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Hidden Features of C++? [closed]

... that it can be used as an lvalue: (a == 0 ? a : b) = 1; which is shorthand for if (a == 0) a = 1; else b = 1; Use with caution :-) share edited Jan 7 '09 at 21:...
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How to make rounded percentages add up to 100%

... There is aproblem with this function when the last element is 0 and previous ones add to 100. E.g. [52.6813880126183, 5.941114616193481, 24.55310199789695, 8.780231335436383, 8.04416403785489, 0]. The last one logically returns -1. I thought of the following solution really quickly but th...
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How to check command line parameter in “.bat” file?

... I need to have a ".bat" file where I need to check if user enters any command-line parameter or not. If does then if the parameter equals to -b then I will do something otherwise I will flag "Invalid input". If user does not enter any command-line parameter then I will do something. I have crea...
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Create an index on a huge MySQL production table without table locking

...ed to create an index on a ~5M rows MySQL table. It is a production table, and I fear a complete block of everything if I run a CREATE INDEX statement... ...
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Java Singleton and Synchronization

Please clarify my queries regarding Singleton and Multithreading: 8 Answers 8 ...
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Android static object lifecycle

...ulate in another screen then user can edit search criteria from 3rd screen and goes to 4th screen. 4 Answers ...
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Is ASCII code 7-bit or 8-bit?

...as a 7-bit code. This was done well before 8-bit bytes became ubiquitous, and even into the 1990s you could find software that assumed it could use the 8th bit of each byte of text for its own purposes ("not 8-bit clean"). Nowadays people think of it as an 8-bit coding in which bytes 0x80 through ...
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Is JSON Hijacking still an issue in modern browsers?

I am using Backbone.js and the Tornado web server. The standard behavior for receiving collection data in Backbone is to send as a JSON Array. ...
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What is the best Distributed Brute Force countermeasure?

...t is no secret that I am implementing an auth+auth system for CodeIgniter, and so far I'm winning (so to speak). But I've run into a pretty non-trivial challenge (one that most auth libraries miss entirely, but I insist on handling it properly): how to deal intelligently with large-scale, distribut...
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How to escape text for regular expression in Java

...se not that this doesn’t escape the string itself, but wraps it using \Q and \E. This may lead to unexpected results, for example Pattern.quote("*.wav").replaceAll("*",".*") will result in \Q.*.wav\E and not .*\.wav, as you might expect. – Matthias Ronge Jan ...