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What is the memory consumption of an object in Java?

...en decide up front which one to call. Then of course the hardware and OS have multilayer caches, on chip-cache, SRAM cache, DRAM cache, ordinary RAM working set and backing store on disk. Your data may be duplicated at every cache level. All this complexity means you can only very roughly p...
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Parse string to DateTime in C#

I have date and time in a string formatted like that one: 8 Answers 8 ...
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FTP/SFTP access to an Amazon S3 Bucket [closed]

...o set up). Or you can mount the bucket to a file system on a Linux server and access the files using the SFTP as any other files on the server (which gives you greater control). Or you can just use a (GUI) client that natively supports S3 protocol (what is free). Managed SFTP Service In your...
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What are the differences between Deferred, Promise and Future in JavaScript?

What are the differences between Deferreds, Promises and Futures? Is there a generally approved theory behind all these three? ...
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What is the advantage to using bloom filters?

I am reading up on bloom filters and they just seem silly. Anything you can accomplish with a bloom filter, you could accomplish in less space, more efficiently, using a single hash function rather than multiple, or that's what it seems. Why would you use a bloom filter and how is it useful? ...
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What is the purpose of the single underscore “_” variable in Python?

...nt) in an interactive interpreter session. This precedent was set by the standard CPython interpreter, and other interpreters have followed suit As a general purpose "throwaway" variable name to indicate that part of a function result is being deliberately ignored (Conceptually, it is being discarde...
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Difference between single and double quotes in Bash

In Bash, what are the differences between single quotes ( '' ) and double quotes ( "" )? 6 Answers ...
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Is there a standard naming convention for XML elements? [closed]

Is there any standard, de facto or otherwise, for XML documents? For example which is the "best" way to write a tag? 13 Ans...
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Always pass weak reference of self into block in ARC?

...am a little confused about block usage in Objective-C. I currently use ARC and I have quite a lot of blocks in my app, currently always referring to self instead of its weak reference. May that be the cause of these blocks retaining self and keeping it from being dealloced ? The question is, sho...
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LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria

Consider the IEnumerable extension methods SingleOrDefault() and FirstOrDefault() 15 Answers ...