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What is the memory consumption of an object in Java?

...compiler might decide to store a boolean[] in 64-bit long chunks like a BitSet. It does not have to tell you, so long as the program gives the same answers. It might allocate some temporary Objects on the stack. It may optimize some variables or method calls totally out of existence repla...
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Assigning a variable NaN in python without numpy

...o similar checks with complex numbers, the cmath module contains a similar set of functions and constants as the math module: cmath.isnan(...) cmath.isinf(...) cmath.isfinite(...) (Python 3.2+) cmath.nan (Python 3.6+; equivalent to complex(float('nan'), 0.0)) cmath.nanj (Python 3.6+; equivalent to...
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How to write a foreach in SQL Server?

... seem to want to use a CURSOR. Though most of the times it's best to use a set based solution, there are some times where a CURSOR is the best solution. Without knowing more about your real problem, we can't help you more than that: DECLARE @PractitionerId int DECLARE MY_CURSOR CURSOR LOCAL STA...
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When to use , tag files, composite components and/or custom components?

...osite components, because of the lack of support in the standard/available set of components. Examples can be found over all place in source code of open source component libraries such as PrimeFaces and OmniFaces. Tag handlers When you want to control the building of the JSF component tree instead ...
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Is it possible to reopen a closed branch in Mercurial?

...d.To get this to work I had to update to the branch before the close changeset (effectively the parent) and then update to the close changeset. Odd thing is, when you update to the parent, TortoiseHg claims the close changeset (the descendant) is the parent. Whatever, it works just fine once you jum...
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What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?

... editor after snippets, if snippets enabled if (StackExchange.settings.snippets.snippetsEnabled) { StackExchange.using("snippets", function() { createEditor(); }); } else { createEditor(); ...
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Syntax for creating a two-dimensional array

Consider: 12 Answers 12 ...
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Max length for client ip address [duplicate]

...maximum size for a database column storing client ip addresses? I have it set to 16 right now, but could I get an ip address that is longer than that with IPv6, etc? ...
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How to convert R Markdown to PDF?

... copy of pandoc through RStudio, I can use the following: Rscript -e "Sys.setenv(RSTUDIO_PANDOC='/Applications/RStudio.app/Contents/MacOS/pandoc');library(rmarkdown); library(utils); render('input.Rmd', 'pdf_document')" Old Answer (circa 2012) So, a number of people have suggested that Pandoc...
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git discard all changes and pull from upstream

...two things you can do here–you can reclone the remote repo, or you can reset --hard to the common ancestor and then do a pull, which will fast-forward to the latest commit on the remote master. To be concrete, here's a simple extension of Nevik Rehnel's original answer: git reset --hard origin/m...