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Why functional languages? [closed]

I see a lot of talk on here about functional languages and stuff. Why would you use one over a "traditional" language? What do they do better? What are they worse at? What's the ideal functional programming application? ...
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How do Trigonometric functions work?

So in high school math, and probably college, we are taught how to use trig functions, what they do, and what kinds of problems they solve. But they have always been presented to me as a black box. If you need the Sine or Cosine of something, you hit the sin or cos button on your calculator and you'...
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Using success/error/finally/catch with Promises in AngularJS

I'm using $http in AngularJs, and I'm not sure on how to use the returned promise and to handle errors. 6 Answers ...
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“CAUTION: provisional headers are shown” in Chrome debugger

...r Latest Versions of chrome Type chrome://net-export/ in the address bar and hit enter. Start Recording. And save Recording file to local. Open the page that is showing problems. Go back to net-internals You can view Recorded Log file Here https://netlog-viewer.appspot.com/#import click on events ...
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Why is there a `null` value in JavaScript?

...pt, there are two values which basically say 'I don't exist' - undefined and null . 12 Answers ...
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What is JNDI? What is its basic use? When is it used?

... What is JNDI ? It stands for Java Naming and Directory Interface. What is its basic use? JNDI allows distributed applications to look up services in an abstract, resource-independent way. When it is used? The most common use case is...
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Creating a “logical exclusive or” operator in Java

Java has a logical AND operator. Java has a logical OR operator. Java has a logical NOT operator. 17 Answers ...
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Build android release apk on Phonegap 3.x CLI

How can I build an android app locally using the Phonegap 3.x CLI, ready to release? I check the bin folder generated inside the platforms/android directory of the project, and only has .debug APKs. ...
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Serving gzipped CSS and JavaScript from Amazon CloudFront via S3

I've been looking for ways of making my site load faster and one way that I'd like to explore is making greater use of Cloudfront. ...
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What is the difference between lemmatization vs stemming?

... Short and dense: http://nlp.stanford.edu/IR-book/html/htmledition/stemming-and-lemmatization-1.html The goal of both stemming and lemmatization is to reduce inflectional forms and sometimes derivationally related forms of a word t...