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Submitting a form by pressing enter without a submit button
... when CSS is disabled.
Update - Workaround for IE7
As suggested by Bryan Downing + with tabindex to prevent tab reach this button (by Ates Goral):
<input type="submit"
style="position: absolute; left: -9999px; width: 1px; height: 1px;"
tabindex="-1" />
...
When do Java generics require
...ch as List<Date> or Map<K, V> as in the example) is to force a downcast and to have the compiler guarantee that this is safe (no runtime exceptions).
Consider the case of List. The essence of my question is why a method that takes a type T and a List won't accept a List of something fur...
DbEntityValidationException - How can I easily tell what caused the error?
...idationException)ex).EntityValidationErrors
This will allow you to drill down into the ValidationErrors tree. It's the easiest way I've found to get instant insight into these errors.
For Visual 2012+ users who care only about the first error and might not have a catch block, you can even do:
((...
Converting int to bytes in Python 3
...you can do
>>> (1024).to_bytes(2, byteorder='big')
b'\x04\x00'
https://docs.python.org/3/library/stdtypes.html#int.to_bytes
def int_to_bytes(x: int) -> bytes:
return x.to_bytes((x.bit_length() + 7) // 8, 'big')
def int_from_bytes(xbytes: bytes) -> int:
return int.from_byt...
Uses for Optional
...ways, but using Optional in fields potentially bloats memory use and slows down data structure traversal. And finally I think it clutters up code, but this is a matter of taste.
– Stuart Marks
May 20 '16 at 0:35
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Finding ALL duplicate rows, including “elements with smaller subscripts”
...
Agree. Might even slow down processing but unlikely to slow it down very much.
– IRTFM
Jun 21 '18 at 14:42
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Simple Pivot Table to Count Unique Values
...rmula
=IF(SUMPRODUCT(($A$2:$A2=A2)*($B$2:$B2=B2))>1,0,1)
and copy it down. Now create your pivot based on 1st and 3rd column. See snapshot
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Shortest distance between a point and a line segment
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The check for line segments of length 0 is too far down in the code. 'len_sq' will be zero and the code will divide by 0 before it gets to the safety check.
– HostedMetrics.com
Aug 21 '14 at 14:33
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Eclipse: All my projects disappeared from Project Explorer
...ta data had become corrupted, probably due to Eclipse being improperly shutdown. The solution, as explained here, is to:
Note, steps 2 & 3 are optional if Eclipse isn't crashing, but just not showing any projects.
Close Eclipse.
cd /home/user/workspace/.metadata/.plugins
mv org.eclipse.core....
How do you know what to test when writing unit tests? [closed]
...he simple payment.
Both tests should pass of course.
Then I worked my way down to the more complex scenarios.
1) Think of a new scenario
2) Write a test for that scenario
3) Run that single test to see if it would pass
4) If it didn't I'd debug and modify the code until it would pass.
5) W...