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Count all http response status codes in a web application log files on linux
Here is one way to count all the HTTP response status codes in a web application log file on Linux:
- Open the log file using the
cat
command:
cat log_file
- Use the
grep
command to search for lines that contain an HTTP status code:
cat log_file | grep -Eo 'HTTP/[0-9\.]+ [0-9]+'
This will output all the lines in the log file that contain an HTTP status code.
- Use the
awk
command to extract the status code from each line:
cat log_file | grep -Eo 'HTTP/[0-9\.]+ [0-9]+' | awk '{print $2}'
This will output a list of all the status codes in the log file.
- Use the
sort
anduniq
commands to count the number of occurrences of each status code:
cat log_file | grep -Eo 'HTTP/[0-9\.]+ [0-9]+' | awk '{print $2}' | sort | uniq -c
1- Sample Log file:
Given the log file below, we want to know all http response status code and sort them from the highest amount of response code to the lowest.
2- Use this command below to Count all http response status codes in a web application log files on linux:
awk '{print $9}' sample_log.log | sort | uniq -c | sort -rn
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3- Output

Script with hash tables on windows and Linux


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How to declare and write a script with hash tables on windows and linux
A hash table, also known as a hash map, is a data structure that is used to store key-value pairs. It is an efficient way to store data that can be quickly retrieved using a unique key.
Here is an example of how to declare and write a script with a hash table in Python:
# Declare an empty hash tablehash_table = {}
# Add some key-value pairs to the hash table
hash_table[‘key1’] = ‘value1’
hash_table[‘key2’] = ‘value2’
hash_table[‘key3’] = ‘value3’
# Access a value using its key
print(hash_table[‘key2’]) # Output: “value2”
# Modify a value using its key
hash_table[‘key2’] = ‘new value’
print(hash_table[‘key2’]) # Output: “new value”
# Delete a key-value pair using the `del` statement
del hash_table[‘key1’]
# Check if a key is in the hash table using the `in` operator
print(‘key1’ in hash_table) # Output: False
# Output: False
In this example, we declare an empty hash table using the {}
syntax. We then add some key-value pairs to the hash table using the []
syntax. We access a value using its key, modify a value using its key, delete a key-value pair using the del
statement, and check if a key is in the hash table using the in
operator.
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I hope this helps! Let me know if you have any questions.
Hash tables with powershell on windows
Declaration:
$states=@{“Alberta” = “Calgary”; “British Columbia” = “Vancouver”; “Ontario” = “Toronto” ; “Quebec” = “Montreal”}Name
_____Value
_______Alberta Calgary British Columbia Vancouver Ontario Toronto Quebec Montreal Add new key-value in hashtable:
$states.Add(“Manitoba”,”Winnipeg”)Remove key-value in hashtable:
$states.Remove(“Manitoba”,”Winnipeg”)
Change value in hashtable:
$states.Set_Item(“Ontario”,”Ottawa”)
Retrieve value in hashtable:
$states.Get_Item(“Alberta”)
Find key in hashtable:
$states.ContainsKey(“Alberta”)
Find Value in hashtable:
$states.ContainsValue(“Calgary”)
Count items in hashtable:
$states.Count
Sort items by Name in hashtable:
$states.GetEnumerator() | Sort-Object Name -descending
Sort items by Value in hashtable:
$states.GetEnumerator() | Sort-Object Value -descendingHash tables with perl on linux or windows
Declaration:
my %hash = (); #Initialize a hash
my $hash_ref = {}; # Initialize a hash reference. ref will return HASH
Clear (or empty) a hash
for (keys %hash)
{
delete $hash{$_};
}
Clear (or empty) a hash reference
for (keys %$href)
{
delete $href->{$_};
}
Add a key/value pair to a hash
$hash{ ‘key’ } = ‘value’; # hash
$hash{ $key } = $value; # hash, using variables
Using Hash Reference
$href->{ ‘key’ } = ‘value’; # hash ref
$href->{ $key } = $value; # hash ref, using variables
Add several key/value pairs to a hash
%hash = ( ‘key1’, ‘value1’, ‘key2’, ‘value2’, ‘key3’, ‘value3’ );
%hash = (
key1 => ‘value1’,
key2 => ‘value2’,
key3 => ‘value3’,
);Copy a hash
my %hash_copy = %hash; # copy a hash
my $href_copy = $href; # copy a hash ref
Delete a single key/value pair
delete $hash{$key};
delete $hash_ref->{$key};
Hash tables with python on linux or windows
Hash tables are called dictionary in python.
Declaration:
dict = {‘Name’: ‘Zara’, ‘Age’: 7, ‘Class’: ‘First’}
Accessing Values
print “dict[‘Name’]: “, dict[‘Name’]
print “dict[‘Age’]: “, dict[‘Age’]
Output:
dict[‘Name’]: Zara
dict[‘Age’]: 7
Updating Dictionary
dict = {‘Name’: ‘Zara’, ‘Age’: 7, ‘Class’: ‘First’}
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dict[‘Age’] = 8; # update existing entry
dict[‘School’] = “DPS School”; # Add new entry
Delete Dictionary Elements
#!/usr/bin/python
dict = {‘Name’: ‘Zara’, ‘Age’: 7, ‘Class’: ‘First’}
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del dict[‘Name’]; # remove entry with key ‘Name’
dict.clear(); # remove all entries in dict
del dict ; # delete entire dictionary
Source:
How to pipe grep on command line on windows and Linux


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How to pipe grep on command line on Windows and Linux?
Let’s find how to pipe grep or find a specific string after running a command using shell, batch and powershell (windows and Linux)
On Linux via shell
ls -al | grep filename
On Windows via powershell
GetChildItem | Select-Object “filename”
or
GetChildItem | where-Object {$_ -match “filename”}On Windows via batch
Dir | findstr “filename”
On both Windows and Linux, you can use the grep
command in combination with the |
(pipe) operator to filter the output of another command. The |
operator takes the output of the command on the left and passes it as input to the command on the right.
Here is an example of how to use the grep
command with the |
operator on both Windows and Linux:
On Linux:
# List all the files in the current directory and filter the output to show only the files that contain the word "example"
ls | grep example
On Windows:
# List all the files in the current directory and filter the output to show only the files that contain the word "example"
dir | findstr example
In this example, the ls
(Linux) or dir
(Windows) command lists all the files in the current directory, and the grep
(Linux) or findstr
(Windows) command filters the output to show only the lines that contain the word “example”.
You can use the grep
command with the |
operator in combination with other command-line utilities to perform various tasks. For example, you can use the grep
command to filter the output of the ps
command to show only the processes that contain a particular string in their command line arguments.
# Show all the processes that contain the string "python" in their command line arguments
ps -aux | grep python
I hope this helps! Let me know if you have any questions.
reverse a string on Linux and Windows


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How to reverse a string on Linux and Windows
On Linux:
- Using the
rev
command: Therev
command is a utility that reverses the lines of a file or the characters in a string. To reverse a string, you can use theecho
command to pass the string torev
:
echo "string" | rev
- Using the
sed
command: Thesed
command is a powerful utility that can perform various text transformations. To reverse a string, you can use thesed
command with the-r
option and the's/.*(.)/\1/g'
expression:
echo "string" | sed -r 's/.*(.)/\1/g'
- Using the
awk
command: Theawk
command is a programming language that is used for text processing. To reverse a string, you can use theawk
command with the{print}
action:
echo "string" | awk '{print $1}'
On Windows:
- Using the
powershell
command: Thepowershell
command is a shell that provides a command-line interface for Windows. To reverse a string, you can use thepowershell
command with the-C
option and the'[System.Text.Encoding]::Unicode.GetString([System.Text.Encoding]::Unicode.GetBytes("string"))'
expression:
powershell -C "[System.Text.Encoding]::Unicode.GetString([System.Text.Encoding]::Unicode.GetBytes("string"))"
- Using the
cmd
command: Thecmd
command is the command-line interpreter for Windows. To reverse a string, you can use thecmd
command with thefor
loop:
cmd /c "for /L %i in (1,1,%len%) do @echo !string:~%len%-%i,1!"
These are some ways to reverse a string on Linux and Windows. There are other ways to achieve this, using different utilities or programming languages.
Via shell script on Linux
sh-3.2# vi reverse.sh
#### Start Script #####
#!/bin/bash
input_string=”$1″
reverse_string=””
input_string_length=${#input_string}
for (( i=$input_string_length-1; i>=0; i– ))
do
reverse_string=”$reverse_string${input_string:$i:1}”
done
echo “$reverse_string”
##### End Script #####
Let’s run it:
sh-3.2# chmod 775 reverse.sh
sh-3.2# ./reverse.sh Etienne
enneitE
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Via powershell script on Windows
#Let’s use the script reverse.ps1 below.
######
$string=”Etienne”
$string_array=$string -split “”
[array]::Reverse($string_array)
$string_array -join ”
#####Output#####
PS C:\Users\etienne_noumen\Documents\Etienne\Scripting> .\reverse.ps1
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E t i e n n e
enneitE
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Via powershell script on Windows in one line
([regex]::Matches($String,’.’,’RightToLeft’) | ForEach {$_.value}) -join ”
Via batch script on Windows
::Note: ReverseStr also calls StrLen
::and string length is not greater than 80 chars
:: but can be changed.
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@echo off
SetLocal EnableDelayedExpansion
cls
set Str=Etienne
call :StrLen %Str%
echo Length=%Len%
call :ReverseStr %Str%
echo String=%Str%
echo Reverse Str=%Reverse%
exit /b
::—————-
:: Calc Var Length
::—————-
:: %*=Str to Check
:: Returns %Len%
:: —————
:StrLen %*
set Data=%*
for /L %%a in (0,1,80) do (
set Char=!Data:~%%a,1!
if not “!Char!”==”” (
set /a Len=%%a+1
) else (exit /b)
)
exit /b
::—————
:: Reverse String
::—————
:: %* Str to Reverse
:: Returns %Reverse%
::——————
:ReverseStr %*
set Data=%*
call :StrLen %Data%
for /L %%a in (!Len!,-1,0) do (
set Char=!Data:~%%a,1!
set Reverse=!Reverse!!Char!
)
exit /b
Via perl script on Windows or Linux
Via python script on Windows or Linux
def reverse_string(a_string)
return a_string[::-1]
reverse_string(“etienne”) returns “enneite”
Source:
Remove all empty lines in a file


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How to Remove all empty lines in a file on Linux and Windows?
Remove empty lines from file.txt via Linux command line
- Option 1: sed -i ‘/^$/d’ file.txt
- Option 2: awk ‘NF > 0’ file.txt > output.txt
- Option 3: perl -i.backup -n -e “print if /\S/” file.txt
- Option 4: grep . file.txt > output.txt
Remove empty lines from file.txt using Powershell script on Windows
List only regular file names in a directory


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How to List only regular file names in a directory on Linux and Windows
Listing regular files in a directory without including . and .. files.
On Linux
Solution 1:$ ls -p | grep -v /
Solution 2: $ ls -F | grep -v ‘[/@=|]’
Solution 3: $for list in `ls` ; do ls -ld $list | grep -v ^d > /dev/null && echo $list ; done ;
Solution4:$ for list in `ls` ; do ls -ld $list | grep ^d > /dev/null || echo $list ; done ;
Solution5 (exclude sym links):$ for list in `ls` ; do ls -ld $list | grep -v ^l > /dev/null && echo $list ; done ;On Windows
Solution 1: dir /a-d /b >..\File_List.txt
prompt and read input variables from keyboard


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Let’s find how to prompt and read input variables from keyboard while executing a script using shell, perl, python, batch and powershell (windows and Linux)
On Linux via shell
read -p “Enter your name: ” name
echo “Hi, $name. Let’s be friend!”
On Windows via powershell
$name=read-host “Enter your name:”
write-host “Hi $name, Let’s be friend!”On Windows via batch
Set /p Name=”Enter your name:”
echo “Hi %name%, Let’s be friend!”On Windows or Linux via perl
print “Enter your name “;
my $name =;
chomp $name; # Get rid of newline character at the end
print “Hello $name, let’s be friend”;On Windows or Linux via python
name=input(“Enter your name: “)
print (“Hello ” + name + ” let’s be friend”)
Replace all instances of a string in a file


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How to Replace all instances of a string in a file?
- Open the file in read mode using the
open()
function. - Read the contents of the file into a string using the
read()
method. - Use the
replace()
method to replace all instances of the target string with the new string. - Open the file in write mode using the
open()
function. - Write the modified string to the file using the
write()
method. - Close the file using the
close()
method.
Here is an example code snippet:

This will replace all instances of old_string
with new_string
in the file file.txt
.
# Open the file in read mode
with open(‘file.txt’, ‘r’) as f:
# Read the contents of the file into a string
contents = f.read()
# Replace all instances of the target string
contents = contents.replace(‘old_string’, ‘new_string’)
# Open the file in write mode
with open(‘file.txt’, ‘w’) as f:
# Write the modified string to the file
f.write(contents)
# Close the file
f.close()
Shell script to replace all instances of a string in a file on Linux & Windows.
On Linux via bash script
sed “s/$stringToReplace/$replaceWith/g” $File_Name > $File_Name
On Windows using Powershell
( get-content $File_Name ) | % { $_ -replace $stringToReplace, $replaceWith } | set-content $File_Name
On Windows using Batch
set str=teh cat in teh hat
echo.%str%
set str=%str:teh=the%
echo.%str%Script Output:
teh cat in teh hat
the cat in the hatOn Windows or Linux using Perl
perl -pi.orig -e “s///g;”
On Windows or Linux using Python
Source:
Browse the internet via command line


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How to browse the internet via command line on Linux and Windows?
On Linux
lynx http://google.ca
If you don’t have lynx on your linux installation, you will have to install it. On Linux Red hat, install it like this:
yum list lynx (to check the availability of the package)
yum -y install lynx (to install the package)
you can also use: curl -0 http://yoursite/index.html to get the source code of a specific file.
On Windows
start /max http://google.ca
Will open the url using your default browser.
Check how many CPU cores on Windows and on Linux


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How to check how many CPU cores I have on Windows & Linux?
What is a core in a CPU?
In summary, a core is a small CPU or processor built into a big CPU or CPU socket. It can independently perform or process all computational tasks. From this perspective, we can consider a core to be a smaller CPU or a smaller processor within a big processor.
Today, CPUs have been two and 18 cores, each of which can work on a different task. A core can work on one task, while another core works a different task, so the more cores a CPU has, the more efficient it is.
Open a command prompt (Windows) or Terminal (Linux) and type:
- Windows: WMIC CPU Get /Format:List
- Linux: cat /proc/cpuinfo | grep processor | wc -l
For more details on Linux: ls /sys/devices/system/cpu/
What does 4 CPU cores mean?
A quad-core CPU has four processing cores in a single chip. It is similar to a dual-core CPU, but has four separate processors (rather than two), which can process instructions at the same time.
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List of Freely available programming books - What is the single most influential book every Programmers should read
- Bjarne Stroustrup - The C++ Programming Language
- Brian W. Kernighan, Rob Pike - The Practice of Programming
- Donald Knuth - The Art of Computer Programming
- Ellen Ullman - Close to the Machine
- Ellis Horowitz - Fundamentals of Computer Algorithms
- Eric Raymond - The Art of Unix Programming
- Gerald M. Weinberg - The Psychology of Computer Programming
- James Gosling - The Java Programming Language
- Joel Spolsky - The Best Software Writing I
- Keith Curtis - After the Software Wars
- Richard M. Stallman - Free Software, Free Society
- Richard P. Gabriel - Patterns of Software
- Richard P. Gabriel - Innovation Happens Elsewhere
- Code Complete (2nd edition) by Steve McConnell
- The Pragmatic Programmer
- Structure and Interpretation of Computer Programs
- The C Programming Language by Kernighan and Ritchie
- Introduction to Algorithms by Cormen, Leiserson, Rivest & Stein
- Design Patterns by the Gang of Four
- Refactoring: Improving the Design of Existing Code
- The Mythical Man Month
- The Art of Computer Programming by Donald Knuth
- Compilers: Principles, Techniques and Tools by Alfred V. Aho, Ravi Sethi and Jeffrey D. Ullman
- Gödel, Escher, Bach by Douglas Hofstadter
- Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin
- Effective C++
- More Effective C++
- CODE by Charles Petzold
- Programming Pearls by Jon Bentley
- Working Effectively with Legacy Code by Michael C. Feathers
- Peopleware by Demarco and Lister
- Coders at Work by Peter Seibel
- Surely You're Joking, Mr. Feynman!
- Effective Java 2nd edition
- Patterns of Enterprise Application Architecture by Martin Fowler
- The Little Schemer
- The Seasoned Schemer
- Why's (Poignant) Guide to Ruby
- The Inmates Are Running The Asylum: Why High Tech Products Drive Us Crazy and How to Restore the Sanity
- The Art of Unix Programming
- Test-Driven Development: By Example by Kent Beck
- Practices of an Agile Developer
- Don't Make Me Think
- Agile Software Development, Principles, Patterns, and Practices by Robert C. Martin
- Domain Driven Designs by Eric Evans
- The Design of Everyday Things by Donald Norman
- Modern C++ Design by Andrei Alexandrescu
- Best Software Writing I by Joel Spolsky
- The Practice of Programming by Kernighan and Pike
- Pragmatic Thinking and Learning: Refactor Your Wetware by Andy Hunt
- Software Estimation: Demystifying the Black Art by Steve McConnel
- The Passionate Programmer (My Job Went To India) by Chad Fowler
- Hackers: Heroes of the Computer Revolution
- Algorithms + Data Structures = Programs
- Writing Solid Code
- JavaScript - The Good Parts
- Getting Real by 37 Signals
- Foundations of Programming by Karl Seguin
- Computer Graphics: Principles and Practice in C (2nd Edition)
- Thinking in Java by Bruce Eckel
- The Elements of Computing Systems
- Refactoring to Patterns by Joshua Kerievsky
- Modern Operating Systems by Andrew S. Tanenbaum
- The Annotated Turing
- Things That Make Us Smart by Donald Norman
- The Timeless Way of Building by Christopher Alexander
- The Deadline: A Novel About Project Management by Tom DeMarco
- The C++ Programming Language (3rd edition) by Stroustrup
- Patterns of Enterprise Application Architecture
- Computer Systems - A Programmer's Perspective
- Agile Principles, Patterns, and Practices in C# by Robert C. Martin
- Growing Object-Oriented Software, Guided by Tests
- Framework Design Guidelines by Brad Abrams
- Object Thinking by Dr. David West
- Advanced Programming in the UNIX Environment by W. Richard Stevens
- Hackers and Painters: Big Ideas from the Computer Age
- The Soul of a New Machine by Tracy Kidder
- CLR via C# by Jeffrey Richter
- The Timeless Way of Building by Christopher Alexander
- Design Patterns in C# by Steve Metsker
- Alice in Wonderland by Lewis Carol
- Zen and the Art of Motorcycle Maintenance by Robert M. Pirsig
- About Face - The Essentials of Interaction Design
- Here Comes Everybody: The Power of Organizing Without Organizations by Clay Shirky
- The Tao of Programming
- Computational Beauty of Nature
- Writing Solid Code by Steve Maguire
- Philip and Alex's Guide to Web Publishing
- Object-Oriented Analysis and Design with Applications by Grady Booch
- Effective Java by Joshua Bloch
- Computability by N. J. Cutland
- Masterminds of Programming
- The Tao Te Ching
- The Productive Programmer
- The Art of Deception by Kevin Mitnick
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Top 1000 Canada Quiz and trivia: CANADA CITIZENSHIP TEST- HISTORY - GEOGRAPHY - GOVERNMENT- CULTURE - PEOPLE - LANGUAGES - TRAVEL - WILDLIFE - HOCKEY - TOURISM - SCENERIES - ARTS - DATA VISUALIZATION

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Exploring the Pros and Cons of Visiting All Provinces and Territories in Canada.

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Health Health, a science-based community to discuss human health
- New type of diabetes is now officially recognized and linked to nutritional deficienciesby /u/ScarletLetterXYZ on July 7, 2025 at 4:25 am
submitted by /u/ScarletLetterXYZ [link] [comments]
- How Pharmaceutical Tariffs Could Worsen Generic Drug Shortagesby /u/Nerd-19958 on July 7, 2025 at 4:10 am
submitted by /u/Nerd-19958 [link] [comments]
- Unvaccinated horse dies from Hendra virus as Queensland records first case in three yearsby /u/boppinmule on July 6, 2025 at 6:38 am
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- Measles cases surge to record high since disease was declared eliminated in the USby /u/DoremusJessup on July 6, 2025 at 4:18 am
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- The Reality My Medicaid Patients Faceby /u/marji80 on July 5, 2025 at 5:34 pm
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Today I Learned (TIL) You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.
- TIL that the U.S. once accidentally dropped an atomic bomb on North Carolina in 1961, and only one tiny safety switch prevented a nuclear explosion.by /u/CycleSignal_ on July 7, 2025 at 3:56 am
submitted by /u/CycleSignal_ [link] [comments]
- TIL deaf britians and deaf americans can't understand eachothers' signsby /u/AeronGrey on July 7, 2025 at 2:33 am
submitted by /u/AeronGrey [link] [comments]
- TIL Joan Crawford's last film before her death was a science fiction horror film called "Trog"by /u/ryanmer on July 6, 2025 at 11:52 pm
submitted by /u/ryanmer [link] [comments]
- TIL a stray dog followed Dion Leonard, who was running in a week-long ultramarathon in the Gobi Desert, for 77 miles of the 155-mile race. At night the dog even started to join him in his tent. He named her Gobi, & after the race, he crowdfunded the £5K needed to bring her back to Scotland with him.by /u/tyrion2024 on July 6, 2025 at 11:47 pm
submitted by /u/tyrion2024 [link] [comments]
- TIL by embracing a low-cost production model & taking less money upfront, executive producers Rob McElhenney, Glenn Howerton, & Charlie Day were given a "sizable ownership stake" in It's Always Sunny in Philadelphia. By 2011, through just 7 seasons, the trio's stake was already worth close to $60m.by /u/tyrion2024 on July 6, 2025 at 11:46 pm
submitted by /u/tyrion2024 [link] [comments]
Reddit Science This community is a place to share and discuss new scientific research. Read about the latest advances in astronomy, biology, medicine, physics, social science, and more. Find and submit new publications and popular science coverage of current research.
- Intimate partner violence overwhelmingly affects women, but men can also be victims. Yet male victims are often met with skepticism, ridicule, or disbelief. People are more likely to dismiss male victims of intimate partner violence when they also endorse sexist beliefs about men.by /u/mvea on July 6, 2025 at 11:16 pm
submitted by /u/mvea [link] [comments]
- A new study finds teens with depression had higher levels of common antibiotics in their urine, suggesting everyday exposure may raise mental health risks.by /u/calliope_kekule on July 6, 2025 at 7:42 pm
submitted by /u/calliope_kekule [link] [comments]
- Trump has not just weathered criminal charges and political scandal—he has repurposed them into proof of his own victimhood, suggests new study. In doing so, far-right figures can appear vulnerable while simultaneously reinforcing policies that harm those who are actually marginalized.by /u/mvea on July 6, 2025 at 5:53 pm
submitted by /u/mvea [link] [comments]
- Controlled trial demonstrates higher non-heme iron absorption in vegans compared to omnivores, highlighting the physiological adaptations involved in iron metabolism in plant-based diets.by /u/James_Fortis on July 6, 2025 at 12:29 pm
submitted by /u/James_Fortis [link] [comments]
- Hearing aids and cochlear implants improve social lives of adults with hearing lossby /u/Ollyfer on July 6, 2025 at 11:55 am
submitted by /u/Ollyfer [link] [comments]
Reddit Sports Sports News and Highlights from the NFL, NBA, NHL, MLB, MLS, and leagues around the world.
- Four-time PGA TOUR winner Ed Fiori passes away at the age of 72by /u/Oldtimer_2 on July 7, 2025 at 2:19 am
submitted by /u/Oldtimer_2 [link] [comments]
- Denver Nuggets want Jonas Valanciunas to honor deal amid Greece rumorsby /u/Oldtimer_2 on July 7, 2025 at 2:17 am
submitted by /u/Oldtimer_2 [link] [comments]
- Edson Álvarez's tiebreaking goal gives Mexico 2-1 win over US for 10th Gold Cup titleby /u/Oldtimer_2 on July 7, 2025 at 1:24 am
submitted by /u/Oldtimer_2 [link] [comments]
- Manager Dave Martinez and GM Mike Rizzo get fired by the last-place Washington Nationalsby /u/Oldtimer_2 on July 7, 2025 at 12:33 am
submitted by /u/Oldtimer_2 [link] [comments]
- Phillies' Zack Wheeler throws 1-hitter for his first complete game since 2021by /u/Oldtimer_2 on July 6, 2025 at 9:46 pm
submitted by /u/Oldtimer_2 [link] [comments]