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App Inventor 2 实现上传文件到服务器全方案总结
App Inventor 2 实现上传文件到服务器全方案总结
1、图片Base64化
2、通用（二级制）文件上...
What is the difference between int, Int16, Int32 and Int64?
What is the difference between int , System.Int16 , System.Int32 and System.Int64 other than their sizes?
10 Answers
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nonlocal keyword in Python 2.x
I'm trying to implement a closure in Python 2.6 and I need to access a nonlocal variable but it seems like this keyword is not available in python 2.x. How should one access nonlocal variables in closures in these versions of python?
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Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
...rray. For this example let us say the array is 4x4 and I want to extract a 2x2 array from it.
7 Answers
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Write a function that returns the longest palindrome in a given string
I thought of a solution but it runs in O(n^2) time
22 Answers
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How to convert int[] into List in Java?
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20 Answers
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“for loop” with two variables? [duplicate]
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201
If you want the effect of a nested for loop, use:
import itertools
for i, j in itertools.prod...
Getting key with maximum value in dictionary?
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25 Answers
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LINQ with groupby and count
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412
After calling GroupBy, you get a series of groups IEnumerable<Grouping>, where each Groupi...