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Pro JavaScript programmer interview questions (with answers) [closed]
...in as much or as little detail as you feel comfortable.
Novice JS programmers might have a basic answer about locals vs globals. Intermediate JS guys should definitely have that answer, and should probably mention function-level scope. Anyone calling themselves an "advanced" JS programmer should...
What are the basic rules and idioms for operator overloading?
... , but since many users sort answers according to votes, rather than the time they were given, here's an index of the answers in the order in which they make most sense:
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Unable to cast object of type 'System.DBNull' to type 'System.String`
... "null" value. The DBNull.Value would work for a SqlDataReader or a SqlParameter - but not for this object here.
– marc_s
May 15 '09 at 20:27
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To ternary or not to ternary? [closed]
...nary operator: () ? : ; I do realize that it has its place, but I have come across many programmers that are completely against ever using it, and some that use it too often.
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How can I detect if a file is binary (non-text) in python?
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You can also use the mimetypes module:
import mimetypes
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mime = mimetypes.guess_type(file)
It's fairly easy to compile a list of binary mime types. For example Apache distributes with a mime.types file that you could parse into a set of lists...
Asynchronous shell exec in PHP
...& to background the process?
EDIT - incorporating what @AdamTheHut commented to this post, you can add this to a call to exec:
" > /dev/null 2>/dev/null &"
That will redirect both stdio (first >) and stderr (2>) to /dev/null and run in the background.
There are other ways to...
Can I load a .NET assembly at runtime and instantiate a type knowing only the name?
Is it possible to instantiate an object at runtime if I only have the DLL name and the class name, without adding a reference to the assembly in the project? The class implements a interface, so once I instantiate the class, I will then cast it to the interface.
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Why is a C++ Vector called a Vector?
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Mathematical definition of a vector is a member of the set Sn, which is an ordered sequence of values in a specific set (S). This is what a C++ vector stores.
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What is the difference between parseInt(string) and Number(string) in JavaScript? [duplicate]
...string into a number, which can also be a float BTW.
EDIT #1: Lucero commented about the radix that can be used along with parseInt(). As far as that is concerned, please see THE DOCTOR's answer below (I'm not going to copy that here, the doc shall have a fair share of the fame...).
EDIT #2: R...