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Difference between java.util.Random and java.security.SecureRandom
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The standard Oracle JDK 7 implementation uses what's called a Linear Congruential Generator to produce random values in java.util.Random.
Taken from java.util.Random source code (JDK 7u2), from a comment on the method protected int next(int bits), which is the one that gener...
MFC的多国语言界面的实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
...:OnClose()
{
// TODO: Add your message handler code here and/or call default
// 判断是否需要重新启动窗口
if (m_bRestartFlag)
{
CString strFileName = _T("");
GetModuleFileName(NULL, strFileName.GetBuffer(MAX_...
sqlalchemy: how to join several tables by one query?
...ording the relations, and the yield 3-tuples. The arguments to the query() call are essentially the select list in sqlalchemy.
– letitbee
Jan 17 '14 at 18:53
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Why is this program valid? I was trying to create a syntax error
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Perl has a syntax called "indirect method notation". It allows
Foo->new($bar)
to be written as
new Foo $bar
So that means
Syntax error ! exit 0;
is the same as
error->Syntax(! exit 0);
or
error->Syntax(!exit(0));
Not on...
Javascript infamous Loop issue? [duplicate]
... {
// A functions variable values are set WHEN THE FUNCTION IS CALLED!
// PLEASE UNDERSTAND THIS AND YOU ARE HOME AND DRY (took me 2 years)!
// Now the click event is expecting a function as a handler so return it
return function() { alert (num) }
...
How to add Action Bar from support library into PreferenceActivity?
...anks, this works for me - i'd change new LinearLayout in the first inflate call to: (ViewGroup) getWindow().getDecorView().getRootView()
– ahmedre
Nov 5 '14 at 7:47
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Labels for radio buttons in rails form
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If you want the object_name prefixed to any ID you should call form helpers on the form object:
- form_for(@message) do |f|
= f.label :email
This also makes sure any submitted data is stored in memory should there be any validation errors etc.
If you can't call the form helper...
jQuery: checking if the value of a field is null (empty)
...f you want to check if the element exist at all, you should do that before calling val:
var $d = $('#person_data[document_type]');
if ($d.length != 0) {
if ($d.val().length != 0 ) {...}
}
share
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cancelling queued performSelector:afterDelay calls
...r stack (or whatever mechanism it is that is utilized by the API) when you call performSelector:withObject:afterDelay ?
4 ...
jQuery AJAX file upload PHP
...what you want to name it
// in this case we are putting in a directory called "uploads"
// and giving it the original filename
'uploads/' . $_FILES['file']['name']
);
$_FILES['file']['name'] is the name of the file as it is uploaded. You don't have to use that. You can give the file an...