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Node / Express: EADDRINUSE, Address already in use - Kill server
... process crashes or is killed. It is only called when the event loop ends, and since server.close() sort of ends the event loop (it still has to wait for currently running stacks here and there) it makes no sense to put that inside the exit event...
On crash, do process.on('uncaughtException', ..) ...
Add a column to a table, if it does not already exist
... sys.columns
WHERE object_id = OBJECT_ID(N'[dbo].[Person]')
AND name = 'ColumnName'
)
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Is it okay to use now?
I'm working on a mobile phone web app and I have several text fields that could benefit from <input type="tel"/> . iPhones will adjust the keyboard for the user, but I'm worried about breaking backwards compatibility. What I'm hoping is that browsers/phone that support this can assist the use...
How to add new line into txt file
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No new line:
File.AppendAllText("file.txt", DateTime.Now.ToString());
and then to get a new line after OK:
File.AppendAllText("file.txt", string.Format("{0}{1}", "OK", Environment.NewLine));
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How does a ArrayList's contains() method evaluate objects?
Say I create one object and add it to my ArrayList . If I then create another object with exactly the same constructor input, will the contains() method evaluate the two objects to be the same? Assume the constructor doesn't do anything funny with the input, and the variables stored in both objec...
Responsive iframe using Bootstrap
...trap.com/docs/3.3/components/#responsive-embed
– Alexander Schmidt
Aug 24 '17 at 9:36
use one aspect ratio and include...
Why does Convert.ToString(null) return a different value if you cast null?
...e to any reference type. In this case string is more specific than object and hence it will be picked as the winner.
In the null as object you've solidified the type of the expression as object. This means it's no longer compatible with the string overload and the compiler picks the object over...
C# List of objects, how do I get the sum of a property
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And if you need to do it on items that match a specific condition...
double total = myList.Where(item => item.Name == "Eggs").Sum(item => item.Amount);
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How to select following sibling/xml tag using xpath
I have an HTML file (from Newegg) and their HTML is organized like below. All of the data in their specifications table is ' desc ' while the titles of each section are in ' name. ' Below are two examples of data from Newegg pages.
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Spring mvc @PathVariable
Can you give me a brief explanation and a sample in using @PathVariable in spring mvc? Please include on how you type the url?
I'm struggling in getting the right url to show the jsp page. Thanks.
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