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What is the difference between memmove and memcpy?
...than memcpy and if you are unlucky, it may even be slower, so you can only win calling memcpy.
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Use of Initializers vs Constructors in Java
...initialization and still have the static variable be final. This is a big win.
I find "if (someStaticVar == null) // do stuff" to be messy and error prone. If it is initialized statically and declared final, then you avoid the possibility of it being null.
However, I'm confused when you say:
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.NET - Dictionary locking vs. ConcurrentDictionary
... Or, what if two customers reaches for the same item at the same time, who wins? Will there be a fight? This is a non-threadsafe-collection. There's plenty of ways to avoid problems, but they all require some kind of locking, or rather explicit access in some way or another.
On the other hand, cons...
Using str_replace so that it only acts on the first match?
... of mistakes. While substr_replace is a somewhat unwieldy function to use owing to all the parameters, the real issue is that doing string manipulation by numbers is just tricky sometimes - you have to be careful to pass the right variable/offset to functions. I'd actually go so far as to say that t...
Apache Prefork vs Worker MPM
... system unless a different one is choosen at compile-time (for instance on Windows mpm_winnt is used by default). Here's the list of operating systems and their default MPMs:
BeOS beos
Netware mpm_netware
OS/2 mpmt_os2
Unix/Linux prefork (update for Apache version ≥ 2.4: prefork, worker, or...
Getting the location from an IP address [duplicate]
...untry right, and at least close on the state/province, I'd consider that a WIN. If you happen to be using this to look-up info for a DOS attack, keep in mind the IPs might not even be valid (not assigned to anyone or outside valid public IP range).
– eselk
Apr...
What is a deadlock?
...ocess X and process Y
X starts to use A.
X and Y try to start using B
Y 'wins' and gets B first
now Y needs to use A
A is locked by X, which is waiting for Y
The best way to avoid deadlocks is to avoid having processes cross over in this way. Reduce the need to lock anything as much as you can.
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Making a property deserialize but not serialize with json.net
...rialization.Json & Newtonsoft.Json) and it worked for me like the following:
flag all your class and sub-classes as "DataContract".
flag all the properties of your class and sub-classes as "DataMember".
flag all the properties of your class and sub-classes as "JsonProperty" except those you ...
Check if a string contains one of 10 characters
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The following would be the simplest method, in my view:
var match = str.IndexOfAny(new char[] { '*', '&', '#' }) != -1
Or in a possibly easier to read form:
var match = str.IndexOfAny("*&#".ToCharArray()) != -1
Depending...
Python syntax for “if a or b or c but not all of them”
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All great answers, but this wins for conciseness, with great short-circuiting. Thanks all!
– Chris Wilson
May 13 '13 at 12:46
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