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Best way to represent a fraction in Java?
...on("Unknown format '" + s + "'");
}
// this translates 23.123e5 to 25,123 / 1000 * 10^5 = 2,512,300 / 1 (GCD)
String whole = m.group(1);
String decimal = m.group(2);
String exponent = m.group(3);
String n = whole;
// 23.123 => 23123
...
What is the meaning and difference between subject, user and principal?
...clarify "User - subset of principal"? If John is the subject and "account #123" is his principal, the user is who? Are there two John's? Since Genus > Species > Individual is increasingly specific, John (user) should be more specific than John (subject). Or am I missing something?
...
Is there a function that returns the current class/method name? [duplicate]
In C#, is there a function that returns the current class/method name?
6 Answers
6
...
static const vs #define
...uld be very like to see a comparison table.
– Unknown123
Apr 25 '19 at 3:49
2
...
^M at the end of every line in vim
....vimrc file and :source ~/.vimrc
" then you can do: Dos2Unix
" dos2unix ^M
fun! Dos2unixFunction()
let _s=@/
let l = line(".")
let c = col(".")
try
set ff=unix
w!
"%s/\%x0d$//e
catch /E32:/
echo "Sorry, first save the file."
endtry
let @/=_...
How to handle AccessViolationException
...rogram
{
static void InvokeCse()
{
IntPtr ptr = new IntPtr(123);
System.Runtime.InteropServices.Marshal.StructureToPtr(123, ptr, true);
}
private static void ExecInThisDomain()
{
try
{
var o = new BoundaryLessExecHelper();
...
java : convert float to String and String to float
... say this is the least effective method and the worse coding practice but, fun to use,
float val=10.0;
String str=val+"";
the empty quotes, add a null string to the variable str, upcasting 'val' to the string type.
share
...
Undo a merge by pull request?
...om.com>
Date: Mon Apr 29 06:12:38 2013 -0700
Merge pull request #123 from john/foo_and_bar
Add foo and bar
commit a507888e9fcc9e08b658c0b25414d1aeb1eef45e
Author: John Doe <john@doe.com>
Date: Mon Apr 29 12:13:29 2013 +0000
Add bar
commit 470ee0f407198057d5cb1d6427bb837...
What's the difference between equal?, eql?, ===, and ==?
...s-specific meaning.
This is the most common comparison, and thus the most fundamental place where you (as the author of a class) get to decide if two objects are "equal" or not.
=== — case equality
For class Object, effectively the same as calling #==, but typically overridden by descendants to ...
Your build failed due to an error in the AAPT stage, not because of an...
...文导致的，换成英文的就ok，这个问题先记录下来，后续fun23.cn平台可以解决。
----------------以下是参考资料-----------
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