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Batch Renaming of Files in a Directory
...tion and is also used as a formatting operator. But usually it is followed by the s or f to specify the format. Why is nothing (space) immediately after % in the said command?
– Shashank Sawant
Apr 5 '14 at 22:32
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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
...s whether it is a file or directory), you will get the return value thrown by the ls command, which should be 0 (default "success" return value). If it doesn't exist, you should get a number other then 0. The exact number depends on the program.
For many programs you can find the numbers and their ...
Mercurial move changes to a new branch
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As suggested by Mark, the MqExtension is one solution for you problem. IMHO a simpler workflow is to use the rebase extension. Suppose you have a history like this:
@ changeset: 2:81b92083cb1d
| tag: tip
| summary: my ne...
Learning Ruby on Rails
... it stands now, I'm a Java and C# developer. The more and more I look at Ruby on Rails, the more I really want to learn it.
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Is it better to reuse a StringBuilder in a loop?
...ngth(0) is far and away the most efficient answer. StringBuilder is backed by a char array and is mutable. At the point .toString() is called, the char array is copied and is used to back an immutable string. At this point, the mutable buffer of StringBuilder can be re-used, simply by moving the ins...
CSS Pseudo-classes with inline styles
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Another point for inline styles is lowering render times by using a virtual DOM. A CSS will need to scan the entire document for changes and applying its styles. This is eliminated by inline styles.
– Frederik Krautwald
May 22 '15 at 22:04
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Append column to pandas dataframe
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As pointed by @jeremy-z, it is very important to reset indexes in both dataset if they don't share same index. Otherwise you will get one dataset with lot of NaNs rows.
– Israel Varea
Jun 18 '19 at...
How long does it take for GitHub page to show changes after changing index.html
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Github pages are cached with CDN. As explained by JoelGlovier in comments, you can still have the latest version of your pages by appending a version in the query string such as https://username.github.io/awesome-repo/?version=f36af92 so that you won't get a cached versio...
Convert String to SecureString
...il garbage collection). However, you can add characters to a SecureString by appending them.
var s = new SecureString();
s.AppendChar('d');
s.AppendChar('u');
s.AppendChar('m');
s.AppendChar('b');
s.AppendChar('p');
s.AppendChar('a');
s.AppendChar('s');
s.AppendChar('s');
s.AppendChar('w');
s.Appe...
Connect to a heroku database with pgadmin
I would like to manage my heroku database with pgadmin client. By now, I've been doing this with psql .
When I use data from heroku pg:credentials to connect de DB using pgadmin , I obtain:
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