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Getting an object from an NSSet
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You can also look up a known object by a potential duplicate by sending the set a member: message. If it returns nil, the set does not contain an object equal to the one you passed; if it returns an object pointer, then the pointer it returns is to the object a...
Stop and Start a service via batch or cmd file?
...has the form "\\ServerName"
Further help on commands can be obtained by typing: "sc [command]"
Commands:
query-----------Queries the status for a service, or
enumerates the status for types of services.
queryex---------Queries the extended status f...
Why is creating a new process more expensive on Windows than Linux?
...y cheap when COW is used, but as a matter of fact, fork is mostly followed by an exec. And an exec has to load all images as well. Discussing the performance of fork therefore is only part of the truth.
When discussing the speed of process creation, it is probably a good idea to distinguish between...
Do I set properties to nil in dealloc when using ARC?
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@emfurry: It probably doesn't, because by the time your view controller dies the view itself should not be in the view hierarchy and shouldn't be doing anything, but it's best not to make assumptions. What if the view asynchronously scheduled work to be done later...
Is there a (repeat-last-command) in Emacs?
...ed in, the command-history function might be of interest. You can get that by M-x command-history
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User Authentication in ASP.NET Web API
... confused about these two concepts:
Authentication is the mechanism whereby systems may securely identify their users. Authentication systems provide an answers to the questions:
Who is the user?
Is the user really who he/she represents himself to be?
Authorization is the mechanism by which a s...
Java's L number (long) specification
...al type (e.g. 3.14159), it is assumed to be a double.
In all other cases (byte, short, char), you need the cast as there is no specific suffix.
The Java spec allows both upper and lower case suffixes, but the upper case version for longs is preferred, as the upper case L is less easy to confuse wi...
Can I install Python windows packages into virtualenvs?
...re can I download binary eggs with psycopg2 for Windows?
UPDATE
As noted by Tritium21 in his answer nowadays you should use pip instead of easy_install. Pip can't install binary packages created by distutils but it can install binary packages in the new wheel format. You can convert from old forma...
Stream vs Views vs Iterators
...ively defined). One can avoid keeping all of the Stream in memory, though, by making sure you don't keep a reference to its head (for example, by using def instead of val to define the Stream).
Because of the penalties incurred by views, one should usually force it after applying the transformation...
What is the difference between an ordered and a sorted collection?
... be from min number to max number
for a person collection, it may be sored by the height of persons or the weight of persons, etc.
When talking about order, it usually means the order of insertion. The order may be changed after sorting
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