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What do two question marks together mean in C#?

...evaluated once. This is important if for example an expression is a method call with side effects. (Credit to @Joey for pointing this out.) share | improve this answer | foll...
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Append integer to beginning of list in Python [duplicate]

... original list? It could be an argument to a function for instance and the caller doesn't expect the list to be modified and it would introduce an error into the program to do so. – BlackJack Oct 19 '16 at 12:50 ...
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Graphviz: How to go from .dot to a graph?

...extension after -o. If you're using windows, check out the installed tool called GVEdit, it makes the whole process slightly easier. Go look at the graphviz site in the section called "User's Guides" for more detail on how to use the tools: http://www.graphviz.org/documentation/ (See page 27 fo...
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Get decimal portion of a number with JavaScript

... If you already have the integer portion, there's no need to call Math.floor() again -- just use the integer portion that you've calculated. – tvanfosson Dec 22 '10 at 18:29 ...
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Converting string from snake_case to CamelCase in Ruby

... Note that classify returns a string, you have to call constantize afterwards to convert it to an actual class. – Stefan May 31 '16 at 9:33 1 ...
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How do I measure time elapsed in Java? [duplicate]

... @entropy - sure; basically some implementations of nanoTime on some versions of OS/Java/CPU will use hardware CPU time stamp counter (TSC) . However this TSC may not be the same between cores/processors. If your thread is rescheduled to a differe...
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Run JavaScript code on window close or page refresh?

...; does the same (i.e. prevents the default behavior) and it is more semantically correct. – collimarco Sep 24 '13 at 15:12 1 ...
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Eloquent Collection: Counting and Detect Empty

...ou’re working on. The Query Builder essentially builds a query until you call a method where it will execute the query and hit the database (e.g. when you call certain methods like ->all() ->first() ->lists() and others). Those methods also exist on the Collection object, which can get re...
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How to list active / open connections in Oracle?

Is there any hidden table, system variable or something to show active connections in a given moment? 9 Answers ...
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See all breakpoints in Visual Studio 2010+

... var channelOptions = { tags: "".split(" "), id: "1" }; initTagRenderer("".split(" "), "".split(" "), channelOptions); StackExchange.using("externalEditor", function() { // Have to fire editor after snippets, if snippets enabled...