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When do I use a dot, arrow, or double colon to refer to members of a class in C++?
Coming from other C-derived languages (like Java or C#) to C++, it is at first very confusing that C++ has three ways to refer to members of a class: a::b , a.b , and a->b . When do I use which one of these operators?
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stringstream, string, and char* conversion confusion
My question can be boiled down to, where does the string returned from stringstream.str().c_str() live in memory, and why can't it be assigned to a const char* ?
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Setting PATH environment variable in OSX permanently
I have read several answers on how to set environmental variables on OSX as permanently.
6 Answers
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Generating an MD5 checksum of a file
Is there any simple way of generating (and checking) MD5 checksums of a list of files in Python? (I have a small program I'm working on, and I'd like to confirm the checksums of the files).
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what exactly is device pixel ratio?
this is mentioned every article about mobile web, but nowhere I can found an explanation of what exactly does this attribute measure.
Can anyone please elaborate what does queries like this check?
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BCL (Base Class Library) vs FCL (Framework Class Library)
What's the difference between the two? Can we use them interchangeably?
6 Answers
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Pass a data.frame column name to a function
I'm trying to write a function to accept a data.frame ( x ) and a column from it. The function performs some calculations on x and later returns another data.frame. I'm stuck on the best-practices method to pass the column name to the function.
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What is the meaning of the term arena in relation to memory?
I'm reading a book on memory as a programming concept. In one of the later chapters, the author makes heavy use of the word arena , but never defines it. I've searched for the meaning of the word and how it relates to memory, and found nothing. Here are a few contexts in which the author uses the...
Set font-weight using Bootstrap classes
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EDIT 2 (final) : According to the bootstrap 4 documentation, class="font-weight-bold" is what you are looking for.
EDIT : You can use class="font-weight-bold" as shown here (Bootstrap 4 alpha).
I kept the original answer below for clarity purposes.
I am posting this a...
How to “warm-up” Entity Framework? When does it get “cold”?
No, the answer to my second question is not the winter.
5 Answers
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