Recent questions tagged Arrays

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arrays - How to generate 6 different random numbers in java

I want to generate 6 different random numbers by using Math.random and store them into an array. How can I make sure ... (Math.random() * 49) ) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - how php array_multisort work?

i have some problem to understand array_multisort See how it sorts when two values are the same: $a1=array("Dog ... understand how it's working. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - python spark alternative to explode for very large data

I have a dataframe like this: df = spark.createDataFrame([(0, ["B","C","D","E"]),(1,["E","A ... started learning it. Could anyone help, please? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - A better php array_merge

I am looking to do this a better way without the need to hardcode the integers for $justPrices[$i]: ... on the surface relatively simple! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - array_values recursive php

Let's say I have an array like this: Array ( [id] => 45 [name] => john [children] => Array ( [45] ... first children array (the one with key 45) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Javascript filter check for multiple values?

I am wondering how I can return multiple values from an array like this: var countries = [ { key: "Spain", ... "Greece", doc_count: 1259 } ]; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - How can I selectively access elements returned by a Perl subroutine?

Say a Perl subroutine returns an array: sub arrayoutput { ...some code... return @somearray; } I want to access ... way in Perl to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - How much memory will a list with one million elements take up in Python?

There are more than a million subreddits on Reddit, according to redditmetrics.com. I wrote a script that repeatedly ... will this list take up? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Default value in Python unpacking

Is there a way to have a default value if the number of values to unpack is too little compared to the ... with default arguments. Thank you! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Java ArrayList IndexOutOfBoundsException despite giving an initial capacity

When I do ArrayList<Integer> arr = new ArrayList<Integer>(10); arr.set(0, 1); Java gives me ... indices immediately, just like arrays? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - How do I remove elements at a set of indices in a vector in MATLAB?

I have a vector with 100 elements. I have another vector with index positions of elements I want to remove from this vector. How do I do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Ambiguous Use of Subscript in Swift

I keep getting an error of "ambiguous use of subscript," in my Swift code. I don't know what's causing ... questionLabel.text = "(question)" } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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868 views

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arrays - Python: can I have a list with named indices?

In PHP I can name my array indices so that I may have something like: $shows = Array(0 => Array('id' => ... ')); Is this possible in Python? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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835 views

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arrays - How can I find unique rows in a matrix, with no element order within each row?

I have an array comprising n rows and 4 colums. Each of the four entries on the row is an integer, i.e., X ... complete this task? Thanks, S :-) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Get object keys with the highest value in Javascript

Imagine an object like this: var values = { "2": 1, "53": 2, "56": 4, "57": 9, "61": 2, "62 ... and it's answer couldn't really help me either. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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880 views

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arrays - Remove characters from a string in C

I only have access to 'C' and need to replace characters within a character array. I have not come ... -characters-in-a-string.html See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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939 views

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arrays - For-Each Loop Java Error ArrayIndexOutOfBoundsException

In my program I need a for-each loop which counts the number of evens in the given array and ... " java.lang.ArrayIndexOutOfBoundsException: 54 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - MATLAB: Matrix of pairwise differences

I have a Nx1 vector of values. What I would like to do is create a NxN matrix where each value represents ... this vector may get quite large. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Java ArrayLists into JList

OK so I'm doing a small part of my inventory. I got MOST of it down. I'm trying to add string items to ... public void paint(Graphics g) { } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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987 views

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arrays - golang prepend a string to a slice ...interface{}

I've a method that has as an argument v ...interface{}, I need to prepend this slice with a string. Here ... proper way to prepend in this case? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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801 views

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arrays - JavaScript null and plus (+) operatior

I am trying to understand the core of JavaScript. I know it doesnt have much implementation value. If you ... Thanks for reading the question. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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802 views

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arrays - Does joined() or flatMap(_:) perform better in Swift 3?

I'm curious about the performance characteristics of joined() and .flatMap(_:) in flattening a multidimensional array: ... to write the calls? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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830 views

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arrays - PHP: many concats or one implode?

In my current project I assemble one string out to many small strings (direct output is NOT an option). Would it ... to an array and implode it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - ArraySegment - Returning the actual segment C#

I have been looking around on ways to return the segment which is basically held by ArraySegment in terms of ... is slow via ArraySegments. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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798 views

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arrays - Simple persistent storage in Swift

I have an array of objects each with a number of properties. Here is some sample data taken by looping through ... forKey: "monthlyAverage") } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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888 views

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arrays - PHP array_merge with numerical keys

How can make it so array_merge() overwrites two keys with different values but same key index from two arrays? ... arrays have string keys... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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795 views

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arrays - Why java does not autobox int[] to Integer[]

When I do the following, arrayList1 - contains one element and it is an int[]. arrayList2 - not compiling ( ... stupidity or some other reason? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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832 views

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arrays - Why, if MATLAB is column-major, do some functions output row vectors?

MATLAB is well-known for being column-major. Consequently, manipulating entries of an array that are in the ... behind this design decision? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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