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What does the “yield” keyword do?
What is the use of the yield keyword in Python, and what does it do?
42 Answers
42
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Is errno thread-safe?
...no; so my question is, is it safe to check errno value after some calls or use perror() in multi-threaded code. Is this a thread safe variable? If not, then whats the alternative ?
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Getting unique items from a list [duplicate]
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Use a HashSet<T>. For example:
var items = "A B A D A C".Split(' ');
var unique_items = new HashSet<string>(items);
foreach (string s in unique_items)
Console.WriteLine(s);
prints
A
B
D
C
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Execute command without keeping it in history [closed]
I want to execute some commands but don't want to store them in the command history. So that nobody will be able to search it in the .bash_history file.
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How to install JSTL? The absolute uri: http://java.sun.com/jstl/core cannot be resolved
I don't know what I've done incorrectly, but I can't include JSTL. I have jstl-1.2.jar, but unfortunately I get exception:
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Redirect all to index.php using htaccess
I'm writing a simple PHP-based MVC-ish framework. I want this framework to be able to be installed in any directory.
7 Answ...
Difference between “git add -A” and “git add .”
...mand git add [--all|-A] appears to be identical to git add . . Is this correct? If not, how do they differ?
11 Answers
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INSERT … ON DUPLICATE KEY (do nothing)
I have a table with a unique key for two columns:
3 Answers
3
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What are deferred objects?
...lback queues, invoke callback queues as appropriate, and relay the success or failure state of any synchronous or asynchronous function.
Deferred Methods:
deferred.done()
Add handlers to be called when the Deferred object is resolved.
deferred.fail()
Add handlers to be called when the Deferred ...
Convert .pem to .crt and .key
Can anyone tell me the correct way/command to extract/convert the certificate .crt and private key .key files from a .pem file? I just read they are interchangable, but not how.
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