Recent questions tagged Arrays

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arrays - Where is it legal to use ruby splat operator?

Splats are cool. They're not just for exploding arrays, although that is fun. They can also cast to Array ... splat appear in an expression? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - How to speed up matrix multiplication in C++?

I'm performing matrix multiplication with this simple algorithm. To be more flexible I used objects for the matricies ... size 13 (block). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - How to replace values at specific indexes of a python list?

If I have a list: to_modify = [5,4,3,2,1,0] And then declare two other lists: indexes = [0,1, ... this? Could I use operator.itemgetter somehow? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - calculating the number of “inversions” in a permutation

Let A be an array of size N. we call a couple of indexes (i,j) an "inverse" if i < j and A[i] > A[j] ... of inverses in time of O(n*log(n)). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - How to combine the sequence of objects in jq into one object?

I would like to convert the stream of objects: { "a": "green", "b": "white" } { "a": "red", " ... and googling doesn't find the answers either. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - inverting image in Python with OpenCV

I want to load a color image, convert it to grayscale, and then invert the data in the file. What I need: ... are having much (if any) change. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - warning: format ‘%s’ expects type ‘char *’, but argument 2 has type ‘char (*)’

I am trying to run a simple C program but I am getting this error: warning: format %s' expects type char *', but ... ! ", me); return (0); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Is indexing vectors in MATLAB inefficient?

Background My question is motivated by simple observations, which somewhat undermine the beliefs/assumptions often held/made ... 6; end toc end See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Maximum sum of non consecutive elements

Given an array of positive integers, what's the most efficient algorithm to find non-consecutive elements from ... produce the maximum sum? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Java ArrayList how to add elements at the beginning

I need to add elements to an ArrayList queue whatever, but when I call the function to add an element, I ... . Does anyone have any suggestions? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Appending an element to the end of a list in Scala

I can't add an element of type T into a list List[T]. I tried with myList ::= myElement but it seems it ... list. How can I solve this problem? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Correct way to initialize empty slice

To declare an empty slice, with a non-fixed size, is it better to do: mySlice1 := make([]int, 0) or ... wondering which one is the correct way. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - How to deserialize dodgy JSON (with improperly quoted strings, and missing brackets)?

I am having to parse (and ultimately reserialize) some dodgy JSON. it looks like this: { name: "xyz", id: ... in and out of this structure? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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682 views

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arrays - list items are not deleting properly (React)

I'd appreciate some help with my note taking app. Let's say I have 3 notes on my notes list. I want to delete the note ... > </div> </div> ) } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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911 views

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arrays - sorting object Sunday to Saturday in javascript

Hello Everyone i know this question is asked several time but i am not getting exact answer to my question. // ... "Saturday", TotalCount:30} ]; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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984 views

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arrays - Java Modifying Elements in a foreach

I'm learning Java on my own; and therefore the code below has no function other than for learning/testing. ... I doing wrong? Thank you See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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903 views

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arrays - Calculate the derivative of a vector

I have the following function (Viviani's curve): Phi = @(t)[ cos(t)^2, cos(t)*sin(t), sin(t) ] Just a ... in t = 0). How can I achieve this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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924 views

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arrays - How to have a stable sort in PHP with arsort()?

i need to sort an array in php based on value, array use some numbers for keys and values, for example like this: $a = ... ] => 1 [70] => 1 ) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Python list([]) and []

from cs1graphics import * from math import sqrt numLinks = 50 restingLength = 20.0 totalSeparation = 630.0 elasticityConstant ... way to do it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Abort trap 6 error in C

I have this code: void drawInitialNim(int num1, int num2, int num3) { int board[2][50]; //make an array with ... error, and they don't help me. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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arrays - Converting 2 bytes to Short in C#

I'm trying to convert two bytes into an unsigned short so I can retrieve the actual server port value. I'm basing ... I doing it the wrong way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - how to combine duplicate rows and sum the values 3 column in excel

Hello everyone, I have a problem to create VBA excel to duplicate data. How to combine duplicate rows and sum ... column in excel? Thank you. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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851 views

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arrays - Matching up two vectors in R

I have two vectors in R as shown below. The first one represents amino acid numbers with some positions missing while ... 829 830 831 [289] 832 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Python Numpy TypeError: ufunc 'isfinite' not supported for the input types

Here's my code: def topK(dataMat,sensitivity): meanVals = np.mean(dataMat, axis=0) meanRemoved = dataMat - ... (an example would be great!) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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956 views

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arrays - jQuery .inArray() always true?

I'm trying to use inarray but its always returning true? Any ideas? (all li's are showing) $("#select-by-color- ... -list li#army").show(); }; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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761 views

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arrays - C# params object[] strange behavior

Considering this code namespace ConsoleApplication1 { class Program { static void Main(string[] args) { string[] ... version / Mono version? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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899 views

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arrays - Time Complexity for Java ArrayList

I found other entries for this question that dealt with specific methods, but nothing comprehensive. I'd like to ... ? Thanks for your help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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713 views

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arrays - Is A==0 really better than ~A?

Introduction to problem setup I was doing some benchmarks involving - ~A and A==0for a double array with no NaNs, ... So what's going on there? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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