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How to pattern match using regular expression in Scala?
...s an old discussion - I'm probably grave-digging): you can remove the '.*' from the end since it doesn't add any value to the regex. Just "Cat".matches("^[a-cA-C]")
– akauppi
Mar 29 '13 at 14:47
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Is it worthwile to learn assembly language? [closed]
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I learned from Kip Irvine's book. If you ignore the (fair) criticisms of his (irrelevant) libraries, I can recommend it as a good introduction to the language itself -- although for the really interesting stuff you have to hunt out obs...
What is a race condition?
...act. You have no real way of knowing.
In order to prevent race conditions from occurring, you would typically put a lock around the shared data to ensure only one thread can access the data at a time. This would mean something like this:
// Obtain lock for x
if (x == 5)
{
y = x * 2; // Now, not...
Java: how to convert HashMap to array
...().toArray()[0] will be the original key for hashMap.values().toArray()[0] from the original Map. So this is extremely dangerous
– CrackerJack9
Aug 7 '11 at 18:20
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Why use a prime number in hashCode?
...wer of two, which permits for bitwise optimization
Here's the full quote, from Item 9: Always override hashCode when you override equals:
The value 31 was chosen because it's an odd prime. If it were even and multiplication overflowed, information would be lost, as multiplication by 2 is equivalen...
Design by contract using assertions or exceptions? [closed]
...t they are calling a function with a condition breach, but don't stop them from using it if they feel they know better. The breach could cause exceptions to occur, but I see that as a different thing.
– Matt_JD
May 22 '11 at 7:45
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Error Code: 1005. Can't create table '…' (errno: 150)
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This could also happen when exporting your database from one server to another and the tables are listed in alphabetical order by default.
So, your first table could have a foreign key of another table that is yet to be created. In such cases, disable foreign_key_checks and cr...
How can I get browser to prompt to save password?
...eliably, some browsers do not trigger the "remember" feature if you submit from Javascript.
– JustAMartin
Dec 8 '17 at 15:46
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Using ping in c#
... The packet contains a header of 20 bytes which contains the response data from the server which received the ping request. The .Net framework System.Net.NetworkInformation namespace contains a class called PingReply that has properties designed to translate the ICMP response and deliver useful info...
Authenticating in PHP using LDAP through Active Directory
... to both Windows Server 2003 and Windows Server 2008 R2 domain controllers from a Windows Server 2003 Web Server (IIS6) and from a windows server 2012 enterprise running IIS 8.
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