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How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
... new file called /etc/apt/sources.list.d/pgdg.list and add below line
deb http://apt.postgresql.org/pub/repos/apt/ utopic-pgdg main
Follow below commands
wget -q -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get update
sudo apt-get install postgresql-9.4
s...
Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the La
... and very maintainable implementation:
/**
*
* Base64 encode / decode
* http://www.webtoolkit.info
*
**/
var Base64 = {
// private property
_keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
// public method for encoding
, encode: function (input)
{...
How to tell if rails is in production?
...gt; Booting Puma
=> Rails 4.2.4 application starting in `production` on http://localhost:3000
Had Webrick in the example but some people didn't understand how changing servers would just substitute the name. Updated for clarity.
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Java - Convert integer to string [duplicate]
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String.valueOf(number) (my preference)
"" + number (I don't know how the compiler handles it, perhaps it is as efficient as the above)
Integer.toString(number)
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Is there a reason for C#'s reuse of the variable in a foreach?
...
The compiler declares the variable in a way that makes it highly prone to an error that is often difficult to find and debug, while producing no perceivable benefits.
Your criticism is entirely justified.
I discuss this proble...
How to fully remove Xcode 4
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brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
What's wrong with overridable method calls in constructors?
...y between the constructor and the method.
Have a look on this sample link http://www.javapractices.com/topic/TopicAction.do?Id=215
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Django: reverse accessors for foreign keys clashing
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How to remove the arrow from a select element in Firefox
...d on Windows 8, Ubuntu and Mac, latest versions of Firefox.
Live example: http://jsfiddle.net/joaocunha/RUEbp/1/
More on the subject: https://gist.github.com/joaocunha/6273016
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How to automatically generate N “distinct” colors?
...es (some colors in the articles are not specified in RGB, for instance):
http://chem8.org/uch/space-55036-do-blog-id-5333.html
https://metacpan.org/pod/Color::Library::Dictionary::NBS_ISCC
Color Theory: How to convert Munsell HVC to RGB/HSB/HSL
For Kelly's and Boynton's list, I've already made t...