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JavaScript checking for null vs. undefined and difference between == and ===
...perands are of different types, === will always return false while == will convert one or both operands into the same type using rules that lead to some slightly unintuitive behaviour. If the operands are of the same type (e.g. both are strings, such as in the typeof comparison above), == and === wi...
Iterate over model instance field names and values in template
...ts have changed slightly. A migration guide has been provided to assist in converting your code to use the new, official API.
In the below example, we will utilize the formalized method for retrieving all field instances of a model via Client._meta.get_fields():
fields = [(f.verbose_name, f.name) f...
How to add a button to PreferenceScreen
Is there any way to add a button to the bottom of preferences screen and make them work correct when scrolling?
12 Answers
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Create a dictionary on a list with grouping
...ion that you want to search by. The trick is to create a grouping and then convert it to a dictionary, as follows:
Dim qry = (From acs In ActualSales _
Group By acs.ProductID Into Group _
Select ProductID, Months = Group.ToDictionary(Function(c) c.Period) _
)...
How to change href of tag on button click through javascript
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no href makes it an anchor, click converts to a link, pretty normal
– Free Consulting
Dec 6 '10 at 12:07
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How to use WPF Background Worker
...gress (optional, but often useful)
a) subscribe to ProgressChanged event and use ReportProgress(Int32) in DoWork
b) set worker.WorkerReportsProgress = true; (credits to @zagy)
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Razor View Engine : An expression tree may not contain a dynamic operation
...s was my problem. If you're not watching carefully, Visual Studio tends to convert what you're typing into the capital "M". It's really irritating.
– RobbieE
Jan 24 '17 at 12:43
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Returning value that was passed into a method
... me: The string in .Returns<string> refers to the input parameter(s) and not the values you are returning.
– Jim
Jul 31 '15 at 15:13
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Set Viewbag before Redirect
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I would like to complete the answer because I am using it and I faced a small problem that is when the TempData is empty for some reason (in my case I only have a message when a conversion is made). So I had to had the test if(TempData["Message"] != null) to avoid an error.
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What is the shortest way to pretty print a org.w3c.dom.Document to stdout?
...ew OutputStreamWriter(out, "UTF-8")));
}
(The indent-amount is optional, and might not work with your particular configuration)
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