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android - How to disable Button if EditText is empty ?

I have an EditText and a Button in my application. When the button is clicked,the text entered in the EditText is ... } How can i do this ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Cannot connect to Go GRPC server running in local Docker container

I have a go grpc service. I'm developing on a mac, sierra. When running a grpc client against the service locally, ... to serve: %v", err) } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - PDO Exception Questions - How to Catch Them

I'm using PDO to re-write a website interface for a database. I used to use the mysql extension, but I ... expected, just not using this code. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - onActivityResult With launchMode="singleTask"?

When you try to startActivityForResult for Activity that has launchMode="singleTask"; it will not return any values ... anyway to solve this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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"main" function in Lua?

In python, one would usually define a main function, in order to allow the script to be used as module ( ... function, which seems redundant)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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validation - How to set maxlength attribute on h:inputTextarea

How can I limit the length of <h:inputTextarea>? For <h:inputText> it works fine with maxlength attribute. ... unavailable in <h:inputTextarea>. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Retrieving the last inserted ids for multiple rows

When inserting data into a table which has an auto-incremented PK, I need to obtain that key for use ... common and advisable approaches are. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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io - How to read a struct from a file in Rust?

Is there a way I can read a structure directly from a file in Rust? My code is: use std::fs::File; ... from the file? Is this even possible? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - When do we do GetHashCode() for a Dictionary?

I have used Dictionary(TKey, TValue) for many purposes. But I haven't encountered any scenario to ... necessitate implementing these functions? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - numpy undefined symbol: PyFPE_jbuf

I am trying to use the One Million Song Dataset, for this i had to install python tables, numpy, cython, hdf5 ... know what else to try. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to search SQL column containing JSON array

I have a SQL column that has a single JSON array: {"names":["Joe","Fred","Sue"]} Given a search string, how ... (column, '$.names') = 'Joe' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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currying - Applying an argument list to curried function using foldLeft in Scala

Is it possible to do a foldLeft on a list of arguments, where the initial value supplied to the fold is a ... , or Category Theory in general. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Codeigniter session is not working on PHP 7

I am using codeigniter version 3.0.6 on PHP 5.6 and it works fine. but when I run same project on PHP ... $login_session it is blank on PHP 7 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python 2.7 - Quick implementation of character n-grams for word

I wrote the following code for computing character bigrams and the output is right below. My question is, how ... advance for your suggestions. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Commas within CSV Data

I have a CSV file which I am directly importing to a SQL server table. In the CSV file each column is ... SQL server. What should I do? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Do not request Window.FEATURE_ACTION_BAR issue

I'm trying to build my app but without success.. I tried several way but nothing was worked. The exception ... transparent and not colored... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Using jQuery inArray with array of JavaScript Objects

I'm working with an array of JavaScript Objects as such: var IssuesArray = [{"ID" : "1", "Name ... shortest most straightforward. Thanks again. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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windows - "invalid path 0 files copied" Error while using xcopy command

Hi I have this little command to copy files in a batch, which will help because I do this specific copy ... find that. Any help appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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oop - How to create a "single dispatch, object-oriented Class" in julia that behaves like a standard Java Class with public / private fields and methods

I read in a book that "you can't create traditional 'classes' in julia with single-dispatch-style ... where this might fail spectacularly? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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node.js - socket.io: Failed to load resource

I'm trying to getting started with socket.io and node.js. Following the first example on the socket.io's ... 've already installed socket.io.. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to get the current view name in asp.net MVC 3?

How can I get the current view name regarding to current URL, in asp.net MVC 3 using Razor engine? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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937 views

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algorithm - Python pi calculation?

I am a python beginner and I want to calculate pi. I tried using the Chudnovsky algorithm because I heard that it ... 10, 100, 1000, etc. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reflection - How do I retrieve the names of function parameters in matlab?

Aside from parsing the function file, is there a way to get the names of the input and output arguments to ... find the names of the functions. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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428 views

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iphone - How to use UIImagePickerController in iPad?

Hi i am working on a universal application (iPhone/iPad). one feature is that i have to select a photo from ... also googled it but in vain. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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670 views

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ajax - JavaScript cross-domain call: call from HTTP to HTTPS

I need to make an asynchronous call to a secure (HTTPS) URL for the same domain. Currently the page is ... support for this in modern browsers. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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388 views

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c# - Reset RTF in RichTextBox?

I'm trying to "reset" the formatting in my RichTextBox (WinForms, not WPF). I was previously using ... that produces undesirable flashing)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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490 views

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xamarin.android - Xamarin Forms Android Error: Please install package 'Android Support Library'

I recently uploaded my project to Git, and used a auto-generated Xamarin/Windows/MacOS/VisualStudio . ... Android Support Library installed See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css - when scaling an element with css3 scale, it becomes pixelated until just after the animation is complete. I'm animating an element with a border

http://jsfiddle.net/nicktheandroid/5Ytnj/ When I add -webkit-backface-visibility: hidden; to the .circ element, ... version of Google Chrome. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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