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Algorithm to generate a crossword

... I came up with a solution which probably isn't the most efficient, but it works well enough. Basically: Sort all the words by length, descending. Take the first word and place it on the board. Take the next word. Search through all th...
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Auto margins don't center image in page

... add display:block; and it'll work. Images are inline by default To clarify, the default width for a block element is auto, which of course fills the entire available width of the containing element. By setting the margin to auto, the browser assi...
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How to get an array of unique values from an array containing duplicates in JavaScript? [duplicate]

... Edited ES6 solution: [...new Set(a)]; Alternative: Array.from(new Set(a)); Old response. O(n^2) (do not use it with large arrays!) var arrayUnique = function(a) { return a.reduce(function(p, c) { if (p.index...
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Regex empty string or email

...l accept an empty string. Is this possible through Regex only? Accepting either empty string or email only? I want to have this on Regex only. ...
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When to use StringBuilder in Java [duplicate]

It is supposed to be generally preferable to use a StringBuilder for string concatenation in Java. Is this always the case? ...
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Cannot push to Git repository on Bitbucket

I created a new repository and I'm running into a strange error. I've used Git before on Bitbucket but I just reformatted and now I can't seem to get Git to work. After doing a commit, I had to add my email and name to the globals, but then it committed just fine. ...
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how to remove X-Powered-By in ExpressJS [duplicate]

I want to remove X-Powered-By for Security,Save Bandwidth in ExpressJS(node.js). how to do it? it could be filter(app.use) ? ...
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C# 4 default parameter values: How to assign a default DateTime/object value? [duplicate]

... DateTime cannot be used as a constant but you could make it a nullable type (DateTime?) instead. Give the DateTime? a default value of null, and if it is set to null at the start of your function, then you can initialize it to any value you want. static void test(DateTime? dt = n...
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Parsing huge logfiles in Node.js - read in line-by-line

... line using a stream. All the third-party libraries and examples did not suit my needs since they processed the files not line by line (like 1 , 2 , 3 , 4 ..) or read the entire file to memory The following solution can parse very large files, line by line using stream & pipe. For testing I use...
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What is the difference between task and thread?

...id some sample program(help taken from MSDN) for my own sake of learning with 8 Answers ...