Recent questions

0 votes

795 views

1 answer

types - Which is the first integer that an IEEE 754 float is incapable of representing exactly?

For clarity, if I'm using a language that implements IEE 754 floats and I declare: float f0 = 0.f; float f1 = ... (MSVC++, Win64), and it seemed fine, though. Question&Answers:os...

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

0 votes

523 views

1 answer

java - Regex for splitting a string using space when not surrounded by single or double quotes

I'm new to regular expressions and would appreciate your help. I'm trying to put together an expression ... expression' retain the space between the words. Question&Answers:os...

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

0 votes

256 views

1 answer

mysql - Using backticks around field names

After reading a couple of answers and comments on some SQL questions here, and also hearing that a friend of mine ... vs -- SELECT id, name, anotherfield ... Question&Answers:os...

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

0 votes

172 views

1 answer

date - How do I calculate someone's age in Java?

I want to return an age in years as an int in a Java method. What I have now is the following where getBirthDate( ... since I have no unit tests in place (yet). Question&Answers:os...

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

0 votes

190 views

1 answer

Regex to pick characters outside of pair of quotes

I would like to find a regex that will pick out all commas that fall outside quote sets. For example: 'foo' = ... with readaheads, but my regex fu is too weak. Question&Answers:os...

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

0 votes

136 views

1 answer

How can server push asynchronous changes to a HTML page created by JSF?

When we create a JSF page, a client request allows generation of HTML dynamically using a combination of Java ... at the server, usually via different threads? Question&Answers:os...

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

0 votes

894 views

1 answer

mongoose - Does MongoDB's $in clause guarantee order

When using MongoDB's $in clause, does the order of the returned documents always correspond to the order of the array argument? Question&Answers:os...

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

0 votes

599 views

1 answer

vi - How do I exit the Vim editor?

I'm stuck and cannot escape. It says: "type :quit<Enter> to quit VIM" But when I type that it simply appears in the object body. Question&Answers:os...

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

0 votes

145 views

1 answer

What are the differences between Abstract Factory and Factory design patterns?

I know there are many posts out there about the differences between these two patterns, but there are a ... the last question, would be greatly appreciated. Question&Answers:os...

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

0 votes

750 views

1 answer

build.gradle - What's the difference between implementation, api and compile in Gradle?

After updating to Android Studio 3.0 and creating a new project, I noticed that in build.gradle there is a ... between them and what should I be using? Question&Answers:os...

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

0 votes

122 views

1 answer

c# - Virtual member call in a constructor

I'm getting a warning from ReSharper about a call to a virtual member from my objects constructor. Why would this be something not to do? Question&Answers:os...

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

0 votes

362 views

1 answer

arrays - Converting 'ArrayList<String> to 'String[]' in Java

How might I convert an ArrayList<String> object to a String[] array in Java? Question&Answers:os...

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

0 votes

115 views

1 answer

android - How to draw a path on a map using kml file?

Can I parse kml file in order to display paths or points in Android? Please could you help me with that? This is ... tell me what's I'm doing wrong here? Question&Answers:os...

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

0 votes

197 views

1 answer

Are arrays passed by value or passed by reference in Java?

This question already has answers here: Question&Answers:os...

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

0 votes

243 views

1 answer

c# - Any difference between "await Task.Run(); return;" and "return Task.Run()"?

Is there any conceptual difference between the following two pieces of code: async Task TestAsync() { await Task. ... even where there is no asynchrony. Why? Question&Answers:os...

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

0 votes

111 views

1 answer

c++ - Why is my power operator (^) not working?

#include <stdio.h> void main(void) { int a; int result; int sum = 0; printf("Enter a number: "); scanf("%d" ... ); } Why is ^ not working as the power operator? Question&Answers:os...

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

0 votes

224 views

1 answer

mysql - need to return two sets of data with two different where clauses

I have a table that keeps track of transactions. The table is setup as: transactions: id, account_id, budget_id, ... 200000 100 242 100000 5020 621 45000 3940 Question&Answers:os...

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

0 votes

144 views

1 answer

C function called from Python via ctypes returns incorrect value

I have written a simple function in C that raises a given number to a given power. The function returns ... error that is causing the function to miscalculate? Question&Answers:os...

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

0 votes

201 views

1 answer

Closed. This question is opinion-based. It is not currently accepting answers. Question&Answers:os...

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

0 votes

881 views

1 answer

Is there a way for non-root processes to bind to "privileged" ports on Linux?

It's very annoying to have this limitation on my development box, when there won't ever be any users other than ... cases, you can use capabilities to do this. Question&Answers:os...

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

0 votes

353 views

1 answer

Where are static variables stored in C and C++?

In what segment (.BSS, .DATA, other) of an executable file are static variables stored so that they don't ... purposes, lets assume we use the GCC toolchain. Question&Answers:os...

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

0 votes

303 views

1 answer

What is an alternative to execfile in Python 3?

It seems they canceled in Python 3 all the easy way to quickly load a script by removing execfile() Is there an obvious alternative I'm missing? Question&Answers:os...

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

0 votes

71 views

1 answer

How to start a background process in Python?

I'm trying to port a shell script to the much more readable python version. The original shell script starts several ... I couldn't find how to do this easily. Question&Answers:os...

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

0 votes

50 views

1 answer

How to convert an array to object in PHP?

How can I convert an array like this to an object? [128] => Array ( [status] => "Figure A. Facebook's ... other day at work, I had some spare time" ) Question&Answers:os...

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

0 votes

165 views

1 answer

Locking a file in Python

I need to lock a file for writing in Python. It will be accessed from multiple Python processes at once. I ... they are often only Unix based or Windows based. Question&Answers:os...

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

0 votes

137 views

1 answer

python - How to debug a Flask app

How are you meant to debug errors in Flask? Print to the console? Flash messages to the page? Or is ... figure out what's happening when something goes wrong? Question&Answers:os...

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

0 votes

395 views

1 answer

mongodb - Hoe yo update objects in a document's array (nested updating)

Assume we have the following collection, which I have few questions about: { "_id" : ObjectId("4faaba123412d654fe83hg876" ... update the "total" field as well. Question&Answers:os...

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

0 votes

88 views

1 answer

python - How do you create different variable names while in a loop?

This question already has answers here: Question&Answers:os...

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

Categories

Just Browsing Browsing

Most popular tags