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What is a None value?

...itten on it, and it can only be on one object at a time, but you could put more than one sticker on the same object, if you wanted to. When you write F = "fork" you put the sticker "F" on a string object "fork". If you then write F = None you move the sticker to the None object. What Briggs...
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Replacing NULL with 0 in a SQL server query

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Using npm behind corporate proxy .pac

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Generating file to download with Django

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What does the question mark and the colon (?: ternary operator) mean in objective-c?

...the left side is an expression, as the ?: prevents it from being evaluated more than once. For example: [myArray firstObject] ? [myArray firstObject] : @"Hello World"; calls firstObject twice (if firstObject does not return nil), where [myArray firstObject] ?: @"Hello World"; produces the identical...
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How to switch a user per task or set of tasks?

...d Users for some additional examples and Become (Privilege Escalation) for more detailed documentation. In addition to the task-scoped become and become_user directives, Ansible 1.9 added some new variables and command line options to set these values for the duration of a play in the absence of ex...
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Gradle - getting the latest release version of a dependency

...the plugin versions, cause for Maven 3 it does not allow RELEASE/LATEST anymore. But it's of course bad practice to use such version identifiers. – khmarbaise Apr 29 '12 at 14:26 ...
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How does the following LINQ statement work?

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Simple way to encode a string according to a password?

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Difference between jar and war in Java

... and a .war file? Is it only the file extension or is there something more? 13 Answers ...