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Why is enum class preferred over plain enum?
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conventional enums implicitly convert to int, causing errors when someone does not want an enumeration to act as an integer.
conventional enums export their enumerators to the surrounding scope, causing name clashes.
the underlying type of an enum cannot be specified, causing confusion, com...
String difference in Bash
...989 , here's your answer: $ diff <(echo "Here are the letters in String One.") <(echo "Here are the characters in String Two.") \n 1c1 \n < Here are the letters in String One. \n --- \n > Here are the characters in String Two. \n Using the pipe is similar, except it shows a process numb...
Capture Signature using HTML5 and iPad
Anyone know how this can be done? Would you use a canvas object, svg, jQuery, etc?
6 Answers
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Replace a string in shell script using a variable
... will cause confusion unless escaped. But if, as you say, you're replacing one number with another, that shouldn't be a problem.
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Facebook database design?
...de up of the two foreign
keys, both pointing back to the user table. One ID will point to the
logged in user, the other ID will point to the individual friend
of that user)
Example Usage:
Table User
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UserID EmailAddress Password Gender DOB Location
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static allocation in java - heap, stack and permanent generation
...ay be allocated directly into the tenured generation.
5) There is only one copy of each method per class, be the method static or non-static. That copy is put in the Permanent Generation area.
Assuming that you are referring to the code of the method, then AFAIK yes. It may be a little more c...
What is a memory fence?
...ome tricks that a processor does to optimize code?:
The most important one would be memory access reordering.
Absent memory fences or serializing instructions, the processor is free to reorder memory accesses. Some processor architectures have restrictions on how much they can reorder; Alph...
What is the difference between a HashMap and a TreeMap? [duplicate]
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HashMap allows null key and null values (Only one null key is allowed). If TreeMap uses natural ordering or its comparator, does not allow null keys, an exception will be thrown.
– madhu_karnati
Jul 18 '16 at 17:10
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source command not found in sh shell
...unning RHEL and Ubuntu servers and I always have small issues such as this one with Ubuntu. I really like RHEL and RHEL like linux.
– radtek
Mar 14 '14 at 19:05
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Grouped LIMIT in PostgreSQL: show the first N rows for each group?
... Very cryptic solution IMO, specially with those names, but a good one.
– villasv
May 8 '17 at 21:18
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