if-statement

问题 I would like to pick the closest previous owner within a set distance only after the first search condition isn't met. The locations are called reflo (reference location), and they have a corresponding x and y coordinates (called locx and locy , respectively). The conditions: if lifetime_census$reflo==owners$reflo.x[i] then condition is met if lifetime_census$reflo!=owners$reflo.x[i] , then find next closest record (within 30 meters) if there is no record within 30 meters, then assign NA

问题 The other day I asked how to wrap values of the first line of a csv file with quotations. I was given this reply which worked great. $ cat file.csv word1,word2,word3,word4,word5 12345,12346,12347,12348,12349 To put quotes around the items in the first line only: $ sed '1 { s/^/"/; s/,/","/g; s/$/"/ }' file.csv "word1","word2","word3","word4","word5" 12345,12346,12347,12348,12349 I now need to test if the quotes exist around the values to eliminate chances of double quoting values. 回答1: This

问题 The other day I asked how to wrap values of the first line of a csv file with quotations. I was given this reply which worked great. $ cat file.csv word1,word2,word3,word4,word5 12345,12346,12347,12348,12349 To put quotes around the items in the first line only: $ sed '1 { s/^/"/; s/,/","/g; s/$/"/ }' file.csv "word1","word2","word3","word4","word5" 12345,12346,12347,12348,12349 I now need to test if the quotes exist around the values to eliminate chances of double quoting values. 回答1: This

问题 I'm a beginner in coding. I was recently working with to create a chatting programme where a user will chat with my computer. Here is a part of the code: System.out.println("Hello, what's our name? My name is " + answer4); String a = scanner1.nextLine(); System.out.println("Ok, Hello, " + a + ", how was your day, good or bad?"); String b = scanner2.nextLine(); **if (b.equals("good"))** { //1 System.out.println("Thank goodness"); } else **if (b.equals("it was good"))** { //2 System.out.println

问题 I want to check if the role is agency then the output is $agencyUsers else if the role is officer then the output is $officeUsers else I need to output 'No Group' I try this but the output is 'No Group' for all users <td>{{ strtolower($user->getRoleNames()) === 'agency' ? $agencyUsers : strtolower($user->getRoleNames()) === 'officer' ? $officeUsers : 'No Group'}}</td> 回答1: You must wrap the second ternary in parentheses, this should work: strtolower($user->getRoleNames()) === 'agency' ?

问题 I'm trying to make a function that will compare multiple variables to an integer and output a string of three letters. I was wondering if there was a way to translate this into Python. So say: x = 0 y = 1 z = 3 mylist = [] if x or y or z == 0 : mylist.append("c") if x or y or z == 1 : mylist.append("d") if x or y or z == 2 : mylist.append("e") if x or y or z == 3 : mylist.append("f") which would return a list of ["c", "d", "f"] Is something like this possible? 回答1: You misunderstand how

问题 I have an issue where I want to segregate / split file based on search item into multiple files. if I see add I want to put that line to addfile . similar to changeprop , insert and if I cannot find any match then to otherfile . I'm unable to process the if else conditions. FOR /F "tokens=* delims=" %%a in ('TYPE "%File%"') DO ( SET "eachline=%%a" IF /i "!eachline:~0,3!" == "ADD " (ECHO !eachline!>>"%ADDActionScriptsMergedFile%") ELSE ( IF /i "!eachline:~0,9!" == "ADDINSERT" (ECHO !eachline!>

问题 I have a list of list of float lists and I want to test if a value pair (e.g. [2.0, 1.1]) is already in this list. Therefor I wrote a simple code to check this. As far as I understand my code it should always write the result array. I think the if statement is not correct formulated or is at least not doing what I intended to do. The result array should be look like: [0, 1, 2]. It is like a 'self-check'. import numpy as np array_a = np.asarray([[2.0, 1.1], [3.3, 4.4], [2.5, 3.0]]) array_a

问题 I need a little help with creating a loop in Python. Here's the code that I'm using: import pandas as pd import numpy as np import math import matplotlib.pyplot as plt from statsmodels.graphics.tsaplots import plot_acf from statsmodels.graphics.tsaplots import plot_pacf %matplotlib inline df= pd.read_csv('original_data.csv', index_col='1') from statsmodels.tsa.stattools import adfuller def adf_test(timeseries): #Perform Dickey-Fuller test: test_types = ['nc','c','ct'] for tests in test_types:

问题 I am trying to do the bellow: setlocal enabledelayedexpansion set choice= set /p choice="Select File Number, or no to exit: " if "%choice%"=="no" ( goto cleanup ) else ( set "!choice!=%choice%" start %file!choice!% pause ) what i want is to open a file where the variable is %filex% and be able to choose what file to open 来源： https://stackoverflow.com/questions/60470710/making-a-variable-dynamic-in-if-statement