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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is there an efficient way to identify the last character/string match in a string using base functions? I.e. not the last character/string of the string, but the position of a character/string's last occurrence in a string. Search and find both work left-to-right so I can't think how to apply without lengthy recursive algorithm. And this solution now seems obsolete. 回答1: I think I get what you mean. Let's say for example you want the right-most \ in the following string (which is stored in cell A1): Drive:\Folder\SubFolder\Filename.ext To

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am a Python newbie writing a Python (2.7) script that needs to exec a number of external applications, one of which writes a lot of output to its stderr stream. What I am trying to figure out is a concise and succinct way (in Python) to get the last N lines from that subprocess' stderr output stream. Currently, I am running that external application from my Python script like so: p = subprocess . Popen ( '/path/to/external-app.sh' , stdout = subprocess . PIPE , stderr = subprocess . PIPE ) stdout , stderr = p . communicate () if

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Given a numpy array (or pandas dataframe) like this: import numpy as np a = np.array([ [1, 1, 1, 0.5, np.nan, np.nan, np.nan], [1, 1, 1, np.nan, np.nan, np.nan, np.nan], [1, 1, 1, 0.5, 0.25, 0.125, 0.075], [1, 1, 1, 0.25, np.nan, np.nan, np.nan], [1, np.nan, np.nan, np.nan, np.nan, np.nan, np.nan], [1, 1, 0.5, 0.5, np.nan, np.nan, np.nan] ]) I'm looking to most efficiently retrieve the last non-nan value in each row, so in this situation I'd be looking for a function that returns something like this: np.array([3, 2, 6, 3, 0, 3]) I can try np

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am trying to get the last message from each conversation, the only problem is I am not using a conversations table. I am using one messages table, my table columns looks like this: id from_id to_id text isread isseen created_at updated_at Right now I am able to retrieve conversations like this: $messages = Message :: select ( '*' )-> from ( DB :: raw ( "(select * from `messages` where `to_id` = " . Auth :: id (). " order by `created_at` desc) as sub" ))-> groupBy ( 'from_id' )-> orderBy ( 'created_at' , 'desc' )-> paginate ( 7 );

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm reading a file.txt using StreamReader and writing using streamWriter . ? i'm inserting lines, but sometimes one of these inserts are string.empty . Then It goes to an exception`that I created... In this exception, I want to delete that line I just inserted. But I recreate the file, or something like that, I need just to remove/erase/delete the last line. May I do that ? MyCode: IF you guys have another way to do this, i'd be very thankfull ! using (StreamWriter streamW = new StreamWriter(fileFinal, true)) { if (contador == numeroCampos)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have code like this: package main import ( "text/template" "os" ) func main() { type Map map[string]string m := Map { "a": "b", "c": "d", } const temp = `{{range $key, $value := $}}key:{{$key}} value:{{$value}},{{end}}` t := template.Must(template.New("example").Parse(temp)) t.Execute(os.Stdout, m) } it will output : key:a value:b,key:c value:d, but I want something like this: key:a value:b,key:c value:d I don't need the last comma, how to remove it. I found a solution for looping an array here: https://groups.google.com/d/msg/golang-nuts

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: My dataframe is similar like this: Person W.1 W.2 W.3 W.4 W.5 1 62 57 52 59 NA 2 49 38 60 NA NA 3 59 34 NA NA NA Is there a way to select the first and last test without "NA". I have 300 data entries, and W.1 means the first test, W.2 means the second test, W.n means the nth test. I want to compare the score of the first test with the score of the last test. For example, I want to compare: 1 62 59 2 49 60 3 59 34 But different persons have different places having "NA", can someone help me? Thank you! 回答1: You can use this solution: > t(apply

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to write a simple script that gets the child count of a GameObject and then destroys the last child (I want it to basically function like a delete key) but I'm getting the error: Can't remove RectTransform because Image (Script) depends on it . Can someone tell me how to resolve this? using UnityEngine; using System.Collections; using UnityEngine.EventSystems; public class DeleteSymbol : MonoBehaviour, IPointerClickHandler { public GameObject deleteButton; public GameObject encodePanel; public GameObject decodePanel; #region

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am having an issue executing the following script using Flyway and H2 database. I assume its a Oracle compatibility issue but I am using H2 with the correct mode. This script is used to construct my tables in production but I want to use an in-memory database for testing purposes. Setup and error below. I don't want rewrite the scripts for an in-memory database if thats possible. Jdbc.properties jdbc.driver=org.h2.Driver jdbc.url=jdbc:h2:file:target/firmsoftDB;MODE=Oracle jdbc.username=sa jdbc.password= Sql Script CREATE TABLE USER_INFO (

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: A month ago I solved my applcation freezing issues for Python 2.7 as you can see here . I have since adapted my code to python 3.5 (using Anaconda) and it appears to be working. couldn't get pyinstaller working with Anaconda so switched to trying to generate an .exe using the standard Python 3.5 compiler. I am using the same settings as in the link above ( pyinstaller --additional-hooks-dir=. --clean --win-private-assemblies pipegui.py ), except I get the following error message instead: `Exception: Cannot find PyQt5 plugin directories` This