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What is the difference between map and flatMap and a good use case for each?
Can someone explain to me the difference between map and flatMap and what is a good use case for each?
16 Answers
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MFC CString::Format()函数详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...而且每个参数可以不同。
如以下例子：
Format("my name is %6s","wind");
返回后就是
my name is wind
现在来看Format参数的详细情况：
Format里面可以写普通的字符串，比如"my name is"
但有些格式指令字符具有特殊意义，比如"%6...
How can I profile C++ code running on Linux?
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If your goal is to use a profiler, use one of the suggested ones.
However, if you're in a hurry and you can manually interrupt your program under the debugger while it's being subjectively slow, there's a simple way to find performance p...
Uppercase or lowercase doctype?
When writing the HTML5 doctype what is the correct method?
7 Answers
7
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How to determine if binary tree is balanced?
It's been a while from those school years. Got a job as IT specialist at a hospital. Trying to move to do some actual programming now. I'm working on binary trees now, and I was wondering what would be the best way to determine if the tree is height-balanced.
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Detecting an undefined object property
What's the best way of checking if an object property in JavaScript is undefined?
46 Answers
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Returning null as an int permitted with ternary operator but not if statement
...cribed in the Java Language Specification, 15.25), and moves happily on. This will generate a NullPointerException at run time, which you can confirm by trying it.
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What should main() return in C and C++?
What is the correct (most efficient) way to define the main() function in C and C++ — int main() or void main() — and why? And how about the arguments?
If int main() then return 1 or return 0 ?
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What is the difference between dynamic and static polymorphism in Java?
...ample that explains the difference between Dynamic and Static polymorphism in Java?
14 Answers
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What's the rationale for null terminated strings?
...cked byte
contains the number of characters in
the string; in B, there is no count
and strings are terminated by a
special character, which B spelled
*e. This change was made partially
to avoid the limitation on the length
of a string caused by holding the
count in an 8- or 9-bit slo...