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Automatic Retina images for web sites

With the new Apple MacBook Pro with retina display, if you provide a "standard" image on your website, it'll be a little fuzzy. So you have to provide a retina image. ...
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Design Patterns: Factory vs Factory method vs Abstract Factory

I was reading design patterns from a website 7 Answers 7 ...
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How to configure Eclipse build path to use Maven dependencies?

...pendencies in a project. My brief understanding of how Maven works is that it will aquire the JARs needed and then build the project with these libraries. ...
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Using python's eval() vs. ast.literal_eval()?

I have a situation with some code where eval() came up as a possible solution. Now I have never had to use eval() before but, I have come across plenty of information about the potential danger it can cause. That said, I'm very wary about using it. ...
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Cleanest way to build an SQL string in Java

...above query: update_query=UPDATE user_table SET name=? WHERE id=? Then with the help of a simple utility class: public class Queries { private static final String propFileName = "queries.properties"; private static Properties props; public static Properties getQueries() throws SQLE...
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How to use JUnit to test asynchronous processes

How do you test methods that fire asynchronous processes with JUnit? 17 Answers 17 ...
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How do I parse an ISO 8601-formatted date?

...uestion, but also other ISO 8601 date and time strings that don't comply with RFC 3339 (such as ones with no UTC offset, or ones that represent only a date). >>> import dateutil.parser >>> dateutil.parser.isoparse('2008-09-03T20:56:35.450686Z') # RFC 3339 format datetime.datetime...
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The simplest way to comma-delimit a list?

What is the clearest way to comma-delimit a list in Java? 30 Answers 30 ...
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Add a tooltip to a div

... For the basic tooltip, you want: <div title="This is my tooltip"> For a fancier javascript version, you can look into: https://jqueryhouse.com/best-jquery-tooltip-plugins/ The above link gives you 25 options for tooltips. ...
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Is there “0b” or something similar to represent a binary number in Javascript

...inary (prefix 0b), octal (prefix 0o) and hexadecimal (prefix: 0x) numeric literals: var bin = 0b1111; // bin will be set to 15 var oct = 0o17; // oct will be set to 15 var oxx = 017; // oxx will be set to 15 var hex = 0xF; // hex will be set to 15 // note: bB oO xX are all valid...