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Performance of Arrays vs. Lists

...sy to measure... In a small number of tight-loop processing code where I know the length is fixed I use arrays for that extra tiny bit of micro-optimisation; arrays can be marginally faster if you use the indexer / for form - but IIRC believe it depends on the type of data in the array. But unless ...
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Javascript reduce on array of objects

...: 2 }, { age: 8 }] .reduce((total, thing) => total + thing.age, 0); Now we're giving a starting value to the aggregator. The starting value should be the type that you expect the aggregator to be (the type you expect to come out as the final value), in the vast majority of cases. While you ar...
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Is it possible to make a type only movable and not copyable?

... the marker types is preferred if the destructor is doing nothing. Types now move by default, that is, when you define a new type it doesn't implement Copy unless you explicitly implement it for your type: struct Triplet { one: i32, two: i32, three: i32 } impl Copy for Triplet {} // a...
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Error: The 'brew link' step did not complete successfully

... The homebrew package for node.js now includes npm again, so this happened to me when I missed the homebrew package's message about removing the standalone version first. Assuming, like me, you've already broken node/npm by attempting the upgrade before kno...
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Can you do a partial checkout with Subversion?

...ew_update_path, leaf_segment) if options.verbose: print "Will now update with 'recursive':", new_update_path update_revision_list = client.update(new_update_path) if options.verbose: for revision in update_revision_list: print "- Finished updating %s to revi...
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How does Bluebird's util.toFastProperties function make an object's properties “fast”?

...object->HasFastProperties()) { MigrateSlowToFast(object, 0); } } Now, JSObject::MigrateSlowToFast just explicitly takes the Dictionary and converts it into a fast V8 object. It's a worthwhile read and an interesting insight into v8 object internals - but it's not the subject here. I still ...
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Codesign error: Provisioning profile cannot be found after deleting expired profile

...om iTunes. When I chose a new profile (one with an * in the identifier), I now get an error: 16 Answers ...
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Correct way to pause Python program

... I know about the sleep function in the time module but what if I have a long block of text I want the user to read? – RandomPhobia Jul 19 '12 at 0:34 ...
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Get selected element's outer HTML

...reply are from 2010. At the time, no better solution was widely available. Now, many of the other replies are better : Eric Hu's, or Re Capcha's for example. This site seems to have a solution for you : jQuery: outerHTML | Yelotofu jQuery.fn.outerHTML = function(s) { return s ? this.be...
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org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for

... @Arthur Ronald F D Garcia: Thanks, it worked great. But, the program is now stopped by new one. object references an unsaved transient instance - save the transient instance before flushing Do you aware of this error. If not just leave it. I am searching. – user405398 ...