Questions tagged [difference]
This tag may refer to 1) the difference between two numbers (i.e. the difference between 5 and 10 is 5) or 2) the things that two or more particular objects do not share in common.
difference
1,996
questions
850
votes
10
answers
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views
What's the difference between a module and package in Python?
What's the difference between a module and package in Python?
See also: What's the difference between "package" and "module"? (for other languages)
- 9,283
829
votes
13
answers
674k
views
Differences between Oracle JDK and OpenJDK
NOTE: This question is from 2014. As of Java 11 OpenJDK and Oracle
JDK are converging.
Are there any crucial differences between Oracle and OpenJDK?
For example, are the garbage collection and ...
- 19.5k
401
votes
12
answers
504k
views
Java 8: Difference between two LocalDateTime in multiple units
I am trying to calculate the difference between two LocalDateTime.
The output needs to be of the format y years m months d days h hours m minutes s seconds. Here is what I have written:
import java....
- 29.5k
376
votes
22
answers
423k
views
What is the difference between JVM, JDK, JRE & OpenJDK?
What is the difference between JVM, JDK, JRE, and OpenJDK?
- 4,393
368
votes
17
answers
240k
views
What's the difference between ViewData and ViewBag?
I saw the ViewBag in MVC 3. How's that different than ViewData in MVC 2?
- 50.5k
362
votes
12
answers
144k
views
What is the difference between memoization and dynamic programming?
What is the difference between memoization and dynamic programming? I think dynamic programming is a subset of memoization. Is it right?
- 22.5k
285
votes
22
answers
519k
views
Get time difference between datetimes
How to get the difference between 2 times? Example:
var now = "04/09/2013 15:00:00";
var then = "04/09/2013 14:20:30";
//expected result:
"00:39:30"
I tried:
var now = ...
- 7,429
275
votes
9
answers
223k
views
What is the difference between bottom-up and top-down?
The bottom-up approach (to dynamic programming) consists in first looking at the "smaller" subproblems, and then solve the larger subproblems using the solution to the smaller problems.
The top-down ...
- 3,167
224
votes
3
answers
106k
views
“Diff” an image using ImageMagick
How can I get the difference between two images? I have the original image. Someone has written on an exact duplicate of the original image. Now, I need to compare the original to the written on image ...
- 6,095
201
votes
8
answers
104k
views
What is the difference between HashSet<T> and List<T>?
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&...
- 52.7k
200
votes
8
answers
101k
views
What's the difference between "squash" and "fixup" in Git/Git Extension?
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 ...
- 5,068
199
votes
8
answers
189k
views
Difference between IsNullOrEmpty and IsNullOrWhiteSpace in C# [duplicate]
What are differences between these commands in C#
string text= " ";
1-string.IsNullOrEmpty(text.Trim())
2-string.IsNullOrWhiteSpace(text)
- 3,320
181
votes
3
answers
157k
views
window.location.href vs window.location.replace vs window.location.assign in JavaScript
What is the difference between
window.location.href="http://example.com";
window.location.replace("http://example.com");
window.location.assign("http://example.com");
I read in many forums that ...
- 1,979
160
votes
5
answers
88k
views
What is the difference between size and count in pandas?
That is the difference between groupby("x").count and groupby("x").size in pandas ?
Does size just exclude nil ?
- 2,485
157
votes
15
answers
198k
views
Flutter: Find the number of days between two dates
I currently have a user's profile page that brings out their date of birth and other details. But I am planning to find the days before their birthday by calculating the difference between today's ...
- 3,001
152
votes
9
answers
95k
views
Android - Snackbar vs Toast - usage and difference
We have been using just Toasts in our application so far and as we are planning to adopt some new features from Support Design Library I am wondering what's the recommended usage for Snackbar vs. ...
- 6,664
150
votes
5
answers
79k
views
Difference between HBase and Hadoop/HDFS
This is kind of naive question but I am new to NoSQL paradigm and don't know much about it. So if somebody can help me clearly understand difference between the HBase and Hadoop or if give some ...
- 1,515
98
votes
5
answers
111k
views
What are the differences between activity and fragment?
As per my research, there is a significant difference in the concept of backstack and how they exist:
Activity
When an activity is placed to the backstack of activities the user
can navigate back to ...
- 42.7k
95
votes
3
answers
41k
views
Java: what exactly is the difference between NIO and NIO.2?
I don't quite understand how different they are from each other so I have some inquiries regarding these two packages.
After looking around a bit on Google, it seems like Oracle decided to update the ...
- 953
75
votes
14
answers
160k
views
Android difference between Two Dates
I have two date like:
String date_1="yyyyMMddHHmmss";
String date_2="yyyyMMddHHmmss";
I want to print the difference like:
2d 3h 45m
How can I do that? Thanks!
- 1,223
75
votes
1
answer
24k
views
Package vs Library
I've just started working with CMake and I noticed that they have both a find_package and a find_library. And this confuses me. Can somebody explain the difference between a package and a library in ...
- 1,293
74
votes
2
answers
88k
views
What are the differences between MPI and OpenMP? [closed]
I would like to know (in a few words) what are the main differences between OpenMP and MPI.
- 1,159
70
votes
2
answers
105k
views
What's the difference between Mockito Matchers isA, any, eq, and same?
I am confused on what's the difference between them, and which one to choose in which case. Some difference might be obvious, like any and eq, but I'm including them all just to be sure.
I wonder ...
- 1,127
67
votes
8
answers
44k
views
What's the difference between convolutional and recurrent neural networks? [closed]
I'm new to the topic of neural networks. I came across the two terms convolutional neural network and recurrent neural network.
I'm wondering if these two terms are referring to the same thing, or, ...
- 761
60
votes
6
answers
120k
views
Typescript difference between two arrays
Is there a way to return the missing values of list_a from list_b in TypeScrpit?
For example:
var a1 = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];
var a2 = ['a', 'b', 'c', 'd', 'z'];
The result value is
['e'...
- 2,506
60
votes
7
answers
136k
views
row-level trigger vs statement-level trigger
I am having a hard time understanding the difference between 'row-level triggers' and 'statement-level triggers'.
From my understanding, in the scenario a statement level trigger is created, the whole ...
- 1,203
59
votes
4
answers
69k
views
Queue<T> vs List<T>
I'm currently using a List<T> as a queue (use lst[0] then lst.removeAt(0)) to hold objects. There's about 20 items max at a given time. I realized there was an actual Queue<T> class. I'...
- 5,738
57
votes
6
answers
66k
views
What is the difference between cross-validation and grid search?
In simple words, what is the difference between cross-validation and grid search? How does grid search work? Should I do first a cross-validation and then a grid search?
- 2,395
50
votes
4
answers
123k
views
CV - Extract differences between two images
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 ...
- 1,072
45
votes
1
answer
70k
views
The difference between head & tail recursion [duplicate]
I'm trying to get the difference between these 2 recursive strategies.
The definition I was told is the following:
Tail Recursion: A call is tail-recursive if nothing has to be done after the call ...
- 950
43
votes
3
answers
23k
views
what is the usage of HTML5 figure with img
Is there any specific advantage/usage of using HTML5 <figure> over <img>?
I think <figure> is useless without <figurecaption>, isn't it?
It will be helpful if explain with an ...
- 53.4k
42
votes
1
answer
46k
views
How to compare/show the difference between 2 videos in ffmpeg?
I am a newbie at encoding. I have read and tried x264 in lossless mode (-qp 0), however I'd like to make sure that in my new video, every single pixel contains the same information as the source file (...
- 576
41
votes
2
answers
22k
views
(git) diff output relative path?
I need to get some diffs in my repo that are not relative to the base of the repo, but instead relative to a given base or given path.
By default I get:
git diff
diff --git a/path/to/file b/path/to/...
- 3,038
40
votes
2
answers
55k
views
Difference between ANSI and Unicode drivers of MySQL
On choosing Data Source under ODBC (64-Bit) on Windows, i get two available options of MySQL Database:
MySQL ODBC 5.3 ANSI Driver
MySQL ODBC 5.3 Unicode Driver
What are the difference between these ...
- 6,811
37
votes
2
answers
24k
views
What is the Difference Between x:Key, x:Name, and x:UID in a DataTemplate in WPF?
I am trying to create dynamic tabs in WPF, and I'm trying to write a content template that will only apply to some tab items. I want to be able to create an identifier for the content template so that ...
- 6,396
36
votes
6
answers
283k
views
Calculate time difference in minutes in SQL Server
I need the time difference between two times in minutes. I am having the start time and end time as shown below:
start time | End Time
11:15:00 | 13:15:00
10:45:00 | 18:59:00
I need the ...
- 2,179
36
votes
5
answers
46k
views
Differences between ComboBox and ChoiceBox in JavaFX
What are the differences between ComboBox and ChoiceBox in JavaFX? I'm not entirely clear on that just from the Javadoc for both classes.
At the end of the day, I need a dropdown control that can be ...
- 1,241
35
votes
6
answers
13k
views
How do I get PyCharm to show entire error diffs from pytest?
I am using Pycharm to run my pytest unit tests. I am testing a REST API, so I often have to validate blocks of JSON. When a test fails, I'll see something like this:
FAILED
test_document_api.py:0 (...
- 16.8k
34
votes
4
answers
63k
views
Difference between np.dot and np.multiply with np.sum in binary cross-entropy loss calculation
I have tried the following code but didn't find the difference between np.dot and np.multiply with np.sum
Here is np.dot code
logprobs = np.dot(Y, (np.log(A2)).T) + np.dot((1.0-Y),(np.log(1 - A2))....
- 2,145
34
votes
2
answers
32k
views
css difference between background: and background-image:
quick simple question
In the following example of an external CSS page;
body {
background-image: url(background.jpg);
}
header {
background: url(background.jpg);
}
I understand they are ...
- 363
31
votes
1
answer
26k
views
How to calculate time difference by group using pandas?
Problem
I want to calculate diff by group. And I don’t know how to sort the time column so that each group results are sorted and positive.
The original data :
In [37]: df
Out[37]:
id ...
- 1,734
31
votes
1
answer
128k
views
Regex difference: (\w+)? and (\w*)
Is there any difference between (\w+)? and (\w*) in regex?
It seems the same, doesn't it?
- 4,328
28
votes
8
answers
7k
views
In C# what is the difference between the upper and lower case String/string? [duplicate]
Newbie here, in C# what is the difference between the upper and lower case String/string?
KazarT
28
votes
1
answer
79k
views
Difference between Ctrl K + D and Ctrl E + D
What is the difference between the Visual Studio 2010 shortcuts Ctrl E + D and Ctrl K + D?
user887983
27
votes
9
answers
67k
views
Find difference between two strings in JavaScript
I need to find difference between two strings.
const string1 = 'lebronjames';
const string2 = 'lebronnjames';
The expected output is to find the extra n and log it to the console.
Is there any way to ...
- 442
25
votes
7
answers
45k
views
Difference between "import X" and "from X import *"? [duplicate]
In Python, I'm not really clear on the difference between the following two lines of code:
import X
or
from X import *
Don't they both just import everything from the module X? What's the ...
- 36.4k
25
votes
5
answers
51k
views
Python find numbers not in set
I have a range of numbers such as 1-100. And I have a set that holds all, or a random subset of numbers in that range such as:
s = set([1,2,3,35,67,87,95])
What is a good way to get all of the ...
- 49.9k
25
votes
2
answers
21k
views
What is the difference between a Confusion Matrix and Contingency Table?
I'm writting a piece of code to evaluate my Clustering Algorithm and I find that every kind of evaluation method needs the basic data from a m*n matrix like A = {aij} where aij is the number of data ...
- 447
24
votes
1
answer
13k
views
How to handle iterator::difference_type when you have no way of measuring the difference?
I'm writing a C++ wrapper for a 3rd party C library.
The library provides some functions for iterating through a series of objects.
I want to write an iterator to wrap this behaviour so iteration is ...
- 4,017
23
votes
4
answers
33k
views
Why do WPF Applications look different between Windows 7 and Windows 8 and can this be fixed?
I'm really surprised that this question does not appear to have been asked yet... if it has, but I just couldn't find it, apologies.
Ok, so my work computer has just been upgraded from Windows 7 to ...
- 69.6k