How to append authorized_keys on the remote server with id_rsa.pub key
ssh-copy-id user@remote_server http://linux.die.net/man/1/ssh-copy-id
‘for’ loop vs Qt’s ‘foreach’ in C++
It really doesn’t matter in most cases. The large number of questions on StackOverflow regarding whether this method or that method is faster, belie the fact that, in the vast majority of cases, code spends most of its time sitting around waiting for users to do something. If you are really concerned, profile it for …
Skip first line(field) in loop using CSV file? [duplicate]
There are many ways to skip the first line. In addition to those said by Bakuriu, I would add: with open(filename, ‘r’) as f: next(f) for line in f: and: with open(filename,’r’) as f: lines = f.readlines()[1:]
ActiveRecord serialize using JSON instead of YAML
In Rails 3.1 you can just class Form < ActiveRecord::Base serialize :column, JSON end
Cannot resolve method ‘getSupportFragmentManager ( )’ inside Fragment
Inside a Fragment subclass you have to use getFragmentManager in place of getSupportFragmentManager. You will get the support one if the import are from the support library.
How do I determine the width and height of an image in Flutter?
The other answers seem overly complicated if you just want the width and height of an image in an async function. You can get the image resolution using flutter lib directly like this: import ‘dart:io’; File image = new File(‘image.png’); // Or any other way to get a File instance. var decodedImage = await decodeImageFromList(image.readAsBytesSync()); …
Taking over a project – What should I ask the previous programmer? [closed]
Before you look at the code: Clear the objs and the exes, and let him/her rebuild the thing. Watch for any manual interaction (does it build via “make” alone or is there some fiddling involved). Better yet: give him/her a naked (just bought) machine, let him/her demonstrate a checkout and rebuild. Then see how the …
Setting BOLD font on iOS UILabel
It’s a fishy business to mess with the font names. And supposedly you have an italic font and you wanna make it bold – adding simply @”-Bold” to the name doesn’t work. There’s much more elegant way: – (UIFont *)boldFontWithFont:(UIFont *)font { UIFontDescriptor * fontD = [font.fontDescriptor fontDescriptorWithSymbolicTraits:UIFontDescriptorTraitBold]; return [UIFont fontWithDescriptor:fontD size:0]; } size:0 means …
Why is a = (a+b) – (b=a) a bad choice for swapping two integers?
No. This is not acceptable. This code invokes Undefined behavior. This is because of the operation on b is not defined. In the expression a=(a+b)-(b=a); it is not certain whether b gets modified first or its value gets used in the expression (a+b) because of the lack of the sequence point. See what standard syas: …
How to add custom font in react native android
UPDATE Many answers are here for adding custom font in react-native for version < 0.60. For those who are using react-native version > 0.60 , ‘rnpm’ is deprecated and custom fonts will not work. Now, in order to add custom font in react-native version > 0.60 you will have to : 1- Create a file …