstring , and if I want to support internationalization, what are some alternatives to wide characters? ...
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sqlalchemy: how to join several tables by one query?

...atever): class User(Base): __tablename__ = 'users' email = Column(String, primary_key=True) name = Column(String) class Document(Base): __tablename__ = "documents" name = Column(String, primary_key=True) author_email = Column(String, ForeignKey("users.email")) author = ...
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Convert a string representation of a hex dump to a byte array using Java?

I am looking for a way to convert a long string (from a dump), that represents hex values into a byte array. 24 Answers ...
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Making the Android emulator run faster

...ndows: Install "Intel x86 Emulator Accelerator (HAXM)" => SDK-Manager/Extras Install "Intel x86 Atom System Images" => SDK-Manager/Android 2.3.3 Go to the Android SDK root folder and navigate to extras\intel\Hardware_Accelerated_Execution_Manager. Execute file IntelHaxm.exe to install. (in A...
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How to make the python interpreter correctly handle non-ASCII characters in string operations?

I have a string that looks like so: 11 Answers 11 ...
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Is it possible to override JavaScript's toString() function to provide meaningful output for debuggi

... You can override toString in Javascript as well. See example: function Foo() {} // toString override added to prototype of Foo class Foo.prototype.toString = function() { return "[object Foo]"; } var f = new Foo(); console.log("" + f); ...
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Django: Set foreign key using integer?

...at the purpose of the above optimisation, but I would prefer an accidental extra query to being incorrect. So be careful, only use this when you are finished working on your instance (eg employee). share | ...