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Why is the Java main method static?

...ntire class - sometimes you have an instance that hasn't been initialized, and you have to check for it in every method that could be called. There are just too many edge cases and ambiguities for it to make sense for the JVM to have to instantiate a class before the entry point is called. That's ...
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How do I style a dropdown with only CSS?

...s very good browser support (caniuse) - except for Internet Explorer 11 (and later) and Firefox 34 (and later). We can improve this technique and add support for Internet Explorer 10 and Internet Explorer 11 by adding select::-ms-expand { display: none; /* Hide the default arrow in Interne...
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When is SQLiteOpenHelper onCreate() / onUpgrade() run?

... SQLiteOpenHelper onCreate() and onUpgrade() callbacks are invoked when the database is actually opened, for example by a call to getWritableDatabase(). The database is not opened when the database helper object itself is created. SQLiteOpenHelper versi...
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Practical uses of git reset --soft?

... git reset is all about moving HEAD, and generally the branch ref. Question: what about the working tree and index? When employed with --soft, moves HEAD, most often updating the branch ref, and only the HEAD. This differ from commit --amend as: it doesn't cre...
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“Public key certificate and private key doesn't match” when using Godaddy issued certificate [closed

... the web server to the new load balancer. Amazon requires the private key and certs to be in PEM format, so I used the "rekey" tool at GoDaddy to create new certs. When I load those in the load balancer setup screen on AWS Mgmt Console, I get the error message: "Public Key Certificate and Private ...
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What's the difference between emulation and simulation? [duplicate]

In simple understandable terms, what is the difference between the two terms? 10 Answers ...
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Extracting bits with a single multiplication

I saw an interesting technique used in an answer to another question , and would like to understand it a little better. ...
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What are the advantages of using a schema-free database like MongoDB compared to a relational databa

I'm used to using relational databases like MySQL or PostgreSQL, and combined with MVC frameworks such as Symfony, RoR or Django, and I think it works great. ...
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Difference between @Mock and @InjectMocks

What is the difference between @Mock and @InjectMocks in Mockito framework? 12 Answers ...
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How to hide element using Twitter Bootstrap and show it using jQuery?

...ated, .hide is available, but it does not always affect screen readers and is deprecated as of v3.0.1 Second, use jQuery's .toggleClass(), .addClass() and .removeClass() <div id="myId" class="hidden">Foobar</div> To show it: $("#myId").removeClass('hidden'); To hide it: $("#myI...