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How to sum a list of integers with java streams?

I want to sum a list of Integers. It works as follows, but the syntax does not feel right. Could the code be optimized? ... ().stream().mapToInt(i -> i).sum(); Question&Answers:os...

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

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javascript - Add/remove class with jquery based on vertical scroll?

So basically I'd like to remove the class from 'header' after the user scrolls down a little and add ... sure I'm doing something very elementary wrong. Question&Answers:os...

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

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How to add image and text in UITextView in IOS?

I want to add both text and image in UITextView. The textview should be expanded according to the length of ... image that how the UITextView will look like. Question&Answers:os...

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

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c# - How to determine if a type implements a specific generic interface type

Assume the following type definitions: public interface IFoo<T> : IBar<T> {} public class Foo<T> : IFoo<T> ... IBar<T> when only the mangled type is available? Question&Answers:os...

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

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xcode - Enterprise App Update Distribution on iOS 8

I have an enterprise app that I'm distributing via an itms URL: itms-services://?action=download-manifest&url=itms-services ... iOS 8, I'm running version 0.2.1 Question&Answers:os...

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

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Python "SyntaxError: Non-ASCII character 'xe2' in file"

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

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python - Generate a random date between two other dates

How would I generate a random date that has to be between two other given dates? The function's signature should be ... date such as: 2/4/2008 7:20 PM Question&Answers:os...

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

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java - How to persist a property of type List<String> in JPA?

What is the smartest way to get an entity with a field of type List persisted? Command.java package persistlistofstring; import ... .java:30) > Caused by: > ... Question&Answers:os...

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

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css - What does flex: 1 mean?

As we all know, the flex property is a shorthand for the flex-grow, flex-shrink, and the flex-basis properties. ... it means and I get nothing when I google. Question&Answers:os...

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

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java - When to use EntityManager.find() vs EntityManager.getReference() with JPA

I have come across a situation (which I think is weird but is possibly quite normal) where I use the ... situation similar to mine with the above exception. Question&Answers:os...

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

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big o - Time complexity of Euclid's Algorithm

I am having difficulty deciding what the time complexity of Euclid's greatest common denominator algorithm is. This ... there a better way to write that? Question&Answers:os...

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

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Which types can be used for Java annotation members?

Today I wanted to create my first annotation interface following this documentation and I got this compiler error ... which types are actually allowed and why. Question&Answers:os...

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

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c# - What is AsyncCallback?

What is the use of AsyncCallback and why should we use it? Question&Answers:os...

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

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javascript - Case-insensitive search

I'm trying to get a case-insensitive search with two strings in JavaScript working. Normally it would be like this: ... ; alert(result); How can I achieve this? Question&Answers:os...

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

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configuration - Nginx 403 error: directory index of [folder] is forbidden

I have 3 domain names and am trying to host all 3 sites on one server (a Digital Ocean droplet) using Nginx. ... 't help. Any ideas on what might be wrong? Question&Answers:os...

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

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python - Pretty Printing a pandas dataframe

How can I print a pandas dataframe as a nice text-based table, like the following? +------------+---------+-------------+ ... --------+---------+-------------+ Question&Answers:os...

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

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86 views

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How to use jQuery with TypeScript

I am trying $(function(){ alert('Hello'); }); Its showing this error in Visual Studio: (TS) Cannot find name '$'.. How can I use jQuery with TypeScript ? Question&Answers:os...

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

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regex - Regular expression to allow spaces between words

I want a regular expression that prevents symbols and only allows letters and numbers. The regex below works great, but ... How can I tweak it to allow spaces? Question&Answers: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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how to change color of TextinputLayout's label and edittext underline android

I am using android design library's TextinputLayout. But couldn't customize the hint color, label color ... of EditText inside TextinputLayout. Please help. Question&Answers:os...

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

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c++ - Removing leading and trailing spaces from a string

How to remove spaces from a string object in C++. For example, how to remove leading and trailing ... repeatedly at word boundaries to get desired formatting. Question&Answers:os...

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

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encoding - Android. WebView and loadData

It's possible to use following method for content's setting of a web-view loadData(String data, String mimeType, ... I'll be very thankful for any advice. Question&Answers:os...

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

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What is meant by Scala's path-dependent types?

I've heard that Scala has path-dependent types. It's something to do with inner-classes but what does this actually mean and why do I care? Question&Answers:os...

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

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hyperlink - Android TextView with Clickable Links: how to capture clicks?

I have a TextView which is rendering basic HTML, containing 2+ links. I need to capture clicks on the links and ... , and then lets you respond to the URL. Question&Answers:os...

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

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ASP.NET MVC partial views: input name prefixes

Suppose I have ViewModel like public class AnotherViewModel { public string Name { get; set; } } public class ... s a similar question with no answer here. Question&Answers:os...

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

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410 views

1 answer

postgresql - How to perform update operations on columns of type JSONB in Postgres 9.4

Looking through the documentation for the Postgres 9.4 datatype JSONB, it is not immediately obvious to me ... somewhere obvious that I missed? Thanks. Question&Answers:os...

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

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80 views

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Django Cookies, how can I set them?

I have a web site which shows different content based on a location the visitor chooses. e.g: User enters ... setting a cookie. Any help is greatly appreciated. Question&Answers:os...

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

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119 views

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sql - IN vs ANY operator in PostgreSQL

What is the difference between IN and ANY operator in PostgreSQL? The working mechanism of both seems to be the same. Can anyone explain this with an example? Question&Answers:os...

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

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148 views

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How to generate a Makefile with source in sub-directories using just one makefile

I have source in a bunch of subdirectories like: src/widgets/apple.cpp src/widgets/knob.cpp src/tests/blend.cpp ... it needs to make build/widgets/apple.o ? Question&Answers:os...

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

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