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Most efficient way to increment a Map value in Java
...th the standard JDK, ConcurrentMap and AtomicLong can make the code a tiny bit nicer, though YMMV.
final ConcurrentMap<String, AtomicLong> map = new ConcurrentHashMap<String, AtomicLong>();
map.putIfAbsent("foo", new AtomicLong(0));
map.get("foo").incrementAndGet();
will l...
SET NOCOUNT ON usage
...still there as ULONGLONG (64 bytes) and flag DONE_COUNT is still there but bit value is 0. SQL server will count number of rows anyways, even tho you are not interested to read value from DONE token. If you read @@ROWCOUNT then you added more bytes to token stream either in form of returnvalue token...
C read file line by line
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answered Aug 17 '10 at 11:03
mbaitoffmbaitoff
7,47544 gold badges2121 silver badges3131 bronze badges
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Android - Start service on boot
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Yup, it was a bit though to sort your problem, so better posted a hello world example.
– Lalit Poptani
Oct 7 '11 at 17:22
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In pure functional languages, is there an algorithm to get the inverse function?
...ssible in general.
Proof: consider bijective functions of type
type F = [Bit] -> [Bit]
with
data Bit = B0 | B1
Assume we have an inverter inv :: F -> F such that inv f . f ≡ id. Say we have tested it for the function f = id, by confirming that
inv f (repeat B0) -> (B0 : ls)
Sinc...
How do I remedy “The breakpoint will not currently be hit. No symbols have been loaded for this docu
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1110
Start debugging, as soon as you've arrived at a breakpoint or used Debug > Break All, use De...
How to set a JVM TimeZone Properly
...one instead of an OS defined timezone. My JDK version is 1.5 and the OS is Windows Server Enterprise (2007)
7 Answers
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Command Prompt - How to add a set path only for that batch file executing?
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There is an important detail:
set PATH="C:\linutils;C:\wingit\bin;%PATH%"
does not work, while
set PATH=C:\linutils;C:\wingit\bin;%PATH%
works. The difference is the quotes!
UPD also see the comment by venimus
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Python __str__ and lists
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Or just print(map(str, mylist)) - it is a tiny bit shorter
– anula
May 20 '16 at 20:04
4
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Why does the order of the loops affect performance when iterating over a 2D array?
... issue is the store to the memory location in the array: x[i][j]. Here's a bit of insight why:
You have a 2-dimensional array, but memory in the computer is inherently 1-dimensional. So while you imagine your array like this:
0,0 | 0,1 | 0,2 | 0,3
----+-----+-----+----
1,0 | 1,1 | 1,2 | 1,3
----+-...