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How to Deal with Temporary NSManagedObject instances?
...ome stuff with them and then trash them or store to sqlite db. The problem is, I cannot create instances of NSManagedObject unconnected to NSManagedObjectContext and this means I have to clear up somehow after I decide that I don't need some of the objects in my db.
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Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
Should I test if something is valid or just try to do it and catch the exception?
8 Answers
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Fastest Way to Serve a File Using PHP
...g to put together a function that receives a file path, identifies what it is, sets the appropriate headers, and serves it just like Apache would.
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What are CN, OU, DC in an LDAP search?
I have a search query in LDAP like this. What exactly does this query mean?
3 Answers
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Is it better in C++ to pass by value or pass by constant reference?
Is it better in C++ to pass by value or pass by constant reference?
10 Answers
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Why do you need to put #!/bin/bash at the beginning of a script file?
..., you might see #!/bin/perl or #!/bin/perl5.
PS:
The exclamation mark (!) is affectionately called "bang". The shell comment symbol (#) is sometimes called "hash".
PPS:
Remember - under *nix, associating a suffix with a file type is merely a convention, not a "rule". An executable can be a binar...
Why not use exceptions as regular flow of control?
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Have you ever tried to debug a program raising five exceptions per second in the normal course of operation ?
I have.
The program was quite complex (it was a distributed calculation server), and a slight modification at one side of the program could easily break s...
Differences between Java 8 Date Time API (java.time) and Joda-Time
...e type (called LocalTime) and the composition (called LocalDateTime). That is a very big win compared with old java.util.Calendar and java.util.Date.
d) Both libraries use a method-centric approach meaning they encourage the user to use getDayOfYear() instead of get(DAY_OF_YEAR). This causes a lot ...
select * vs select column
...and I query SELECT * instead of providing those columns in select query, is there any performance degradation regarding more/less I/O or memory?
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Performance of Arrays vs. Lists
Say you need to have a list/array of integers which you need iterate frequently, and I mean extremely often. The reasons may vary, but say it's in the heart of the inner most loop of a high volume processing.
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