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How do you rotate a two dimensional array?

...eed this information in our function to rotate a matrix, so let’s add it now: def rotate(matrix): size = len(matrix) # Rotatable layers only. layer_count = size / 2 Now we know what layers are and how to determine the number of layers that actually need rotating, how do we isolate a...
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Using Razor within JavaScript

...cript"> // Some JavaScript code here to display map, etc. // Now add markers @foreach (var item in Model) { <text> var markerlatLng = new google.maps.LatLng(@(Model.Latitude), @(Model.Longitude)); var title = '@(Model.Title)'; var d...
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What is causing this ActiveRecord::ReadOnlyRecord error?

... answered. I actually discovered I could remove a join from that query, so now the working query is 6 Answers ...
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URL rewriting with PHP

...e - redirect anything else to index.php index.php Because everything is now redirected to index.php, there will be determined if the url is correct, all parameters are present, and if the type of parameters are correct. To test the url we need to have a set of rules, and the best tool for that i...
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C multi-line macro: do/while(0) vs scope block [duplicate]

...) foo(a); else bar(a); where 'foo' and 'bar' are ordinary functions. Now imagine that you'd like to replace function 'foo' with a macro of the above nature if (<condition>) CALL_FUNCS(a); else bar(a); Now, if your macro is defined in accordance with the second approach (just { and...
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Fastest way to determine if an integer is between two integers (inclusive) with known sets of values

...does a comparison of resulting assembler and profiling info). For all we know, the OP's compiler may render the OP's code with a single branch opcode... – Oliver Charlesworth Jun 13 '13 at 19:50 ...
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How to print time in format: 2009‐08‐10 18:17:54.811

... It's an even better answer now, and props for looking up how to handle the millisecond part. I think your buffer is now a little longer than it needs to be, though. – Jack Kelly Sep 9 '10 at 3:56 ...
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How can I get the console logs from the iOS Simulator?

...Then run the simulator. EDIT: This stopped working on Mavericks/Xcode 5. Now you can access the simulator logs in its own folder: ~/Library/Logs/iOS Simulator/<sim-version>/system.log You can either use the Console.app to see this, or just do a tail (iOS 7.0.3 64 bits for example): tail -f...
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How to determine when Fragment becomes visible in ViewPager

...ibrary update (rev 11), the user visible hint issue is finally fixed. It's now safe to use user visible hint for ViewPager. – Oasis Feng Nov 14 '12 at 3:05 59 ...
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How do you use the ? : (conditional) operator in JavaScript?

...sion where an if...else statement would be awkward. For example: var now = new Date(); var greeting = "Good" + ((now.getHours() > 17) ? " evening." : " day."); The example creates a string containing "Good evening." if it is after 6pm. The equivalent code using an if...else state...