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Disable Required validation attribute under certain circumstances
... following view models:
public UpdateViewView
{
[Required]
public string Id { get; set; }
... some other properties
}
public class InsertViewModel
{
public string Id { get; set; }
... some other properties
}
which will be used in their corresponding controller actions:
[Ht...
What is the purpose of setting a key in data.table?
...due to data.table's internal radix sorting) and memory efficient (only one extra column of type double is allocated).
When is setkey() required?
For grouping operations, setkey() was never an absolute requirement. That is, we can perform a cold-by or adhoc-by.
## "cold" by
require(data.table)
DT...
How do I log a Python error with debug information?
... problem is that traceback lines could have \n inside, so we need to do an extra work to get rid of this line endings:
import logging
logger = logging.getLogger('your_logger_here')
def log_app_error(e: BaseException, level=logging.ERROR) -> None:
e_traceback = traceback.format_exception(e...
What's wrong with this 1988 C code?
...colon after the 1 and the 0, when IN and OUT got replaced in the code, the extra semicolon after the number produced invalid code, for instance this line:
else if (state == OUT)
Ended up looking like this:
else if (state == 0;)
But what you wanted was this:
else if (state == 0)
Solution: re...
What is the best way to deal with the NSDateFormatter locale “feechur”?
...
what will be the date formatter for "NSString *dateStr = @"2014-04-05T04:00:00.000Z";" ?
– Agent Chocks.
May 22 '14 at 11:59
...
What is the use case of noop [:] in bash?
...can discover that : ignores them. Mostly, you are just making the shell do extra work in expanding * to a list of files in the current directory; it won't actually affect how the script works.
– chepner
Nov 5 '14 at 14:48
...
How to show the text on a ImageButton?
...p_content"
android:background="@drawable/button_bg"
android:text="@string/login_string" />
I just had this issue and is working perfectly.
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Check if a given key already exists in a dictionary
...
this also avoids an extra allocation. (important for making tight loops a bit faster)
– nurettin
Dec 9 '18 at 9:19
add a...
Managing Sessions in Node.js? [closed]
...chalabs.github.com/connect/
Connects is like Rack in Ruby. It gives you an extra layer where you can "play" with authentication, sessions, cookies, among others.
Other option is to use frameworks:
Express.js: http://expressjs.com/
It seems to be the most used node.js framework. Is like Sinatra fo...
How to strike through obliquely with css
...e a border, then rotate it with a CSS transform. Doing it this way adds no extra elements to the DOM, and adding/removing the strikethrough is a simple as adding/removing the class.
Here's a demo
Caveats
This will only work down to IE8. IE7 does not support :before, however will degrade graceful...