Difference | Simple way to identify what is different between 2 instances
kandi X-RAY | Difference Summary
kandi X-RAY | Difference Summary
Better way to identify what's different between 2 instances.
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Difference Key Features
Difference Examples and Code Snippets
const getSecondsDiffBetweenDates = (dateInitial, dateFinal) =>
(dateFinal - dateInitial) / 1000;
getSecondsDiffBetweenDates(
new Date('2020-12-24 00:00:15'),
new Date('2020-12-24 00:00:17')
); // 2
const difference = (a, b) => {
const s = new Set(b);
return a.filter(x => !s.has(x));
};
difference([1, 2, 3, 3], [1, 2, 4]); // [3, 3]
def set_difference(a, b, aminusb=True, validate_indices=True):
"""Compute set difference of elements in last dimension of `a` and `b`.
All but the last dimension of `a` and `b` must match.
Example:
```python
import tensorflow as tf
def absolute_difference(
labels, predictions, weights=1.0, scope=None,
loss_collection=ops.GraphKeys.LOSSES,
reduction=Reduction.SUM_BY_NONZERO_WEIGHTS):
"""Adds an Absolute Difference loss to the training procedure.
`weights` acts a
def max_difference(a: list[int]) -> tuple[int, int]:
"""
We are given an array A[1..n] of integers, n >= 1. We want to
find a pair of indices (i, j) such that
1 <= i <= j <= n and A[j] - A[i] is as large as possible.
Community Discussions
Trending Discussions on Difference
QUESTION
I am writing my project and wondered. When I read literature or watch videos, I see that this is bad practice. Why? Is this bad for the system?
What is the difference between this
...ANSWER
Answered 2021-Jun-16 at 00:17You have to initialize all instance properties somehow. And you have to do it right up front, either in the declaration line or in your init
method.
But what if you don't actually have the initial value until later, like in viewDidLoad
? Then it is silly to supply a real heavyweight value only to replace it later:
QUESTION
In Typescript, what is the difference between types T1-T4:
...ANSWER
Answered 2021-Jun-15 at 23:46typeof is a way to refer to the type of a value. example:
QUESTION
GNU grep's basic (BRE) and extended (ERE) syntax is documented at https://www.gnu.org/software/grep/manual/html_node/Regular-Expressions.html and PCRE is summarized at man pcresyntax
, but there is no explicit comparison. What are the differences between GNU grep's basic/extended and PCRE (-P
) regular expressions?
ANSWER
Answered 2021-Jun-15 at 20:55My research of the major syntax and functionality differences from http://www.greenend.org.uk/rjk/tech/regexp.html:
.
in GNU grep does not match null bytes and newlines (but does match newlines when used with--null-data
), while Perl, everything except\n
is matched.[...]
in GNU grep defines POSIX bracket expressions, while Perl uses "character" classes. I'm not sure on the details. See http://www.greenend.org.uk/rjk/tech/regexp.html#bracketexpression- "In basic regular expressions the meta-characters
?
,+
,{
,|
,(
, and)
lose their special meaning; instead use the backslashed versions\?
,\+
,\{
,\|
,\(
, and\)
." From https://www.gnu.org/software/grep/manual/html_node/Basic-vs-Extended.html. ERE matches PCRE syntax. - GNU grep
\w
and\W
are the same as[[:alnum:]]
and[^[:alnum]]
, while Perl uses alphanumeric and underscore. - GNU grep has
\<
and\>
for start and end of word.
Perl supports much more additional functionality:
- "nongreedy {}" with syntax
re{...}?
- additional anchors and character types
\A
,\C
,\d
,\D
,\G
,\p
,\P
,\s
,\S
,\X
.\Z
,\z
. (?#comment)
- shy grouping
(?:re)
, shy grouping + modifiers(?modifiers:re)
- lookahead and negative lookahead
(?=re)
and(?!re)
, lookbehind and negative lookbehind(?<=p)
and(?
- Atomic groups
(?>re)
- Conditional expression
(?(cond)re)
- ... and more, see
man pcresyntax
QUESTION
I am making a simulation with C (for perfomance) that (currently) uses recursion and mallocs (generated in every step of the recursion). The problem is that I am not being able to free the mallocs anywhere in the code, without having the wrong final output. The code consist of two functions and the main function:
evolution(double initial_energy)
ANSWER
Answered 2021-Jun-13 at 04:47You're supposed to free memory right after the last time it will be used. In your program, after the while
loop in recursion
, Energy
isn't used again, so you should free it right after that (i.e., right before return event_counter;
).
QUESTION
I have a small webpage that relies on splitting a textarea value by newlines. Is it OK to only use something like textarea.value.split("\n")
or should I also do something with "\r"
to make sure it works on all devices? Would it make any difference at all?
ANSWER
Answered 2021-Jun-15 at 19:07Yes, your attempt should work. But if you want to implement a splitting with either \n
or \r\n
, then try this:
QUESTION
So... I can sympy.integrate
a normal distribution with mean and standard deviation:
ANSWER
Answered 2021-Jun-15 at 01:38Here's a close case that works:
QUESTION
I am trying to check if latitude
and longitude
exist in my SQL database, as currently when they are undefined, it leaves my web app blank on load with the following error TypeError: Cannot read property 'latitude' of undefined
My code was originally
...ANSWER
Answered 2021-Jun-15 at 18:36Looking at error TypeError: Cannot read property 'latitude' of undefined
. My guess is value of device.deviceData
is undefined
.
So,Please do verify with console.log(device)
if deviceData field exists in device.
And, to fix above issue you can try
QUESTION
I have found some similar questions to this. The problem is that none of those solutions work for me and some are too advanced. I'm trying to read the two JSON files and return the difference between them.
I want to be able to return the missing object from file2 and write it into file1.
These are both the JSON files
...ANSWER
Answered 2021-Jun-14 at 19:20with open("file1.json", "r") as f1:
file1 = json.loads(f1.read())
with open("file2.json", "r") as f2:
file2 = json.loads(f2.read())
for item in file2:
if item not in file1:
print(f"Found difference: {item}")
file1.append(item)
print(f"New file1: {file1}")
QUESTION
I tried 5 different implementations of the Sobel operator in Python, one of which I implemented myself, and the results are radically different.
My questions is similar to this one, but there are still differences I don't understand with the other implementations.
Is there any agreed on definition of the Sobel operator, and is it always synonymous to "image gradient"?
Even the definition of the Sobel kernel is different from source to source, according to Wikipedia it is [[1, 0, -1],[2, 0, -2],[1, 0, -1]]
, but according to other sources it is [[-1, 0, 1],[-2, 0, 2],[-1, 0, 1]]
.
Here is my code where I tried the different techniques:
...ANSWER
Answered 2021-Jun-15 at 14:22according to wikipedia it's [[1, 0, -1],[2, 0, -2],[1, 0, 1]] but according to other sources it's [[-1, 0, 1],[-2, 0, 2],[-1, 0, 1]]
Both are used for detecting vertical edges. Difference here is how these kernels mark "left" and "right" edges.
For simplicity sake lets consider 1D example, and let array be
[0, 0, 255, 255, 255]
then if we calculate using padding then
- kernel
[2, 0, -2]
gives[0, -510, -510, 0, 0]
- kernel
[-2, 0, 2]
gives[0, 510, 510, 0, 0]
As you can see abrupt increase in value was marked with negative values by first kernel and positive values by second. Note that is is relevant only if you need to discriminate left vs right edges, when you want just to find vertical edges, you might use any of these 2 aboves and then get absolute value.
QUESTION
I have Windows 10 Pro Version 21H1 Build 19043.1052.
I have followed the guide in https://docs.microsoft.com/en-gb/windows/wsl/install-win10#step-4---download-the-linux-kernel-update-package and in Win 10 WSL won't set default 2 to get wsl. And I want to upgrade to version 2. I installed the regular Ubuntu from the Microsoft app store. And I did wsl --setdefault Ubuntu
followed by wsl --set-default-version 2
and it only gave me For information on key differences with WSL 2 please visit https://aka.ms/wsl2
. But wsl -l -v
was still showing VERSION 1.
So I went an installed Ubuntu-20.04 LTS
and now that version is showing VERSION 2 but not the regular Ubuntu
one.
How can I get them both to version 2?
...ANSWER
Answered 2021-Jun-15 at 15:47When you do --set-default-version
, you're setting the version for future distributions that you install. That doesn't convert or change any current distros you have installed. So for your existing Ubuntu
distro that is version 1, you should use the wsl --set-version
command to convert it to version 2 or revert back to version 1.
Source: https://docs.microsoft.com/en-us/windows/wsl/install-win10
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