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What are file descriptors, explained in simple terms?
...iptors, if you open lots of files at once. Which will prevent *nix systems from running, since they open descriptors to stuff in /proc all the time.
– Spencer Rathbun
May 10 '12 at 12:51
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What's the difference between URI.escape and CGI.escape?
...a string (URL) into, so called, "Percent-encoding".
CGI::escape is coming from the CGI spec, which describes how data should be encoded/decode between web server and application.
Now, let's say that you need to escape a URI in your app. It is a more specific use case.
For that, the Ruby community...
What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
...ice versa. This means that control needs to be transferred back and forth from ARC when bridging between CF types and Objective-C. Some keywords related to this bridging have been added, and Mike Ash has a great description of various bridging cases in his lengthy ARC writeup.
In addition to this,...
What does the explicit keyword mean?
... compiler can use constructors callable with a single parameter to convert from one type to another in order to get the right type for a parameter.
Here's an example class with a constructor that can be used for implicit conversions:
class Foo
{
public:
// single parameter constructor, can be used...
Is it possible to disable floating headers in UITableView with UITableViewStylePlain?
...arm!! The presence of a table header view header stops the section headers from floating. And an invisible header with appropriate content insets for the table does the trick .. Thank you so much! wonder why this answer's not getting much attention
– Shyam Bhat
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Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?
...t for specific values, so always use them as booleans and only assign them from their #define values.
Importantly, never test booleans using a character comparison -- it's not only risky because someVar could be assigned a non-zero value which is not YES, but, in my opinion more importantly, it fa...
How do I execute a program from Python? os.system fails due to spaces in path
I have a Python script that needs to execute an external program, but for some reason fails.
10 Answers
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ImportError: No module named Crypto.Cipher
...alenv keeps returning the error listed above. My import statement is just from Crypto.Cipher import AES . I looked for duplicates and you might say that there are some, but I tried the solutions (although most are not even solutions) and nothing worked.
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How to replace an entire line in a text file by line number
... @PubuduDodangoda sed -i would accomplish that
– SeanFromIT
Aug 9 at 1:43
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Correct format specifier for double in printf
...ote that this is one place that printf format strings differ substantially from scanf (and fscanf, etc.) format strings. For output, you're passing a value, which will be promoted from float to double when passed as a variadic parameter. For input you're passing a pointer, which is not promoted, so ...