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How to create a trie in Python
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Static memory-efficient Trie structures for Python (2.x and 3.x).
String data in a MARISA-trie may take up to 50x-100x less memory than
in a standard Python dict; the raw lookup speed is comparable; trie
also provides fast advanced methods like prefix search.
Based on marisa-trie C...
How do I filter ForeignKey choices in a Django ModelForm?
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form = ClientForm(the_company,request.POST) #<-- Note the extra arg
if form.is_valid():
form.save()
return HttpResponseRedirect(the_company.get_clients_url())
else:
form = ClientForm(the_company)
return render_...
fstream默认不支持中文路径和输出整数带逗号的解决办法 - C/C++ - 清泛网 -...
...如下面代码：
#include <iostream>
#include <fstream>
#include <string>
#include <direct.h>
using namespace std;
void main()
{
_mkdir("测试"); //新建一个中文文件夹
ofstream outfile( "测试/test.txt", ios::out ); //创建文件
if( !outfile )
{
cout <<...
how to convert a string to date in mysql?
I have a string column which acts as a date and I want to select it as a date .
5 Answers
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Test if characters are in a string
I'm trying to determine if a string is a subset of another string. For example:
9 Answers
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How to concatenate two strings in C++?
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First of all, don't use char* or char[N]. Use std::string, then everything else becomes so easy!
Examples,
std::string s = "Hello";
std::string greet = s + " World"; //concatenation easy!
Easy, isn't it?
Now if you need char const * for some reason, such as when you wan...
How to assign string to bytes array
I want to assign string to bytes array:
9 Answers
9
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Trim spaces from start and end of string
...am trying to find a way to trim spaces from the start and end of the title string. I was using this, but it doesn't seem to be working:
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Replacing instances of a character in a string
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Strings in python are immutable, so you cannot treat them as a list and assign to indices.
Use .replace() instead:
line = line.replace(';', ':')
If you need to replace only certain semicolons, you'll need to be more speci...
Difference between int32, int, int32_t, int8 and int8_t
...ktop/server machines, it probably won't be.
Oops -- missed the part about char. You'd use int8_t instead of char if (and only if) you want an integer type guaranteed to be exactly 8 bits in size. If you want to store characters, you probably want to use char instead. Its size can vary (in terms of ...