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Quick-and-dirty way to ensure only one instance of a shell script is running at a time

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Round a double to 2 decimal places [duplicate]

If the value is 200.3456 , it should be formatted to 200.34 . If it is 200 , then it should be 200.00 . 13 Answers ...
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Regular expression to find URLs within a string

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Comparing numbers in Bash

... Gabriel Staples 7,26633 gold badges4848 silver badges7777 bronze badges answered Sep 7 '13 at 0:48 jordanmjordanm ...
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Alternate background colors for list items

... 293 How about some lovely CSS3? li { background: green; } li:nth-child(odd) { background: red; } ...
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Can't find @Nullable inside javax.annotation.*

...pId> <artifactId>jsr305</artifactId> <version>3.0.2</version> </dependency> and for Gradle: dependencies { testImplementation 'com.google.code.findbugs:jsr305:3.0.2' } share ...
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Int or Number DataType for DataAnnotation validation attribute

... 222 For any number validation you have to use different different range validation as per your req...
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How can I list all tags in my Git repository by the date they were created?

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PHP function to make slug (URL string)

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What is a Portable Class Library?

... UPDATE Oct 9 2017: Article comparing/constrasting .NET Core/Std/PCL UPDATE Nov 23 2016: Article by Rick Strahl UPDATE Oct 29 2016: .NETStandard 1->2 FAQ UPDATE Oct 19 2016: This is the best interview/video I've seen to date covering ....