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What is the difference between class and instance attributes?

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What's with 181783497276652981 and 8682522807148012 in Random (Java 7)?

...f their creation times fall in the same millisecond range, they will give completely identical sequences. (same seed => same sequence) The second one is not thread safe. Multiple threads can get identical RNGs when initializing at the same time. Additionally, seeds of subsequent initializations...
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How do I retrieve the number of columns in a Pandas data frame?

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Using smart pointers for class members

...eral. What I don't understand is the real usage. It seems like everybody recommends using unique_ptr as the way to go almost all the time. But how would I implement something like this: ...
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What is the significance of 1/1/1753 in SQL Server?

...ney explained the choice this way So, with 12 days lost, how can you compute dates? For example, how can you compute the number of days between October 12, 1492, and July 4, 1776? Do you include those missing 12 days? To avoid having to solve this problem, the original Sybase SQL Ser...
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delete map[key] in go?

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How do I set the path to a DLL file in Visual Studio?

...depends on a DLL file. When I debug my application, the applicationwould complain that: 6 Answers ...
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How to check if a specified key exists in a given S3 bucket using Java

... All - see an updated answer to this question below: stackoverflow.com/a/36653034/49678 – alexandroid Sep 5 '16 at 23:00 3 ...
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Dynamically generating a QR code with PHP [closed]

...n for the link update. To use this , basically: https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=http%3A%2F%2Fwww.google.com%2F&choe=UTF-8 300x300 is the size of the QR image you want to generate, the chl is the url-encoded string you want to change into a QR code, and the ...
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vertical alignment of text element in SVG

...font size changes. It defaults to the baseline with the same name as the computed value of the alignment-baseline property. That is, the position of "ideographic" alignment-point in the block-progression-direction is the position of the "ideographic" baseline in the baseline-table of the obj...