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how to convert from int to char*?
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In C++17, use std::to_chars as:
std::array<char, 10> str;
std::to_chars(str.data(), str.data() + str.size(), 42);
In C++11, use std::to_string as:
std::string s = std::to_string(number);
char const *pchar = s.c_str()...
Integer division: How do you produce a double?
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double num = 5;
That avoids a cast. But you'll find that the cast conversions are well-defined. You don't have to guess, just check the JLS. int to double is a widening conversion. From §5.1.2:
Widening primitive conversions do not
lose information about the over...
Combine two ActiveRecord::Relation objects
Suppose I have the following two objects:
8 Answers
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What's the difference between ngModel.$modelValue and ngModel.$viewValue
I have the following ckEditor directive. At the bottom are two variations that I have seen from examples on how to set the data in the editor:
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What is the difference between Θ(n) and O(n)?
Sometimes I see Θ(n) with the strange Θ symbol with something in the middle of it, and sometimes just O(n). Is it just laziness of typing because nobody knows how to type this symbol, or does it mean something different?
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Why would one declare a Java interface method as abstract?
I used the "pull interface" refactoring feature of Eclipse today to create an interface based on an existing class. The dialog box offered to create all the new methods of the new interface as "abstract" methods.
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how to create a file name with the current date & time in python?
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While not using datetime, this solves your problem (answers your question) of getting a string with the current time and date format you specify:
import time
timestr = time.strftime("%Y%m%d-%H%M%S")
print timestr
yields:
20120515-155...
How to check whether a string is Base64 encoded or not
I want to decode a Base64 encoded string, then store it in my database. If the input is not Base64 encoded, I need to throw an error.
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How to squash commits in git after they have been pushed?
This gives a good explanation of squashing multiple commits:
8 Answers
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Switch branch names in git
...way to ask this question, so here's a desciption of the problem. I was working on master and committed some stuff and then decided I wanted to put that work on hold. I backed up a few commits and then branched from before I started my crap work. Practically this works fine, I just now have a differe...