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Cannot install packages using node package manager in Ubuntu
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TL;DR:
sudo apt-get install nodejs-legacy
First of all let me clarify the situation a bit. In summer 2012 Debian maintainers decided to rename Node.js executable to prevent some kind of namespace collision with another package. It was very hard ...
How to convert JSON to CSV format and store in a variable
... Worth noting that this escapes strings in quotes using \" which allows some fields to "pop out" of their column when viewed in Excel (which seems to prefer "" as an escape character for quotes). This can be solved by adding .replace(/\\"/g, '""') to the end of JSON.stringify(row[fieldName...
How to install a gem or update RubyGems if it fails with a permissions error
I'm trying to install a gem using gem install mygem or update RubyGems using gem update --system , and it fails with this error:
...
Rendering JSON in controller
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You'll normally be returning JSON either because:
A) You are building part / all of your application as a Single Page Application (SPA) and you need your client-side JavaScript to be able to pull in additional data without fully reload...
How do I read an attribute on a class at runtime?
...d be further generalized by extending MemberInfo, a base class of Type and all - or at least most - of a Type's members. Doing so would open this up to allow reading attributes from Properties, Fields, and even Events.
– M.Babcock
Aug 12 '14 at 1:54
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What is the equivalent of Java's final in C#?
...le difference between the two languages here is that Java by default marks all non-static methods as virtual, whereas C# marks them as sealed. Hence, you only need to use the sealed keyword in C# if you want to stop further overriding of a method that has been explicitly marked virtual in the base c...
Disabling browser print options (headers, footers, margins) from page?
...t consistent. Safari still does not support setting printer page margin at all, but all the other major browsers now support it.
With the @page directive, you can specify printer margin of the page (which is not the same as normal CSS margin of an HTML element):
<html xmlns="http://www.w3.org/199...
Android notification is not showing
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The code won't work without an icon. So, add the setSmallIcon call to the builder chain like this for it to work:
.setSmallIcon(R.drawable.icon)
Android Oreo (8.0) and above
Android 8 introduced a new requirement of setting the channelId property by using a NotificationChannel...
Detect permission of camera in iOS
...se if(authStatus == AVAuthorizationStatusRestricted){
// restricted, normally won't happen
} else if(authStatus == AVAuthorizationStatusNotDetermined){
// not determined?!
[AVCaptureDevice requestAccessForMediaType:mediaType completionHandler:^(BOOL granted) {
if(granted){
NSLog(@"Gr...
How do I check if a given string is a legal/valid file name under Windows?
...than ASCII space)
Any other character that the target file system does not allow (say, trailing periods or spaces)
Any of the DOS names: CON, PRN, AUX, NUL, COM0, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT0, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9 (and avoid AUX.txt, etc)...