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How does one check if a table exists in an Android SQLite database?

I have an android app that needs to check if there's already a record in the database, and if not, process ... 's onCreate may work better... See Question&Answers more detail:os...

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

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combobox - HTML combo box with option to type an entry

I was under the impression you could type into a combo box besides selecting any values already in the list. ... to allow typing of text? See Question&Answers more detail:os...

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

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typescript - Select based on enum in Angular2

I have this enum (I'm using TypeScript) : export enum CountryCodeEnum { France = 1, Belgium = 2 } I would like ... /select> 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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Swift random float between 0 and 1

In Swift, I'm trying to get a random float between 0 and 1 but I can't seem to get the type conversions ... to 'UInt8' error Running Xcode 6. 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 - Find everything between two XML tags with RegEx

In RegEx, I want to find the tag and everything between two XML tags, like the following: <primaryAddress> < ... idea how to do that? 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# - Possible to access MVC ViewBag object from Javascript file?

Is it possible to do the following from a javascript file in an MVC application? $(function(){ alert( ... to undefined XML name @ViewBag See Question&Answers more detail:os...

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

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javascript - $ is not a function - jQuery error

I have the jQuery loaded fine, I've quadruple-checked, though I'm getting this error in FireBug "$ is not a ... ).addClass("olli20"); </script> See Question&Answers more detail:os...

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

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terminology - What are REST resources?

What are REST resources and how do they relate to resource names and resource representations? I read a few articles on ... , name: "Jane" } ] See Question&Answers more detail:os...

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

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What's the best way to open and read a file in Perl?

Please note - I am not looking for the "right" way to open/read a file, or the way I should open/read a ... of opening and reading in a file? 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 - Benefits of panda's multiindex?

So I learned that I can use DataFrame.groupby without having a MultiIndex to do subsampling/cross-sections. ... the hierarchies when printing? See Question&Answers more detail:os...

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

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javascript - How to get the html of a div on another page with jQuery ajax?

I'm using jQuery's ajax code to load new pages, but wanted him to get only the html of a div. My codes: HTML ... on another page. How to do it? See Question&Answers more detail:os...

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

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html - How to vertically center a Bootstrap carousel-caption?

I have a bootstrap carousel and I am trying to create a caption for the carousel that is always vertically ... ://www.bootply.com/aWK6oVRWVo 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 - Running Selenium scripts with JMeter

I have Selenium automation scripts ready with functional flow, now I want to integrate those scripts with ... load or performance testing. 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 - Jsoup Cookies for HTTPS scraping

I am experimenting with this site to gather my username on the welcome page to learn Jsoup and Android. ... incorrect? Something else? 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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Change the font of tab text in android design support TabLayout

I'm trying to work on the new TabLayout from the android design library. I want to change tab text to custom ... I change the tab text fonts. 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# - Query string not working while using attribute routing

I'm using System.Web.Http.RouteAttribute and System.Web.Http.RoutePrefixAttribute to enable cleaner URLs for my Web ... the routing method does. See Question&Answers more detail:os...

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

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Entity Framework Core service default lifetime

In ASP.NET Core application I can register DbContext through DI like this services.AddDbContext<Models.ShellDbContext>( ... as Scoped also? 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 store token in Local or Session Storage in Angular 2?

I want to use Local or session storage to save authentication token in angular 2.0.0. I use angular2-localstorage ... storage of Angular 2.0.0. 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 - Seek bar, change path color from yellow to white

I have two questions: 1) how do I change the color of the seek bar (path) from yellow (the default ... shape. any pointers will be 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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python - Filtering os.walk() dirs and files

I'm looking for a way to include/exclude files patterns and exclude directories from a os.walk() call. Here's ... better way to do this? How? See Question&Answers more detail:os...

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

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Different meanings of brackets in Python

I am curious, what do the 3 different brackets mean in Python programming? Not sure if I'm correct about ... any advice is welcomed! 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 set a facebook profile picture using the graph api

Is there any way to change the user's profile picture using the graph api? I know you can't with the rest ... anything in the new graph api. 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 - Nullable return types in PHP7

PHP 7 introduces return type declarations. Which means I can now indicate the return value is a certain class, interface ... { return 'hello'; } 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# - How do I generate a constructor from class fields using Visual Studio (and/or ReSharper)?

I've gotten accustomed to many of the Java IDEs (Eclipse, NetBeans, and IntelliJ IDEA) providing you with a ... Visual Studio that is obvious? See Question&Answers more detail:os...

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

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database - What's wrong with nullable columns in composite primary keys?

ORACLE does not permit NULL values in any of the columns that comprise a primary key. It appears that the ... more of a technical limitation? See Question&Answers more detail:os...

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

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283 views

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Increasing the timeout value in a WCF service

How do I increase the default timeout to larger than 1 minute on a WCF service? 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 - The easiest way to transform collection to array?

Suppose we have a Collection<Foo>. What is the best (shortest in LoC in current context) way to transform it to Foo[]? ... Bar(Foo foo){ ... } ? See Question&Answers more detail:os...

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

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What does ?: do in Kotlin? (Elvis Operator)

I can't figure out what ?: does in for example this case val list = mutableList ?: mutableListOf() ... null) mutableList else mutableListOf() See Question&Answers more detail:os...

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

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