difference

问题 I am new to Django and Django-Rest. I am confused about when I should use these? what are their advantages and disadvantages? I have only seen this- http://www.cdrf.co The only thing I know is there are a lot of ways to do 1 thing. But this is totally unclear to me. 回答1: In Django, these four terms we use frequently for different purposes in the projects. I have tried to collect and share the actual meaning with the links to details description of each term. Please check if you find these

问题 So I'm playing around with Compare-Object, and it works fine for comparing files. But what about just strings? Is there a way to find the difference between strings? CompareTo() is good about reporting that there is a difference, but not what the difference is. For example: PS:> $a = "PowerShell rocks" PS:> $b = "Powershell rocks" PS:> $a.CompareTo($b) 1 PS:> Compare-Object -ReferenceObject $a -DifferenceObject $b PS:> Nothing returned. Any way to let me know about the actual difference

问题 I've been using Git Extensions for a while now (it's awesome!) but I haven't found a simple answer to the following: Sometimes, when typing a commit message, a make a typo. My friend showed me how to fix it the following way (in Git Extentions): Right-Click on the commit > Advanced > Fixup commit Then I simply check the box "Amend" and rewrite my message and voila! My commit message is fixed. However this other option "Squash commit"... I have always wondered what it does?! My question is:

问题 I have 2 matrices, I want to compare them (row.name wise) to find the difference. > head(N1) Total_Degree Transitivity Betweenness Closeness_All 2410016O06RIK 1 NaN 0.00000 0.0003124024 AGO1 4 0.1666667 37.00000 0.0003133814 APEX1 4 0.6666667 4.00000 0.0003144654 ATR 4 0.1666667 19.50000 0.0003128911 CASP3 24 0.0000000 806.00000 0.0002980626 CCND2 4 0.3333333 97.33333 0.0003132832 head(N2) Total_Degree Transitivity Betweenness Closeness_All 2410016O06RIK 1 NaN 0.0 2.279982e-04 ADI1 1 NaN 0.0

问题 s.difference(t) returns a new set with no elements in t . s.difference_update(t) returns an updated set with no elements in t . What's the difference between these two set methods? Because the difference_update updates set s, what precautions should be taken to avoid receiving a result of None from this method? In terms of speed, shouldn't set.difference_update be faster since you're only removing elements from set s instead of creating a new set like in set.difference()? 回答1: Q. What's the

问题 Just want to know if i can set the variable a sign off time to midnight. i want sign off to be a raw_input and midnight to be fixed value so far i have this: #!/usr/bin/python from datetime import datetime from Tkinter import * import math #Variablesr FMT = '%H%M' #Time Format rate1 = 35.34 #Base Hourly Rate rate2 = 35.34 #Base Hourly Rate rate3 = 35.34 #Base Hourly Rate rate4 = 35.34 #Base Hourly Rate rate5 = 35.34 #Base Hourly Rate rate6 = 50 #Base Hourly Rate rate7 = 70 #Base Hourly Rate

问题 Can you explain what is the difference between HashSet<T> and List<T> in .NET? Maybe you can explain with an example in what cases HashSet<T> should be preferred against List<T> ? 回答1: Unlike a List<> ... A HashSet is a List with no duplicate members. Because a HashSet is constrained to contain only unique entries, the internal structure is optimised for searching (compared with a list) - it is considerably faster Adding to a HashSet returns a boolean - false if addition fails due to already

问题 I am currently working on an intrusion system based on video surveillance. In order to complete this task, I take a snapshot of the background of my scene (assume it's totally clean, no people or moving objects). Then, I compare the frame I get from the (static) video camera and look for the differences. I have to be able to check any differences, not only human shape or whatever, so I cannot specific feature extraction. Typically, I have: I am using OpenCV, so to compare I basically do: cv:

问题 This question already has answers here : What exactly are C++ definitions, declarations and assignments? (8 answers) Closed 5 years ago . I am new to programming and trying to learn C. I am reading a book where I read about these statements but could not understand their meaning. 回答1: Declaration: int a; Assignment: a = 3; Declaration and assignment in one statement: int a = 3; Declaration says, "I'm going to use a variable named " a " to store an integer value." Assignment says, "Put the

问题 What is a concise and readable way of interpolating a 1D array such that the maximum difference between elements is minimized? For instance, if I had the array [4 9 13 25] and I was allowed to add 1 more number in order to minimize the maximum difference between elements I would insert a 19 between 13 and 25 (max difference is now 6 rather than 12). Of course a good ole' for loop will get it done, but for posterity is there a less verbose approach than below? # current array nums = np.array(