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Round a decimal to the first decimal position that is not zero Languages

Round a decimal to the first decimal position that is not zero

I want to shorten a number to the first decimal position that is not null. The Decimal places behind should be rounded.
09月21日 发表评论
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Why there is 16 byte difference instead of 8 between two pointers? Languages

Why there is 16 byte difference instead of 8 between two pointers?

I commented addresses when I printed their values in the code above. Difference between the addresses stored inside 0th and 1st indexed pointers is 16 bytes. I thought at first it is because the string I assign them is 9 characters so more than 8 bytes, it will not fit...
09月21日 发表评论
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What is the syntax: `instance.method::<SomeThing>()`? Languages

What is the syntax: `instance.method::<SomeThing>()`?

I read the below syntax from byteorder:I can't find any documentation which explains the syntax instance.method::<SomeThing>()
09月21日 发表评论
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Spliterator vs Stream.Builder Languages

Spliterator vs Stream.Builder

I read some questions how to create a finite Stream ( Finite generated Stream in Java - how to create one?, How do streams stop?).
09月21日 发表评论
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Why does std::vector uses std::allocator instead of operator new and delete [duplicate] Languages

Why does std::vector uses std::allocator instead of operator new and delete [duplicate]

This question already has an answer here:I'm reading the book "Programming Principle and Practices using C++" by the author of the language.
09月21日 发表评论
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Keywords (or reserved words) in Julia 1.0 Languages

Keywords (or reserved words) in Julia 1.0

How do I get keyword information for the version of Julia being run?For example, there are 33 keywords in Python 3.6, but only 31 in 2.7:
09月21日 发表评论
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Will the macro `assert` be removed in C++20? Languages

Will the macro `assert` be removed in C++20?

According to cppreference, assert will be used as a C++ attribute.However, there already exist tons of projects heavily dependent on the macro assert, is there any bad effect?
09月20日 发表评论
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Understanding of final variable Languages

Understanding of final variable

Suppose a class contains a final variable. Why is new space allocated for final variable every time an object of the class is created even though its value can't be changed? Why its memory allocation is not like a static variable?
09月20日 发表评论
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Replace .equals() with Objects.equals() Languages

Replace .equals() with Objects.equals()

I was writing code, when IntelliJ suggested me a correction on:telling me that the Method invocation equals may produce the good old java.lang.NullPointerException , proposing as solution something that I wasn't aware of, Objects.equals:
09月20日 发表评论
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Is it possible to decode x86-64 instructions in reverse? Languages

Is it possible to decode x86-64 instructions in reverse?

I was wondering if it is possible to decode x86-64 instructions in reverse?I need this for a runtime dissembler. Users can point to a random location in memory and then should be able to scroll upwards and see what instructions came before the specified address.
09月20日 发表评论
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