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Is storing a delimited list in a database column really that bad?
...n’t ensure that each value is the right data type: no way to prevent 1,2,3,banana,5
Can’t use foreign key constraints to link values to a lookup table; no way to enforce referential integrity.
Can’t enforce uniqueness: no way to prevent 1,2,3,3,3,5
Can’t delete a value from the list without ...
When to Redis? When to MongoDB? [closed]
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308
votes
I would say, it depends on kind of dev team you are and your application ne...
How to inspect Javascript Objects
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edited Mar 18 '11 at 21:13
answered Mar 18 '11 at 20:25
Ch...
Converting String to “Character” array in Java
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What's the nearest substitute for a function pointer in Java?
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edited Dec 31 '15 at 5:02
Mateen Ulhaq
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How to get year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java?
...direct getter available.
System.out.printf("%d-%02d-%02d %02d:%02d:%02d.%03d", year, month, day, hour, minute, second, millis);
Or, when you're not on Java 8 yet, make use of java.util.Calendar.
Calendar now = Calendar.getInstance();
int year = now.get(Calendar.YEAR);
int month = now.get(Calendar....
adding multiple entries to a HashMap at once in one statement
...Integer>()
{{
put("One", 1);
put("Two", 2);
put("Three", 3);
}};
As a piece of warning, please refer to the thread Efficiency of Java “Double Brace Initialization" for the performance implications that it might have.
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Iterating each character in a string using Python
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vallentin
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answered Feb 11 '09 at 19:30
hasenhasen
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Lambda Expression and generic method
...ethod in the functional interface has type parameters. See section §15.27.3 in JLS8:
A lambda expression is compatible [..] with a target type T if T is a functional interface type (§9.8) and the expression is congruent with the function type of [..] T. [..] A lambda expression is congruent wi...
Redis command to get all available keys?
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734
Try to look at KEYS command. KEYS * will list all keys stored in redis.
EDIT: please note the ...