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insertion - Python MySQLdb issues (TypeError: %d format: a number is required, not str)

I am trying to do the following insert operation: cursor.execute(""" insert into tree (id,parent_id,level,description ... is required, not str" See Question&Answers more detail:os...

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c++ - malloc() vs. HeapAlloc()

What is the difference between malloc() and HeapAlloc()? As far as I understand malloc allocates memory from the ... is the difference? Thanks! See Question&Answers more detail:os...

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cryptography - How to cryptographically hash a JSON object?

The following question is more complex than it may first seem. Assume that I've got an arbitrary JSON object, ... any approaches or thoughts =) See Question&Answers more detail:os...

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Android 4.4.2 - java.lang.RuntimeException: Performing stop of activity that is not resumed

I'm getting this exception on a 4.4.2 device. Not reproducible on Android 4.3 device or lower. Setup is I ... now causing problems in 4.4.x? See Question&Answers more detail:os...

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On page load event in Chrome extensions

I want to check some values in the content of chrome browser page when it completely loaded like that if(document.body ... " but I can't do See Question&Answers more detail:os...

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ssl - Android HttpClient and HTTPS

I'm new to implementing HTTPS connections in Android. Essentially, I'm trying to connect to a server using the ... there has any advice. Thanks! See Question&Answers more detail:os...

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How to access an existing sqlite database in Android?

So far we have developed apps in android that create database on runtime. We like to know how can we ... android app? Please provide detail See Question&Answers more detail:os...

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python - Calculate RGB value for a range of values to create heat map

I am trying to create a heat map with python. For this I have to assign an RGB value to every value in the ... have an idea? Thank you a lot! See Question&Answers more detail:os...

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Skewed dataset join in Spark?

I am joining two big datasets using Spark RDD. One dataset is very much skewed so few of the executor tasks ... How can I solve this scenario? See Question&Answers more detail:os...

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iphone - UICollectionView animations (insert/delete items)

I'd like to customize the animation styles when a UICollectionViewCell is inserted and/or deleted. The reason why I need ... } That's it! :) See Question&Answers more detail:os...

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oop - Checking Objective-C block type?

This is primarily a curiosity, I'm not really sure what's the practical use of this but here goes. Since blocks ... the correct way to do it? See Question&Answers more detail:os...

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java - How do I return a video with Spring MVC so that it can be navigated using the html5 <video> tag?

If I have a file in the web server (Tomcat) and create a tag, I can watch the video, pause it, ... ); return new FileSystemResource(path); } See Question&Answers more detail:os...

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c++ - How to merge two BST's efficiently?

How to merge two binary search trees maintaining the property of BST? If we decide to take each element from a tree and ... O(n1 * log(n2))? See Question&Answers more detail:os...

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jquery - How to keep footer at the bottom even with dynamic height website

How do I keep a footer div always at the bottom of the window when I have a page that dynamically set the height ... be at the end of your code; See Question&Answers more detail:os...

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optimization - Efficient 4x4 matrix multiplication (C vs assembly)

I'm looking for a faster and trickier way to multiply two 4x4 matrices in C. My current research is focused ... my battle against the machine? See Question&Answers more detail:os...

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javascript - HTML5 - how to get image dimension

I have this script, it's used to fetch the width and the height of browser uploaded image. reference: http:// ... function. How can I do that? See Question&Answers more detail:os...

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exception - BaseException.message deprecated in Python 2.6

I get a warning that BaseException.message is deprecated in Python 2.6 when I use the following user-defined ... rid of the deprecation warning? See Question&Answers more detail:os...

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matrix - Finding row index containing maximum value using R

Given the following matrix lets assume I want to find the maximum value in column two: mat <- matrix(c(1:3,7:9 ... index, in this case row two? See Question&Answers more detail:os...

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spring boot - java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7

I am getting this exception java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7 ... spring boot project. See Question&Answers more detail:os...

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html - Allow Access-Control-Allow-Origin header using HTML5 fetch API

I am using HTML5 fetch API. var request = new Request('https://davidwalsh.name/demo/arsenal.json'); fetch( ... the resource with CORS disabled. See Question&Answers more detail:os...

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android - adb shell su works but adb root does not

I rooted my unlocked Galaxy S3 (SGH-T999) Now, I'm trying to run adb root from Windows Command Prompt, ... commands WITHOUT going into shell. See Question&Answers more detail:os...

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syntax - Dot Operator in Haskell: need more explanation

I'm trying to understand what the dot operator is doing in this Haskell code: sumEuler = sum . (map euler) . ... sum . (map euler) . mkList See Question&Answers more detail:os...

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java - Custom Layout for DialogFragment OnCreateView vs. OnCreateDialog

I'm trying to create a DialogFragment using my own Layout. I've seen a couple different approaches. Sometimes ... adding content I'm stumped. See Question&Answers more detail:os...

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c++ - Is auto_ptr deprecated?

Will auto_ptr be deprecated in incoming C++ standard? Should unique_ptr be used for ownership transfer instead of ... to use shared_ptr instead? See Question&Answers more detail:os...

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spring security 403 error

I'm trying to secure my website using Spring security following the guides on the web. So on my server side ... . Please help. Thanks so much See Question&Answers more detail:os...

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Clear and refresh jQuery Chosen dropdown list

I'm trying to clear jQuery Chosen dropdown list and refresh it. HTML: <select data-placeholder="Select Picture..." ... list... Some help? :) See Question&Answers more detail:os...

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python - How to draw a line with matplotlib?

I cannot find a way to draw an arbitrary line with matplotlib Python library. It allows to draw horizontal and ... Is there a simple way? See Question&Answers more detail:os...

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node.js - Set up npm credentials over `npm login` without reading input from interactively from stdin

I'm trying to automate npm publish inside a Docker container but I have trouble when the npm login command ... npm login without stdin open? See Question&Answers more detail:os...

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

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