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MySQL: What's the difference between float and double?
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Float has 32 bit (4 bytes) with 8 places accuracy.
Double has 64 bit (8 bytes) with 16 places accuracy.
If you need better accuracy, use Double instead
of Float.
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How to hash some string with sha256 in Java?
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Jon SkeetJon Skeet
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.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
...ration: again, linked here) - though this is a result compounded by the 64-bit machine. This difference really demonstrates two things: first (1), a boxed Int32-type "object" (ArrayList) is much bigger than a pure Int32 primitive type (List); second (2), the difference is exponential as a result of ...
PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
...og($range, 2));
$bytes = (int) ($log / 8) + 1; // length in bytes
$bits = (int) $log + 1; // length in bits
$filter = (int) (1 << $bits) - 1; // set all lower bits to 1
do {
$rnd = hexdec(bin2hex(openssl_random_pseudo_bytes($bytes)));
$rnd = $rnd & $filter; ...
How do I use Notepad++ (or other) with msysgit?
...d++/notepad++.exe' -multiInst -notabbar -nosession -noPlugin"
Or, for 64-bit Windows and a 32-bit install of Notepad++:
git config --global core.editor "'C:/Program Files (x86)/Notepad++/notepad++.exe' -multiInst -notabbar -nosession -noPlugin"
Or, the following can be issued on the command lin...
Markup XML解析库下载（Markup.h 和 Markup.cpp） - 源码下载 - 清泛网 - 专注C/C++及内核技术
...ONV, falls back to setlocale based conversion for ANSI
//
#if _MSC_VER > 1000 // VC++
#pragma once
#if ! defined(MARKUP_SAFESTR) // not VC++ safe strings
#pragma warning(disable:4996) // VC++ 2005 deprecated function warnings
#endif // not VC++ safe strings
#if defined(MARKUP_STL) && _MSC_VER...
Difference between decimal, float and double in .NET?
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Another difference: float 32-bit; double 64-bit; and decimal 128-bit.
– David
Aug 29 '16 at 15:08
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Calling Java from Python
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I have tried Pyjnius/Jnius, JCC, javabridge, Jpype and Py4j.
Py4j is a bit hard to use, as you need to start a gateway, adding another layer of fragility.
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usr/bin/ld: cannot find -l
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edited Jan 10 '17 at 15:59
Kevin Panko
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Setting the filter to an OpenFileDialog to allow the typical image formats?
...an example of the ImageCodecInfo suggestion (in VB):
Imports System.Drawing.Imaging
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Dim ofd as new OpenFileDialog()
ofd.Filter = ""
Dim codecs As ImageCodecInfo() = ImageCodecInfo.GetImageEncoders()
Dim sep As String = String.Empty
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