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How to optimize for-comprehensions and loops in Scala?

So Scala is supposed to be as fast as Java. I'm revisiting some Project Euler problems in Scala that I originally tackled in Java. Specifically Problem 5: "What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?" ...
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Sending a notification from a service in Android

I have a service running, and would like to send a notification. Too bad, the notification object requires a Context , like an Activity , and not a Service . ...
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What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?

What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL? 6 Answers ...
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What is the Python equivalent of static variables inside a function?

What is the idiomatic Python equivalent of this C/C++ code? 26 Answers 26 ...
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Build tree array from flat array in javascript

I have a complex json file that I have to handle with javascript to make it hierarchical, in order to later build a tree. Every entry of the json has : id : a unique id, parentId : the id of the parent node (which is 0 if the node is a root of the tree) level : the level of depth in the tree ...
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How to get a number of random elements from an array?

I am working on 'how to access elements randomly from an array in javascript'. I found many links regarding this. Like: Get random item from JavaScript array ...
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how to use “AND”, “OR” for RewriteCond on Apache?

Is this how to use AND, OR for RewriteCond on Apache? 3 Answers 3 ...
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Gradient borders

I'm trying to apply a gradient to a border, I thought it was as simple as doing this: 17 Answers ...
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Matplotlib different size subplots

I need to add two subplots to a figure. One subplot needs to be about three times as wide as the second (same height). I accomplished this using GridSpec and the colspan argument but I would like to do this using figure so I can save to PDF. I can adjust the first figure using the figsize ar...
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Check variable equality against a list of values

I'm checking a variable, say foo , for equality to a number of values. For example, 13 Answers ...