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Building vs. Compiling (Java)
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The "Build" is a process that covers all the steps required to create a "deliverable" of your software. In the Java world, this typically includes:
Generating sources (sometimes).
Compiling sources.
Compiling test sources.
Executing tests (unit tests, integrat...
Best practices for SQL varchar column length [closed]
...ax length that is not a power of 2.
I think early SQL Server versions actually treated a VARCHAR with length 255 differently than one with a higher maximum length. I don't know if this is still the case.
For almost all DBMS, the actual storage that is required is only determined by the number of ...
How do you diff a directory for only files of a specific type?
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So it looks like -x only accepts one pattern as you report but if you put all the patterns you want to exclude in a file (presumably one per line) you could use the second flag like so:
$ diff /destination/dir/1 /destination/dir/2 -r -X exclude.pats
where exclude.pats is:
*.jpg
*.JPG
*.xml
*.XM...
Automatic TOC in github-flavoured-markdown
...lavored-markdown:
DocToc Command Line Tool (source) requires node.js
Installation:
npm install doctoc
Usage:
npx doctoc . to add table of contents to all markdown files in the current and all sub directories.
DocToc WebApp
If you want to try it online first, go to the doctoc site,
paste t...
Sticky and NON-Sticky sessions
..., a session object is created and remains in the memory of the web server. All the requests from the client go to this web server and update this session object. If some data needs to be stored in the session object over the period of interaction, it is stored in this session object and stays there ...
What is an example of the Liskov Substitution Principle?
...the abstraction of having Square inherit from Rectangle is a bad one.
Y'all should check out the other priceless SOLID Principles Motivational Posters.
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What's the difference between jquery.js and jquery.min.js?
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They are both the same functionally but the .min one has all unnecessary characters removed in order to make the file size smaller.
Just to point out as well, you are better using the minified version (.min) for your live environment as Google are now che...
Algorithm to return all combinations of k elements from n
... set it's best to use a modified gray code algorithm so you aren't holding all of them in memory. These generate the next combination from the previous and avoid repetitions. There are many of these for different uses. Do we want to maximize the differences between successive combinations? minimize?...
SQLAlchemy: What's the difference between flush() and commit()?
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A Session object is basically an ongoing transaction of changes to a database (update, insert, delete). These operations aren't persisted to the database until they are committed (if your program aborts for some reason in mid-session transaction, any...
Do rails rake tasks provide access to ActiveRecord models?
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namespace :test do
task :new_task => :environment do
puts Parent.all.inspect
end
end
Notice the => :environment dependency added to the task
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