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SparseArray vs HashMap
...<V> values;
}
Class = 12 + 8 * 4 = 48 bytes
Entry = 32 + 16 + 16 = 64 bytes
Array = 20 + 1000 * 64 = 64024 bytes
Total = 64,136 bytes
Source: Android Memories by Romain Guy from slide 90.
The numbers above are the amount of memory (in bytes) allocated on heap by JVM.
They may vary dependin...
Should I use the datetime or timestamp data type in MySQL?
...doitlikejustin
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answered Jan 3 '09 at 16:26
blivetblivet
19.1k11 gold badge...
How to find the installed pandas version
...ERSIONS
------------------
commit: None
python: 2.7.6.final.0
python-bits: 64
OS: Linux
OS-release: 3.13.0-45-generic
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: None
LANG: en_US.UTF-8
pandas: 0.15.2-113-g5531341
nose: 1.3.1
Cython: 0.21.1
numpy: 1.8.2
scipy: 0.14.0.dev-371b4ff
stat...
What is the difference between Int and Integer?
...ay
recognise the "bignum" type here.
"Int" is the more common 32 or 64 bit
integer. Implementations vary,
although it is guaranteed to be at
least 30 bits.
Source: The Haskell Wikibook. Also, you may find the Numbers section of A Gentle Introduction to Haskell useful.
...
How to throw an exception in C?
...t) (void *) );
extern void * _ZTIl; // typeinfo of long
int bar1()
{
int64_t * p = (int64_t*)__cxa_allocate_exception(8);
*p = 1976;
__cxa_throw(p,&_ZTIl,0);
return 10;
}
// end bar.c
in a.cc,
#include <stdint.h>
#include <cstdio>
extern "C" int bar1();
void foo()
{
t...
unable to copy/paste in mingw shell
...
[Alternative] For MINGW64 (mintty 2.7.9) terminal in Windows 10, you can enable "Ctrl+Shift+letter shortcuts" to perform copy with (Ctrl+Shift+c) and paste with (Ctrl+Shift+v).
To enable the feature:
right-click command window
Click on 'Keys'
C...
When do I use the PHP constant “PHP_EOL”?
...uses "\n". Someone should file a bug report...
– imgx64
Jan 28 '12 at 7:32
28
@imgx64 Yeah maybe,...
How to convert integer to string in C? [duplicate]
...bits for int. When using numbers with greater bitsize, e.g. long with most 64-bit compilers, you need to increase the array size—at least 21 characters for 64-bit types.
share
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improve this answe...
How to convert an array of strings to an array of floats in numpy?
...port numpy as np
a = ["1.1", "2.2", "3.2"]
b = np.asarray(a, dtype=np.float64, order='C')
For Python 2*:
print a, type(a), type(a[0])
print b, type(b), type(b[0])
resulting in:
['1.1', '2.2', '3.2'] <type 'list'> <type 'str'>
[1.1 2.2 3.2] <type 'numpy.ndarray'> <type 'num...
What's the advantage of a Java enum versus a class with public static final fields?
...
casablancacasablanca
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...