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Use C++ with Cocoa Instead of Objective-C?
...s that use C++ and the Cocoa frameworks because Apple is not making Carbon 64-bit capable. C++ seems to be pretty vanilla in its implementation on Linux and Windows but on Mac OS X it seems like additional Apple specific pieces of code are required (like an Obj-C wrapper). It also seems that Apple i...
Memory footprint of Haskell data types
...amongst all uses.
A word is 4 bytes on a 32-bit machine, and 8 bytes on a 64-bit machine.
So e.g.
data Uno = Uno a
data Due = Due a b
an Uno takes 2 words, and a Due takes 3.
The Int type is defined as
data Int = I# Int#
now, Int# takes one word, so Int takes 2 in total. Most unboxed type...
Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED
...
piggybackpiggyback
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How to reverse-i-search back and forth? [duplicate]
... '16 at 10:42
BringBackCommodore64BringBackCommodore64
2,65422 gold badges2020 silver badges2323 bronze badges
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What is an SSTable?
...nally, each SSTable contains a sequence of blocks (typically each block is 64KB in size, but this is configurable). A block index (stored at the end of the SSTable) is used to locate blocks; the index is loaded into memory when the SSTable is opened. A lookup can be performed with a single disk seek...
AtomicInteger lazySet vs. set
...rve as a soft barrier costing 20 cycles on nehelem intel cpu)
on x86 (x86_64) such a barrier is much cheaper performance-wise than volatile or AtomicLong getAndAdd ,
In an one producer, one consumer queue scenario, xchg soft barrier can force the line of codes before the lazySet(sequence+1) for p...
How to get ASCII value of string in C#
...wered Dec 30 '08 at 16:28
LeppyR64LeppyR64
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Converting a Java Keystore into PEM Format
... pub:
00:e2:66:5c:e0:2e:da:e0:6b:a6:aa:97:64:59:14:
7e:a6:2e:5a:45:f9:2f:b5:2d:f4:34:27:e6:53:c7:
bash$ keytool -importkeystore -srckeystore foo.jks \
-destkeystore foo.p12 \
-srcstoretype jks \
-deststoretype pkcs12
Enter ...
Tab space instead of multiple non-breaking spaces (“nbsp”)?
...nt font.   is slightly bigger. I can see the difference in Chrome 64 and FireFox 58.
– Dmitry
Mar 7 '18 at 14:00
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Pandas percentage of total with groupby
...1orerexp1orer
8,07255 gold badges2929 silver badges4646 bronze badges
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