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How do I copy an object in Java?

... what happens; I am saying that you have an incorrect understanding of the meaning of "copies all the fields". The field is the reference, it is not the object being referred to. "copying all fields" means "copying all those references". It is good that you pointed out what exactly this means, for a...
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What are the differences in die() and exit() in PHP?

...is it", that is absolutely right. Still it is also a fact that they simply mean different things in several languages (which is ok). Looking at it from a neutral perspective, it definately holds true: There is confusion because of the different meanings (even if it is php's fault for creating two eq...
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What's wrong with nullable columns in composite primary keys?

...sful comparison. Even a comparison to itself (NULL = NULL) will fail. This means a key containing NULL would not work. Additonally, NULL is allowed in a foreign key, to mark an optional relationship.(*) Allowing it in the PK as well would break this. (*)A word of caution: Having nullable foreign...
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How to capitalize the first letter in a String in Ruby

... characters, because there it's at least somewhat well-defined. What do I mean by "contextual information"? For example, to capitalize i properly, you need to know which language the text is in. English, for example, has only two is: capital I without a dot and small i with a dot. But Turkish has ...
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Changing the “tick frequency” on x or y axis in matplotlib?

... What does base=1.0 actually mean/do ? – javadba Apr 23 at 6:18 1 ...
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How does the bitwise complement operator (~ tilde) work?

... And since the first bit, i.e., the sign bit is 1 in the binary number, it means that the sign is negative for the number it stored. (here, the number referred to is not 2 but the one’s complement of 2). Now, since the numbers are stored as 2’s complement (taking the one’s complement of a num...
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What is Unicode, UTF-8, UTF-16?

...problems. Also, even if the character type is based on a UTF, that doesn't mean the strings are proper UTF. They may allow byte sequences that are illegal. Generally, you'll have to use a library that supports UTF, such as ICU for C, C++ and Java. In any case, if you want to input/output something o...
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Why is the tag deprecated in HTML?

... @Dmitry <strong> and <h>'s have semantic meaning that goes beyond visual styling. I guess if <center> was still around you could style it with CSS, eg to make its content left justified. – Nick Rice Dec 8 '16 at 16:41 ...
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How to pass prepareForSegue: an object

... method and pass any objects you need to there. Here's an example... - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Make sure your segue name in storyboard is the same as this line if ([[segue identifier] isEqualToString:@"YOUR_SEGUE_NAME_HERE"]) { // ...
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Get list of all routes defined in the Flask app

... BuildError: ('DeleteEvent', {}, None). Instead, to get the url I just did url = rule.rule. Any idea why your method doesn't work for me? – J-bob Nov 11 '12 at 19:57 ...