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What does the “===” operator do in Ruby? [duplicate]
I've seen it used a few times lately but can't figure out what it does. Can anyone illustrate how it works?
3 Answers
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Break a previous commit into multiple commits
Without creating a branch and doing a bunch of funky work on a new branch, is it possible to break a single commit into a few different commits after it's been committed to the local repository?
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What's the difference between the atomic and nonatomic attributes?
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The last two are identical; "atomic" is the default behavior (note that it is not actually a keyword; it is specified only by the absence of nonatomic -- atomic was added as a keyword in recent versions of llvm/clang).
Assuming that you are @synthesizing the method implementa...
Why isn't my Pandas 'apply' function referencing multiple columns working? [closed]
I have some problems with the Pandas apply function, when using multiple columns with the following dataframe
6 Answers
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What differences, if any, between C++03 and C++11 can be detected at run-time?
It is possible to write a function, which, when compiled with a C compiler will return 0, and when compiled with a C++ compiler, will return 1 (the trivial sulution with
#ifdef __cplusplus is not interesting).
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Getting the difference between two repositories
How can we get the difference between two git repositories?
11 Answers
11
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Ruby: kind_of? vs. instance_of? vs. is_a?
...e_of? is different from the other two in that it only returns true if the object is an instance of that exact class, not a subclass.
Example:
"hello".is_a? Object and "hello".kind_of? Object return true because "hello" is a String and String is a subclass of Object.
However "hello".instance_of? O...
MySQL - ORDER BY values within IN()
I'm hoping to sort the items returned in the following query by the order they're entered into the IN() function .
6 Answe...
Makefile经典教程（入门必备） - C/C++ - 清泛网 - 专注IT技能提升
...每个源文件都应该对应于一个中间目标文件（O文件或是OBJ文件）。
1 Makefile 介绍
cc -o edit main.o kbd.o command.o display.o \
cc -c main.c
cc -c kbd.c
cc -c command.c
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Makefile经典教程（入门必备） - C/C++ - 清泛网 - 专注IT技能提升
...每个源文件都应该对应于一个中间目标文件（O文件或是OBJ文件）。
1 Makefile 介绍
cc -o edit main.o kbd.o command.o display.o \
cc -c main.c
cc -c kbd.c
cc -c command.c
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