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Heroku + node.js: I have a server which uses multiple ports. How can I get Heroku to allocate them?

Umm I'll try to be more clear.. In an application server I have written in node.js, I have inner- ... s getting really frustrating. Thanks! Amit See Question&Answers more detail:os...

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how to bind img src in angular 2 in ngFor?

In my project I am getting data: image src, student name and student id. I bind student name and student id. ... bind image src in angular 2 ? See Question&Answers more detail:os...

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python - PyQt5 failing import of QtGui

I've just moved from PyQt4 to 5 and I'm having an issue with QtGui. I installed using the 32bit windows ... is QDialog and they seem important) See Question&Answers more detail:os...

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Hibernate 5 java.lang.NoSuchMethodError org.jboss.logging.Logger.debugf

I have a problem when I deploy a webapp with hibernate 5 Caused by: java.lang.NoSuchMethodError: org.jboss.logging.Logger. ... ------------ See Question&Answers more detail:os...

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java - Spring @Value annotation always evaluating as null?

So, I have a simple properties file with the following entries: my.value=123 another.value=hello world This ... just fine. What gives? See Question&Answers more detail:os...

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javascript - If I set only a high index in an array, does it waste memory?

In Javascript, if I do something like var alpha = []; alpha[1000000] = 2; does this waste memory somehow? I ... delete. I can't really remember. See Question&Answers more detail:os...

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rest - http post - how to send Authorization header?

How do you add headers to your http request in Angular2 RC6? I got following code: login(login: String, password: String): ... ;q=0.8,pl;q=0.6 See Question&Answers more detail:os...

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html - How do I make flex box work in safari?

How do I make flex boxes work in Safari? I have a responsive nav that uses a CSS flex box to be responsive and for ... ="#">Australia</a> </nav> See Question&Answers more detail:os...

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java - Why can't I refer to an instance method while explicitly invoking a constructor?

Does anyone know why you can reference a static method in the first line of the constructor using this() or super(), ... ()); return a; } } See Question&Answers more detail:os...

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c# - Auto highlight text in a textbox control

How do you auto highlight text in a textbox control when the control gains focus. See Question&Answers more detail:os...

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c# - Sorting Files by date

I am using such code to compare files to sort by date.. FileInfo f = new FileInfo(name1); FileInfo f1 = ... by getting all files from directory. See Question&Answers more detail:os...

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generics - Java interfaces and return types

Consider I have the following interface: public interface A { public void b(); } However I want each of the ... so that this was possible? See Question&Answers more detail:os...

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'receive-pack': service not enabled for './.git'

(Solved already, I'm writing this for the next guy) I was running git daemon on one computer and tried ... please go ahead and add it. See Question&Answers more detail:os...

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How to use provided scope for jar file in Gradle build?

I need to use Amazon Maps and Amazon Messaging in my apps. With gradle, I did not succeed in adding the ... share your build.gradle file here. See Question&Answers more detail:os...

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c++ - Legal to overwrite std::string's null terminator?

In C++11, we know that std::string is guaranteed to be both contiguous and null-terminated (or more ... -terminator with a null character? See Question&Answers more detail:os...

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c# - How to create an extension method for ToString?

I have tried this: public static class ListHelper { public static string ToString<T>(this IList<String> list ... need some special annotations? See Question&Answers more detail:os...

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PHP: Get n-th item of an associative array

If you have an associative array: Array ( [uid] => Marvelous [status] => 1 [set_later] => Array ( [0] = ... But it just produces a blank entry. See Question&Answers more detail:os...

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javascript - res.sendfile in Node Express with passing data along

Is there any way to redirect to an HTML file from a Node.JS application with something like: res.sendFile of ... data along to the html file? See Question&Answers more detail:os...

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android - getSystemServices is undefined when called in a Fragment?

I want TextViews to display the sensors readings in a Fragment. When trying to initialize the SensorManager the ... stub } }; } See Question&Answers more detail:os...

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java - Inherited abstract class with JPA (+Hibernate)

How would you configure annotations in the following example code? I'd like to stick with JPA annotations only and ... RefData". Will this work? See Question&Answers more detail:os...

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mysql - Delete from one table with join

I'm trying to delete records from one database based on a selection criteria of another. We have two tables, ... update in the FROM Clause. See Question&Answers more detail:os...

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java - Is there a way to check if two Collections contain the same elements, independent of order?

I've been looking for a method that operates like Arrays.equals(a1, a2), but ignoring the element ... standard Collections libraries have it. See Question&Answers more detail:os...

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oracle - PLS-00103: Encountered the symbol "CREATE"

What is the problem with this package as it is giving an error? CREATE OR REPLACE PACKAGE PKG_SHOW_CUST_DETAILS AS ... . What am I missing? See Question&Answers more detail:os...

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Do Python regular expressions have an equivalent to Ruby's atomic grouping?

Ruby's regular expressions have a feature called atomic grouping (?>regexp), described here, is there any equivalent in Python's re module? See Question&Answers more detail:os...

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How to decode JSON in Flutter?

How to decode JSON in Flutter? The question is simple, but the answer isn't, at least for me. I have a ... decode JSON in Flutter from now on? See Question&Answers more detail:os...

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c# - What is the difference between a Session and a Cookie?

What is the difference between a Session and a Cookie? What circumstances should each be used? See Question&Answers more detail:os...

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How to use regex with optional characters in python?

Say I have a string "3434.35353" and another string "3593" How do I make a single regular expression that is able ... : "3434.35353" or "3593" See Question&Answers more detail:os...

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iphone - How to properly format currency on ios

I'm looking for a way to format a string into currency without using the TextField hack. For example, i'd like to have ... "52" -> "0.52" 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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