Count number of weekdays between two dates

Depending on where you live, different rules are used to determine the number of the week and a weekday. You have no chance whatsoever to get this...

Grep prints one line per match. To return the number if matches, use the -c switch:

grep -c "something" filename

However, if a word appears more than once in a line, it is only counted once.

To count every match, you can use [sed](http:...

Sometimes you want to know exactly how many objects exist within your running Ruby process. Here is how:

stats = {}
ObjectSpace.each_object  {|o| stats[o.class].nil? ? stats[o.class] = 0 : stats[o.class] += 1 }; stats

=> {String=...

Enumerable#count can do three things.

• With no argument provided, it returns the number of items.
• With an argument, it returns the number of items matching the given value.
• With a block, ...

git shortlog -s -n [commit-range]

-n, --numbered
Sort output according to the number of commits per author

-s, --summary
Suppress commit descriptions, only provide commit count

[commit-range]
E.g. $tagname.. for "everything afte...

When you use will_paginage to paginate a scope, and you want to obtain the total number of records matched before pagination, you can use total_entries:

users = User.active.paginate
puts users....

tl;dr

Since Rails 6+ you can use before? and after? to check if a date/time is before or after another date/time.

Example

christmas = Date.parse('24.12.2022')
date_of_buying_a_gift = Date.parse('12.12.2022')

date_of_b...

When two elements with display: inline-block are sitting next to each other, whitespace between becomes a space character.

Solutions, in decreasing order of awesomeness:

1. Don't have whitespace between two elements! See [Whitespace Removal in...

The following counts all the lines in all *.rb files in the app directory. Run several of these commands to get a rough estimate of the LOC.

find app -name *.rb -exec wc {} \; | awk '{a+=$1;print a}' | tail -1