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What is the “Execute Around” idiom?

...e Java as an example even though the pattern isn't platform-specific. The idea is that sometimes you have code that always involves the same boilerplate before you run the code and after you run the code. A good example is JDBC. You always grab a connection and create a statement (or prepared sta...
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How update the _id of one MongoDB Document?

...ed field. You could fix this by doing the delete first, but that is a bad idea because if your insert fails for some reason your data is now lost. You must instead drop your index, perform the work, then restore the index. – skelly Jun 2 '14 at 19:52 ...
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jQuery using append with effects

... @Vic as it happens .append() doesn't even take a selector string. The idea's still correct though. Thanks, updated. – Matt Ball Jan 8 '13 at 0:39 ...
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Limitations of SQL Server Express

...ose limitations - I'm only worried about the actual no. of databases - any idea about this? – Donniel Jul 23 '09 at 4:48 4 ...
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What is the JavaScript convention for no operation?

...ssarily a function you need to give, and giving it the noop name is a good idea so you're telling your readers (and that may be you in 6 months) that you purposely give an empty function. In the end, there's no such thing as "inferior" or "superior" code structure. You're either right or wrong in t...
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How to extract the decision rules from scikit-learn decision-tree?

...sing tree_.threshold == -2 to decide whether a node is a leaf isn't a good idea. What if it's a real decision node with a threshold of -2? Instead, you should look at tree.feature or tree.children_*. The line features = [feature_names[i] for i in tree_.feature] crashes with my version of sklearn, be...
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Can't find @Nullable inside javax.annotation.*

...If anyone has this issue when building a Maven project created in IntelliJ IDEA externally, I used the following dependency instead of the answer: <dependency> <groupId>org.jetbrains</groupId> <artifactId>annotations</artifactId> <version>15.0</version&g...
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When should one use final for method parameters and local variables?

...ot notice the benefits unless you use a truly modern Java IDE, though (ie, IDEA). – Rogério Jan 12 '10 at 1:44 10 ...
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Using a piano keyboard as a computer keyboard [closed]

... I haven't done any MIDI programming in years, but your fundamental idea is very sound (no pun). MIDI is a stream of "events" (or "messages"), two of the most fundamental being "note on" and "note off" which carry with them the note number (0 = C five octaves below middle C, through 127 = G ...
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How to call asynchronous method from synchronous method in C#?

...od is already running in that context. This is one reason why it's a good idea to use ConfigureAwait(false) within every async method as much as possible. Solution C AsyncContext.RunTask won't work in every scenario. For example, if the async method awaits something that requires a UI event to comp...