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When is “i += x” different from “i = i + x” in Python?

... the concatenated list in the current namespace as b -- With no regard for what b was the line before. 1In the expression x + y, if x.__add__ isn't implemented or if x.__add__(y) returns NotImplemented and x and y have different types, then x + y tries to call y.__radd__(x). So, in the case wher...
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How to configure Ruby on Rails with no database?

..., you must to load each library separately as follows: # active_record is what we're not going to use it, so comment it "just in case" # require "active_record/railtie" # This is not loaded in rails/all but inside active_record so add it if # you want your models work as expected require "active_...
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How to resize an image to fit in the browser window?

... What if we want to vertically center? – Fmstrat May 2 '18 at 20:57 ...
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Passing properties by reference in C#

...eter getOutput is unnecessary - true but I used it inside GetString to see what the value was that I was setting. Not sure how to do that without this parameter. – Petras Mar 24 '13 at 11:45 ...
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Why is subtracting these two times (in 1927) giving a strange result?

...43 second change (so the time between t and t+1 is 344 seconds, if you see what I mean). EDIT: To answer a question around a transition at 1900... it looks like the Java timezone implementation treats all time zones as simply being in their standard time for any instant before the start of 1900 UTC...
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Select TreeView Node on right click before displaying ContextMenu

... Great answer, thank you! It would be helpful to show what the i and ei namespace mappings resolve to though and which assemblies they can be found in. I assume: xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" and xmlns:ei="http://schemas.microsoft.com/expr...
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Is “else if” faster than “switch() case”? [duplicate]

...ou should write the most readable code even if the performance differs somewhat. If you need to optimise the code it may still make a difference. For the compiler to optimise the code the way that you describe, it has to have more knowledge about the value, i.e. knowing if reading the value multiple...
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Return multiple values in JavaScript?

...on't be fooled by the fact that ECMAScript allows you to return 1, 2, .... What really happens there is not what might seem. An expression in return statement — 1, 2, 3 — is nothing but a comma operator applied to numeric literals (1 , 2, and 3) sequentially, which eventually evaluates to the va...
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#ifdef vs #if - which is better/safer as a method for enabling/disabling compilation of particular s

...defined; whether they're not defined intentionally or because of a typo or what have you. – bames53 Jun 10 '13 at 21:19 6 ...
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Can anonymous class implement interface?

...lways run on a dedicated machine. Also, since we were using PostSharp, and what we were doing is fully legal within that framework, nothing could really go pop as long as we made sure PostSharp was installed on the build server we were using. – Mia Clarke Sep 2...