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1004
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42 answers

How to validate phone numbers using regex

I'm trying to put together a comprehensive regex to validate phone numbers. Ideally it would handle international formats, but it must handle US formats, including the following: 1-234-567-8901 1-234-567-8901 x1234 1-234-567-8901 ext1234 1 (234)…
Nicholas Trandem
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20 answers

How do I remove/delete a folder that is not empty?

I am getting an 'access is denied' error when I attempt to delete a folder that is not empty. I used the following command in my attempt: os.remove("/folder_name"). What is the most effective way of removing/deleting a folder/directory that is not…
Amara
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54 answers

Find the min/max element of an array in JavaScript

How can I easily obtain the min or max element of a JavaScript array? Example pseudocode: let array = [100, 0, 50] array.min() //=> 0 array.max() //=> 100
HankH
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1003
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9 answers

How to find time complexity of an algorithm?

I have gone through Google and Stack Overflow search, but nowhere I was able to find a clear and straightforward explanation for how to calculate time complexity What do I know already? Say for a code as simple as the one below: char h = 'y'; //…
Yasser Shaikh
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1002
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33 answers

Converting from a string to boolean in Python?

Does anyone know how to do convert from a string to a boolean in Python? I found this link. But it doesn't look like a proper way to do it. I.e. using built-in functionality, etc. The reason I'm asking this is because I learned about int("string")…
Joan Venge
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1002
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1 answer

What are the new features in C++17?

C++17 is now feature complete, so unlikely to experience large changes. Hundreds of proposals were put forward for C++17. Which of those features were added to C++ in C++17? When using a C++ compiler that supports "C++1z", which of those features…
Yakk - Adam Nevraumont
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1002
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19 answers

What's the difference between a POST and a PUT HTTP REQUEST?

They both seem to be sending data to the server inside the body, so what makes them different?
fuentesjr
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27 answers

How to detect Safari, Chrome, IE, Firefox and Opera browser?

I have 5 addons/extensions for FF, Chrome, IE, Opera, and Safari. How can I recognize the user browser and redirect (once an install button has been clicked) to download the corresponding addon?
FrankC
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1001
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19 answers

Why is setTimeout(fn, 0) sometimes useful?

I've recently run into a rather nasty bug, wherein the code was loading a had a pre-selected value. In IE6, we already had code to fix the selected
Dan Lew
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1001
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39 answers

Error: Can't set headers after they are sent to the client

I'm fairly new to Node.js and I am having some issues. I am using Node.js 4.10 and Express 2.4.3. When I try to access http://127.0.0.1:8888/auth/facebook, i'll be redirected to http://127.0.0.1:8888/auth/facebook_callback. I then received the…
DjangoRocks
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1001
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14 answers

List comprehension vs. lambda + filter

I happened to find myself having a basic filtering need: I have a list and I have to filter it by an attribute of the items. My code looked like this: my_list = [x for x in my_list if x.attribute == value] But then I thought, wouldn't it be better…
Agos
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1001
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31 answers

Git push error '[remote rejected] master -> master (branch is currently checked out)'

Yesterday, I posted a question on how to clone a Git repository from one of my machines to another, How can I 'git clone' from another machine?. I am now able to successfully clone a Git repository from my source (192.168.1.2) to my destination…
hap497
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1001
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26 answers

How to download a file over HTTP?

I have a small utility that I use to download an MP3 file from a website on a schedule and then builds/updates a podcast XML file which I've added to iTunes. The text processing that creates/updates the XML file is written in Python. However, I use…
Owen
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1000
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1 answer

Escape curly brace '{' in String.Format

How do I display a literal curly brace character when using the String.Format method? Example: sb.AppendLine(String.Format("public {0} {1} { get; private set; }", prop.Type, prop.Name)); I would like the output to look like this: public Int32…
PhilB
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6 answers

Definition of "downstream" and "upstream"

I've started playing with Git and have come across the terms "upstream" and "downstream". I've seen these before but never understood them fully. What do these terms mean in the context of SCMs (Software Configuration Management tools) and source…
brendan
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