arrays

问题 I am trying to read string variables from a single array (or more precisely from an array of arrays of strings , as clarified in the accepted answer) in Swift. The following reads the entire array. var array = [["W", "X", "Y", "Z"], ["A", "B", "C", "D"]] print(array[0],array[1]) How do I read a pair of variables, e.g. "X" and "D" ? 回答1: array is an array of arrays of strings. Or, type Array<Array<String>> . array[0] will return the first element of the array, which is an array of strings, or

问题 Good day I am trying to use an autocomplete jquery framework.. buy my problem is how can i get my objects either from a json file or just a quick typed json object like the below and get all the Object.values(arry) to a single array like below.. ["samue", "anthon", "Harmony", "Johnson"] and must be an array.. because auto complete frameworks only works with arrays const myobj = [ { "name": "samuel", "surname": "anthony" }, { "name": "Harmony", "surname": "Johnson" } ] const file = "json/user

问题 I am trying to read string variables from a single array (or more precisely from an array of arrays of strings , as clarified in the accepted answer) in Swift. The following reads the entire array. var array = [["W", "X", "Y", "Z"], ["A", "B", "C", "D"]] print(array[0],array[1]) How do I read a pair of variables, e.g. "X" and "D" ? 回答1: array is an array of arrays of strings. Or, type Array<Array<String>> . array[0] will return the first element of the array, which is an array of strings, or

问题 Good day I am trying to use an autocomplete jquery framework.. buy my problem is how can i get my objects either from a json file or just a quick typed json object like the below and get all the Object.values(arry) to a single array like below.. ["samue", "anthon", "Harmony", "Johnson"] and must be an array.. because auto complete frameworks only works with arrays const myobj = [ { "name": "samuel", "surname": "anthony" }, { "name": "Harmony", "surname": "Johnson" } ] const file = "json/user

问题 I have JSONArrays that needs to be compared which may have child entities inside it not in the same order though like this : [{ "A" : "IN", "B" : "DL"},{ "A" : "US", "B" : "KA"}] //JSONArray 1 [{ "A" : "US", "B" : "KA"},{ "A" : "IN", "B" : "DL"}] //JSONArray 2 Here is my code. Before calling JsonElemnt, I am converting both the JSONArray to String and then passing it to my function to compare : //Converting both JSONArray to String JsonArray1Str and JsonArray2Str JsonElement jsonElement1 =

问题 I am a novice at Python and helping out on a school project. Any help is much appreciated. THANKS. I get an error when it gets to the year 2004 and 2003. And it is caused by the result_list list. The error is "ValueError: arrays must all be same length". How can I introduce code that fixes this. The scores are important.... import requests import pandas as pd from pandas import ExcelWriter from bs4 import BeautifulSoup #from openpyxl.writer.excel import ExcelWriter import openpyxl #from

问题 I have a 4D Numpy array of shape (15, 2, 320, 320). In other words, each element of the [320 x 320] matrix is a matrix of size [15 x 2]. Now, I would like to compute the dot product for each element of the [320x320] matrix, then extract the diagonal array. Currently, I am using 2 "for" loops, and the code works well (see the snippet). However, the calculation speed is too slow (when I process a large data). Anyone can show me how to vectorize the computation without the loops. A = np.random

问题 I'm trying to parallelize operations on two dimensional array using joblib library in python. Here is the code I have from joblib import Parallel, delayed import multiprocessing import numpy as np # The code below just aggregates the base_array to form a new two dimensional array base_array = np.ones((2**12, 2**12), dtype=np.uint8) def compute_average(i, j): return np.uint8(np.mean(base_array[i*4: (i+1)*4, j*4: (j+1)*4])) num_cores = multiprocessing.cpu_count() new_array = np.array(Parallel(n

问题 What is the main difference in these two: val array: Array<Double> = arrayOf() vs val array: DoubleArray = doubleArrayOf() I know that one is using primitive data type double and the second its object based countrepart Double . Is there any penalty or disadvatnage in using plain DoubleArray ? Why I want to know: I am using JNI and for Double , I have to call jclass doubleClass = env->FindClass("java/lang/Double"); jmethodID doubleCtor = env->GetMethodID(doubleClass, "<init>", "(D)V");

问题 I am attempting to pull data from a dynamic table using JQuery, but every way I've tried turns the values into something else (the below code will return an "l" instead of the N/A I was expecting. I have tried using .each and .map as the function as well as .val .html and as you can see .text to pull the data. I am stuck as to why and what I am doing wrong. Any help would be greatly appreciated. HTML <table id="attendees" class="attendees"> <thead> <tr style="border-bottom: double;border