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jquery - Difference between $(window).load() and $(document).ready() functions

What is the difference between $(window).load(function() {}) and $(document).ready(function() {}) in jQuery? Question&Answers:os...

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

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Any way to select without causing locking in MySQL?

Query: SELECT COUNT(online.account_id) cnt from online; But online table is also modified by an event, so frequently ... is there a compatible way to do this? Question&Answers:os...

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

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javascript - React won't load local images

I am building a small react app and my local images won't load. Images like placehold.it/200x200 loads. I thought ... 'Listening at http://localhost:3000'); }); Question&Answers:os...

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

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android - Check if application is on its first run

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AngularJS 1.5+ Components do not support Watchers, what is the work around?

I've been upgrading my custom directives to the new component architecture. I've read that components do not support watchers. Is ... -box> </div> Question&Answers:os...

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

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Python Pandas - Find difference between two data frames

I have two data frames df1 and df2, where df2 is a subset of df1. How do I get a new data frame (df3) which ... all the rows/columns in df1 that are not in df2? Question&Answers:os...

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

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javascript - remove objects from array by object property

var listToDelete = ['abc', 'efg']; var arrayOfObjects = [{id:'abc',name:'oh'}, // delete me { ... index still leaves you with the problem of diminishing length. Question&Answers:os...

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What are the differences between JSON and JavaScript object?

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

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performance - Why are loops slow in R?

I know that loops are slow in R and that I should try to do things in a vectorised manner instead. But, ... should have been, "Why is vectorisation faster?" Question&Answers:os...

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c - Is it possible to iterate over arguments in variadic macros?

I was wondering if it is possible to iterate over arguments passed to a variadic macro in C99 or using any GCC extensions ? For ... a, a, b, c); return 0; } Question&Answers:os...

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

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json - Passing bash variable to jq

I have written a script to retrieve certain value from file.json. It works if I provide the value to jq select, but ... =="$EMAILID") | .id') echo "$projectID" Question&Answers:os...

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

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r - What does "The following object is masked from 'package:xxx'" mean?

When I load a package, I get a message stating that: "The following object is masked from 'package:xxx' For ... this message mean, and how do I prevent it? Question&Answers:os...

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selenium - What is the difference between cssSelector & Xpath and which is better with respect to performance for cross browser testing?

I am working with the Selenium WebDriver 2.25.0 on multilingual web application & mainly test the page ... Thanks in advance for your valueable suggestions. Question&Answers:os...

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c# - Find a private field with Reflection?

Given this class class Foo { // Want to find _bar with reflection [SomeAttribute] private string _bar; public string ... need to set to get the private fields? Question&Answers:os...

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javascript - Event detect when css property changed using Jquery

Is there a way to detect if the "display" css property of an element is changed (to whether none or block or inline-block...)? if not, any plugin? Thanks Question&Answers:os...

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

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c - How to share memory between processes created by fork()?

In fork child, if we modify a global variable, it will not get changed in the main program. Is there a way to change ... ); // this will display 1 and not 5. } Question&Answers:os...

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

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javascript - Difference between microtask and macrotask within an event loop context

I've just finished reading the Promises/A+ specification and stumbled upon the terms microtask and macrotask: see ... a short explanation given by an expert. Question&Answers:os...

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

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javascript - Resize HTML5 canvas to fit window

How can I automatically scale the HTML5 <canvas> element to fit the page? For example, I can get a <div> to scale by ... , but a <canvas> won't scale, will it? Question&Answers:os...

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

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c++ - Returning unique_ptr from functions

unique_ptr<T> does not allow copy construction, instead it supports move semantics. Yet, I can return a ... in the language specification that this exploits? Question&Answers:os...

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python - Apply vs transform on a group object

Consider the following dataframe: columns = ['A', 'B', 'C', 'D'] records = [ ['foo', 'one', 0.162003, 0.087469], ['bar ... '], 'C' : randn(8), 'D' : randn(8)}) Question&Answers:os...

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ios - The resource could not be loaded because the App Transport Security policy requires the use of a secure connection

I am facing the Problem when I have updated my Xcode to 7.0 or iOS 9.0. Somehow it started giving me ... Xcode 7 beta 6 https://stackoverflow.com/a/32609970 Question&Answers:os...

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

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html - Use images instead of radio buttons

If I have a radio group with buttons: ... how can I show only images in the select option instead of the buttons, e.g. Question&Answers:os...

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ASP.NET MVC 404 Error Handling

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

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How can I use a DLL file from Python?

What is the easiest way to use a DLL file from within Python? Specifically, how can this be done ... strongly preferred over using a third-party library. Question&Answers:os...

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

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What is the easiest/best/most correct way to iterate through the characters of a string in Java?

StringTokenizer? Convert the String to a char[] and iterate over that? Something else? Question&Answers:os...

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

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Draw path between two points using Google Maps Android API v2

Google changed its map API for Android and introduced API V2. The previous codes for drawing path are not working ... any answer. So I am sharing its answer. Question&Answers:os...

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

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Concrete Javascript Regex for Accented Characters (Diacritics)

I've looked on Stack Overflow (replacing characters.. eh, how JavaScript doesn't follow the Unicode standard ... the task? Or are there better solutions? Question&Answers:os...

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

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sql - Error Code: 2013. Lost connection to MySQL server during query

I got the Error Code: 2013. Lost connection to MySQL server during query error when I tried to add an index ... . Is there away to increase the timeout value? Question&Answers:os...

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

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