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mongoDB/mongoose: unique if not null
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This answer did it for me too.
– Emmanuel N K
Dec 17 '18 at 2:46
1
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Specify custom Date format for colClasses argument in read.table/read.csv
...your data.
Edit ---
You might want to run setClass('myDate') first to avoid the warning (you can ignore the warning, but it can get annoying if you do this a lot and this is a simple call that gets rid of it).
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When do I need to use a semicolon vs a slash in Oracle SQL?
...one) tool to execute SQL scripts - and the "correctness" of a script is validated using that tool. Similar to having one compiler for your programming language or one specific version of your runtime environment (Java 7, .Net 4.0, PHP 5.x, ...)
– a_horse_with_no_name
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What's the difference between ngModel.$modelValue and ngModel.$viewValue
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Also not if the input is invalid the $modelValue won't be set. Ie, if you have <input ng-minlength="8"... > and you input is only 5 characters long, the $viewValue will show those 5 characters but $modelValue will not exist.
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Python Regex - How to Get Positions and Values of Matches
...ing 'a1b2c3d4' I'd want to get the positions where it finds each letter. Ideally, I'd like to get the text of the match back too.
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Sharing Test code in Maven
...hat m2eclipse and q4e both like it better).
<dependency>
<groupId>com.myco.app</groupId>
<artifactId>foo</artifactId>
<version>1.0-SNAPSHOT</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
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Use find command but exclude files in two directories
..../c/3
./e/a
./e/b
./e/5
You were pretty close, the -name option only considers the basename, where as -path considers the entire path =)
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follo...
How do I find if a string starts with another string in Ruby?
...ts 'abcdefg'.start_with?('abc') #=> true
[edit] This is something I didn't know before this question: start_with takes multiple arguments.
'abcdefg'.start_with?( 'xyz', 'opq', 'ab')
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How to cast int to enum in C++?
... just deduces the type automatically if you specify with "auto". If you decide to change your enum name in the future, you will be modifying your code less since compiler will automatically deduce the correct type name.
– Aydin Özcan
Dec 21 '19 at 14:35
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Is there a timeout for idle PostgreSQL connections?
...fix our connection leak. But meanwhile, we want to set a timeout for these idle connections, maybe max to 5 minute.
5 Answe...