WeChat QR Code

91 ® 编程问答







I am currently working on a Computer Based Test Software application (C#/WPF) in my project there are test questions specially formatted and some with special characters, e.g Mathematics subscript and

Raspberry pi在USB驱动器中读取文本文件

I am writing a python program to read a text file in USB connected to raspberry pi my query is whether it is possible to read text file inside the USB drive connected to raspberry pi or not if yes


I am wonder if categorical_crossentropy for semantic segmentation is good?Here's what I do:#test mode K.set_learning_phase(0)#m is a model load weights from what Itrained m.load_weights(load)


I have an array, which looks like this:array:3 [▼"field" => array:2 [▼0 => "fromName"1 => "from"]"operator" => array:2 [▼0 => "="1 => "="]"value"


I'm trying to extract the long int data only from /proc/meminfo. A sample of the file is below. I can do this, but a long known mantra in Linux is, do one thing, and do it well. It irks me that I'm


Can i add more fields to django password reset forms?like username fields , and if username and email is valid, the password reset link will be sent to emailplease help mei want to password reset


I have a Python program that lists all folders in a directory. It then proceeds to process them in an appropriate way. However, I need this program to treat shortcuts to folders the same way it would


I'm trying to make a text display in DOM from a->b->c->d->e with a 1-second delay between each alphabet using setTimeout. However, the result came out as letter changing from 'a' an immediately to 'e'


For example, i have two scenario for creating a user :Created by administrator, without password. The user will have to choose it on activation page.Created by the user himself, with password. The


I created two view controllers likeNavigation controller -> View Controller -> Details View Controller1 23The (2) View Controller has a


I would like to know how can I load a Thymeleaf template on page from a JAR file.Now i have a common-web jar, this have header.html.But in another web project that use spring boot + thymeleaf, i


I have a simple JSON{"message":"otp verified","type":"success"}How do i decode this in PHP


Im trying to use crawlera alongside splash local instance, this is my lua scriptfunction main(splash)function use_crawlera(splash)local user = splash.args.crawlera_userlocal host = '

在ITEXT 7行之间添加画布

Is it possible to add canvas along with the addParagraph to the document? i have long text(1000 page).I need to add canvas between text in certain places(graphics, shapes, etc.).For example, if


I've got a very strange question. Say I am implementing an object that has a toString() method that returns a single string formatted in a square, as such:010203040506070809Now, clearly the

Chris Moody的随机高亮条?警报?

Can anyone tell me how precisely to set up alerts on tradingview (i do know how to set up alerts..) specific to the "Strict Buy" criteria in the CM_Stochastic Highlight Bars indicator??? I have done a


I want to implement collision detection for a manufactoring machine. The machine has several rotative und linear axes. parts that can collide within the machine can be approximated with bounding


I would like to create an individual vim command that does the following:save the current filerun the current file with pythonCurrently I have to do it like this::w:! python3 {filename}


There are $n$ different balls numbered 1, 2, … , $n$. Let $S$ denote the set of those balls. There are $k$ boxes to which balls can be allocated. The full set $S$ is available to each of the $k$ boxes.


I have two lists and I wanted to create generate the quotients using a for loop. Specifically, I would want to have .5 and .25 and .125 and in that order. Of course, I could just take these values and


Hello everyone : I have struggle with this for some time now.I have a Model as under:class Job(db.Model):__tablename__ = "job"id = db.Column(db.Integer, primary_key=True)title = db.


Iam doing a project on laravel.I have 2 tablestable 1 - countries with unique idsenter image description heretable -2 - bloglistsenter image description hereMy view shows the bloglist data


I am quite new to Isotope and jQuery, and have trouble filtering my results on page load. The Isotope works, but when I tried to apply a filter .155282971747-digital-marketing" (instead of *) per


Apologies if this is a duplicate question.I built a basic login system using PHP. I am able to login and logout on one page only (index.php). The session variable somehow gets lost somewhere when I


I have to get the selected option's id.This way returns always the first id, it returns "1" :function myFunction() {var skills = document.getElementById('toto');var skillId = skills.


I'm a beginner in C. I am having trouble with this array function. When I call the function, it will ask for the input of a pair of numbers (key, value) each time, and store it in a one-dimensional


I'm using built in login view in django 2.1Is there any way to change the password field lable?


I am trying to run Saxon HE from java, using code that can be found in Saxon resources. I have tried changing it so that it doesn't create an aditional file from the java code, but instead having the


Besides Unix and GPS are there any other timestamp formats that GPS devices use?I am trying to decode the timestamp sent by one of my GPS devices but I cannot understand what sort of data it is.It


I'm inserting a record into my DB each time the cron job runs my script and that works. When the PHP script reaches an include file, the functionality in the included file doesn't finish. When I run



Here is a piece of C++ code that seems very peculiar. For some strange reason, sorting the data miraculously makes the code almost six times faster.#include <algorithm>#include <ctime>#


I accidentally committed the wrong files to Git, but I haven't pushed the commit to the server yet.How can I undo those commits from the local repository?


I want to delete a branch both locally and on my remote project fork on GitHub.Failed Attempts to Delete Remote Branch$ git branch -d remotes/origin/bugfixerror: branch 'remotes/origin/bugfix'


Moderator Note: Given that this question has already had sixty-seven answers posted to it (some of them deleted), consider whether or not you are contributing anything new before posting another one.


I've been messing around with JSON for some time, just pushing it out as text and it hasn't hurt anybody (that I know of), but I'd like to start doing things properly.I have seen so many purported "


What is the use of the yield keyword in Python? What does it do?For example, I'm trying to understand this code1:def _get_child_candidates(self, distance, min_dist, max_dist):if self.


After reading Hidden Features and Dark Corners of C++/STL on comp.lang.c++.moderated, I was completely surprised that the following snippet compiled and worked in both Visual Studio 2008 and G++ 4.4.


I mistakenly added files to git using the command:git add myfile.txtI have not yet run git commit. Is there a way to undo this, so these files won't be included in the commit?There are 48


How can I redirect the user from one page to another using jQuery or pure JavaScript?


I wrote the wrong thing in a commit message. Alternatively, I've forgotten to include some files.How can I change the commit message/files? The commit has not been pushed yet.


How would you explain JavaScript closures to someone with a knowledge of the concepts they consist of (for example functions, variables and the like), but does not understand closures themselves?I


Programming language books explain that value types are created on the stack, and reference types are created on the heap, without explaining what these two things are. I haven't read a clear


Usually I would expect a String.contains() method, but there doesn't seem to be one. What is a reasonable way to check for this?


I don't want to rename a remote branch, as described in Rename master branch for both local and remote Git repositories.How can I rename a local branch which hasn't been pushed to a remote branch?


It is possible to toggle the visibility of an element, using the functions .hide(), .show() or .toggle().How would you test if an element is visible or hidden?


Recently, I ran some of my JavaScript code through Crockford's JSLint, and it gave the following error:Problem at line 1 character 1: Missing "use strict" statement.Doing some searching, I


I have an array of Numbers, and I'm using the .push() method to add elements to it.Is there a simple way to remove a specific element from an array? The equivalent of something like array.remove(


How come certain random strings produce colors when entered as background colors in HTML? For example:<body bgcolor="chucknorris"> test </body>produces a document with a


How do I revert from my current state to a snapshot made on a certain commit?If I do git log, then I get the following output:$ git logcommit a867b4af366350be2e7c21b8de9cc6504678a61b`Author: Me &


Can I use comments inside a JSON file? If so, how?

var函数名=函数(){{} vs函数函数名(){}

I've recently started maintaining someone else's JavaScript code. I'm fixing bugs, adding features, and also trying to tidy up the code and make it more consistent.The previous developer uses two


If I run the following program, which parses two date strings referencing times 1 second apart and compares them:public static void main(String[] args) throws ParseException {SimpleDateFormat


How do you delete untracked local files from your current working tree?


Somebody pushed a branch called test with git push origin test to a shared repository. I can see the branch with git branch -r.Now I'm trying to check out the remote test branch.I've tried:git


How do I force an overwrite of local files on a git pull?The scenario is following:A team member is modifying the templates for a website we are working onThey are adding some images to the


Example (note the case):string s = "Hello world!";String s = "Hello world!";What are the guidelines for the use of each? And what are the differences?


I always thought Java was pass-by-reference.However, I've seen a couple of blog posts (for example, this blog) that claim that it isn't.I don't think I understand the distinction they're making.


I'm using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing idSele_UNVEHtype.value.


What is the difference between Android units of measure?pxdipdpsp


Say I create an object as follows:var myObject = {"ircEvent": "PRIVMSG","method": "newURI","regex": "^http://.*"};What is the best way to remove the property regex to end up with