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问题 I need to know how can I connect with pervasive database via php. As I know, I have to use ODBC . I configured it on my Windows 7 system and I created table in pervasive server. This is my code, but it does not work: $connect_string = "DRIVER={Pervasive ODBC Client Interface}; SERVERNAME=localhost; SERVERDSN=demodata;"; $conn = odbc_connect($connect_string, 'root', 'root'); 回答1: You probably already have the ODBC drivers installed; I obtained the latest by installing the Pervasive Client from

问题 This question already has answers here : Define Powershell variable to have a value of a list (6 answers) Closed 2 months ago . I have this code: $a1 = "value1" $a2 = "value2" $a3 = "value3" $a4 = "value4" $a5 = "value5" DO { "Starting Loop $a1" $a1 $a1++ "Now `$a is $a1" } Until ($a1 -eq "value5") i try to make the loop stop once it reach value5 . The question is how i can go pass through all the variables, so if $a1 is not value5 it go to $a2 . Thanks. 回答1: What you're trying ⚠️ You might

问题 I validated my oai code in openarchives.So many error.Cleared mostly.But still have 2 errors.It shows error like 'FAIL POST test 1 for Identify was unsuccessful, an OAI error response was received'.Anyone know what kind of error is this.Attached error image Thank you 回答1: It looks like your OAI server does not accept POST requests for these verbs. OAI servers are expected to treat POST and GET requests in the same way. For instance, these two requests give the same result: curl -d "verb

问题 I'm trying to create an app where people can upload a CSV and then interact with the data. The specific issues is I'm failing to pass the column headers from the file that is read in to the selectInput function. If you comment out the last few lines for the observe function the app works fine. Have tried a number of options, using reactive instead of renderTable etc. There are some similar questions around addressing changing the select input but none that I could see from a file read in.

问题 I created a number of classes I want to persist to the database. I would like to be able to run the app with a specific flag to take all those classes and create the corresponding tables in my db. To that end, I'm trying to import the classes and then call the Base.metadata.create_all(engine) method. However, that doesn't work. At the same time, when I call that from the file with each of those actual classes, the tables are created. How do I go about the task of creating those tables? Should

问题 Consider this example data_frame(mylabel = c('month 18', 'month 19', 'month 20', 'month 21', 'month 22'), value = c(5,10,-2,2,0), time = c(1,2,3,4,5)) %>% ggplot(aes( x= time, y = value, color = mylabel)) + geom_point(size = 7) Here you can see that the variable mylabel has a natural ordering: month 18 comes before month 19 etc. However, this natural ordering is not preserved by the colors chosen by ggplot . In my real dataset, I have about 50 different months and I would like to use a color

问题 I'm doing an at-home project basically just for fun but I'm having more trouble than anticipated. I want to be able to find the pitch mark in this sample image. enter image description here I've followed some tutorials and things to load the image from a location and run simple blob detection on the image. My code currently is as follows -> import cv2 import numpy as np # Read in the image in grayscale img = cv2.imread('/home/pi/Downloads/divot1.jpeg', cv2.IMREAD_GRAYSCALE) params = cv2

问题 I validated my oai code in openarchives.So many error.Cleared mostly.But still have 2 errors.It shows error like 'FAIL POST test 1 for Identify was unsuccessful, an OAI error response was received'.Anyone know what kind of error is this.Attached error image Thank you 回答1: It looks like your OAI server does not accept POST requests for these verbs. OAI servers are expected to treat POST and GET requests in the same way. For instance, these two requests give the same result: curl -d "verb

问题 If I have a 32-bit integer BSD device number dev_t (e.g. 0x1000004) on macOS (Darwin), how can I get the corresponding filesystem path for this device (e.g. "/dev/disk1s4")? 回答1: You have to enumerate the mounted file systems and look for one who's device ID matches. You can use getfsstat() for the enumeration. That fills in struct statfs structures. Compare the field f_fsid.val[0] of each structure to the dev_t you're looking for. If they match, then that struct statfs is the one for the

问题 In the ConfigureServices method I'm using: var loggerFactory = new LoggerFactory(); loggerFactory.AddDebug(); However, use of LogDebug() fails to output to the debug console. 回答1: Rather than rely on AddDebug()... specify the minimum log level with AddConsole() and the debug level information outputs to the console as expected: loggerFactory.AddConsole(LogLevel.Debug); This works because the methods AddConsole(), AddDebug() etc. only specify where to log information. The issue is discussed in