Windows 8 and 2012 dark configuration

Here is how you can configure Windows 8/2012 to use a dark task bar with white letters:

1. Install uxstyle
2. Download Windows 8.1 Update1 RTM Dark Aero archive (memext mirror link)
3. Decompress to C:\Windows\Resources\Themes
4. delete the archive
5. Right click Desktop → Personalize
   1.  Select Aero Dark MK IV Theme
   2. Click Color
      1. Click “show color mixer”
      2. Configure color as desired
6. Optionally install classicshell

 

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Laravel – Hash of my password

To calculate the hash of a password perform the following steps:

1. Open terminal
2. Navigate to the Laravel installation (your project’s root directory)
3. type:

php artisan tinker

Then …

Find if integer x is prime

@see primality test

Level 1:

Check if all integers between 2 and x – 1 give non-zero remainder when divided into x.

Level 2:

Check if all integers between 2 and x/2 give non-zero remainder when divided into x.

Import and export SQL tables

You should not use phpmyadmin to export big tables from mysql. You may get partial exports because of php server timeouts.

Best way is to connect via SSH to the server and use mysqldump to export the dataset. Then you can download it and transfer it to the new server. There you could use the mysql command to import the dataset.

How to migrate wordpress

Export the WordPress database.

Export your WordPress installation’s database.

1. Create an SSH account if needed
2. Connect to the server via SSH
3. Export the wordpress database to an SQL file using mysqldump

4. Download the SQL file to the local computer using the server’s file manager, sftp etc.

Plank variations

ref

Modulo of a negative number

-b mod N = b(N-1) mod N

Common incorrect implementation:

(−b) mod k = k − (b mod k).

References:

• https://math.stackexchange.com/questions/519845/modulo-of-a-negative-number

Floating-point tolerance tests

Absolute tolerance:

• Not good for big numbers

abs(x–y) <= tol1

Relative tolerance:

• Not good for small numbers

abs(x–y) <= tol2 * max(abs(x), abs(y))

Combined tolerance test:

(abs(x-y) <= tol1) ||
  (abs(x-y) <= tol2 * max(abs(x), abs(y))

equal to:

abs(x-y) <= tol1 * Max(1.0f, tol2/tol1 * max(abs(x), abs(y))

which for tol1=tol2 becomes:

abs(x-y) <= tol1 * Max(1.0f, abs(x), abs(y))

 

References:

• Real time collision detection, Christer Ericson

 

Quotes

Austin’s Techdirt Comments (ref):

Rather than focusing on imbuing students with logic and reasoning in this country and letting natural curiosity take over, we throw volumes and volumes of raw information at students and pray that 70% sticks. I mean, Christ, we teach by shotgun, basically.

Daily Calorie Requirements for Cats

 

body weight in pounds	growing kitten	normal, neutered adult	intact adult	obese prone	weight loss
4	275	132	154	110
5	325	156	182	130
6	373	179	209	149
7	418	200	234	167
8	460	221	258	184
9	503	241	281	201
10	545	262	305	218	174
11		281	328	234	187
12		300	350	250	200
13		318	371	265	212
14		336	392	280	224
15		354	413	295	236
16		372	434	310	248
17		389	454	324	259
18		407	475	339	271
19		424	494	353	282
20		439	512	366	293

PDF link: CalorieRequirementsForCats