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difference between foldLeft and reduceLeft in Scala
...e between reducing and folding
The difference is not the implementation at all, just look at the signatures.
The question doesn't have anything to do with Scala in particular, it's rather about the two concepts of functional programming.
Back to your question:
Here is the signature of foldLeft (c...
How to iterate a loop with index and element in Swift
... |
edited Apr 18 '16 at 5:32
rounak
8,30922 gold badges3838 silver badges5757 bronze badges
answered Feb...
Rename a dictionary key
... this question seems to be asking, is impractical because dict keys are usually immutable objects such as numbers, strings or tuples. Instead of trying to modify the key, reassigning the value to a new key and removing the old key is how you can achieve the "rename" in python.
...
C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ntoa(serverAddr.sin_addr), ntohs(serverAddr.sin_port));
m_allmsg.SetSel(32767,32767);
m_allmsg.ReplaceSel(msg);
if(connect(sock, (struct sockaddr*)&serverAddr, sizeof(serverAddr))==SOCKET_ERROR){
int err = WSAGetLastError();
if(err==WSAEWOULDBLOCK){
msg.Format("Waiting....../n"...
retrieve links from web page using python and BeautifulSoup [closed]
...ref'):
print(link['href'])
The BeautifulSoup documentation is actually quite good, and covers a number of typical scenarios:
https://www.crummy.com/software/BeautifulSoup/bs4/doc/
Edit: Note that I used the SoupStrainer class because it's a bit more efficient (memory and speed wise), if you...
How do I use arrays in C++?
C++ inherited arrays from C where they are used virtually everywhere. C++ provides abstractions that are easier to use and less error-prone ( std::vector<T> since C++98 and std::array<T, n> since C++11 ), so the need for arrays does not arise quite as often as it does in C. However, ...
How to send a PUT/DELETE request in jQuery?
...ch as PUT and DELETE, can also be used here, but they are not supported by all browsers." from: api.jquery.com/jQuery.ajax/#options
– andilabs
Dec 2 '13 at 8:11
23
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How to use “raise” keyword in Python [duplicate]
...
329
It has 2 purposes.
yentup has given the first one.
It's used for raising your own errors....
What is lexical scope?
...
I understand them through examples. :)
First, lexical scope (also called static scope), in C-like syntax:
void fun()
{
int x = 5;
void fun2()
{
printf("%d", x);
}
}
Every inner level can access its outer levels.
There is another way, called dynamic scope used by ...