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Convert JS Object to form data
... understand why a hasOwnProperty check is used, just saying things are considered "best practice" because you read someone's (guessing, Crockford's) book doesn't get you very far, trying to educate a fellow So member with more than 100 times the reputation and 100 times the number of answers you hav...
Best way to check if a Data Table has a null value in it
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I will do like....
(!DBNull.Value.Equals(dataSet.Tables[6].Rows[0]["_id"]))
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Rails detect if request was AJAX
...TTP_X_REQUESTED_WITH'] =~ /XMLHttpRequest/ => 0
The docs:
http://apidock.com/rails/v4.2.1/ActionDispatch/Request/xml_http_request%3F
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Is there a cross-browser onload event when clicking the back button?
...ase read those articles (or my summary in a separate answer below) and consider whether you really need to do this and make your page load slower for your users.]
Can't believe it? Try this:
<body onunload=""><!-- This does the trick -->
<script type="text/javascript">
alert(...
How can I create a “Please Wait, Loading…” animation using jQuery?
.../ajaxload.info
I'll be using
Let's create an element that we can show/hide anytime we're making an ajax request:
<div class="modal"><!-- Place at bottom of page --></div>
The CSS
Next let's give it some flair:
/* Start by setting display:none to make this hidden.
Then w...
PostgreSQL: Can you create an index in the CREATE TABLE definition?
... answered Jun 4 '11 at 22:04
ridrid
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Invoking JavaScript code in an iframe from the parent page
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Assume your iFrame's id is "targetFrame" and the function you want to call is targetFunction():
document.getElementById('targetFrame').contentWindow.targetFunction();
You can also access the frame using window.frames instead of document.getEle...
Remove scroll bar track from ScrollView in Android
My Android app has a main WebView (HTML loaded from a local resource) which I want to use the entire width of the screen and be able to make (vertically) scrollable. So I've wrapped the WebView in a ScrollView in my layout XML, but no matter what I do I can't seem to be able to remove the scroll bar...
Entity Framework code first unique column
...work Code First:
Column 'x' in table 'dbo.y' is of a type that is invalid for use as a key column in an index.
The reason is because of this:
SQL Server retains the 900-byte limit for the maximum total size of all index key columns."
(from: http://msdn.microsoft.com/en-us/library/ms19124...
C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
... policy.
On Unix-like operating systems, a process that accesses invalid memory receives the SIGSEGV signal. On Microsoft Windows, a process that accesses invalid memory receives the STATUS_ACCESS_VIOLATION exception.
另外，这里有个基本上对照的中文解释，来自ht...