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syntax on

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Install Postgres 14

First, make sure you have homebrew installed.

Then, in your terminal, run brew install [email protected]

Login into psql postgres

start/stop postgres

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Install Python 2.7 on Mac OS

You will need to have Python 2.7 (and not v3 to avoid incompatibilities with some libraries). To check what’s your default Python version, type python -V in your terminal.

brew install pyenv
pyenv install 2.7.18
pyenv global 2.7.18 # set Python 2.7 as the global default one

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git tag --sort=-creatordate | head -n3 

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library VS require in R

When loading a library, always use library. Never use require

TL;DR: require breaks one of the fundamental rules of robust software systems, fail early. In a nutshell, this is because, when using require, your code might yield different, erroneous results, without signalling an error. This is rare but not hypothetical! Consider this code, which yields different results depending on whether {dplyr} can be loaded:

On the other hand, require does install the package if hasn’t been installed (whereas library doesn’t).

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 echo "\n# Allow unmatched wildcard expressions in zsh\nsetopt NO_NOMATCH" >> ~/.zshrc

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How to install Ruby & Rails on macOS?

Here are the simple 4 steps to install Ruby 3 and Rails v7 on macOS

Step 1: Install Homebrew

First, open your Terminal and run the following steps (I personally use iTerm2).

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

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# To add in your ~/.zshrc or ~/.bashrc file
export VOLTA_HOME="$HOME/.volta"
export PATH="$VOLTA_HOME/bin:$PATH"

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# create a data frame
user_df <- data.frame(
    name = c("Alice", "Bob", "Charlie", "Dave"),
    age = c(25, 32, 47, 19),
    city = c("New York", "San Francisco", "Los Angeles", "Chicago"),
    stringsAsFactors = FALSE
)

# view the data frame
user_df

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How to quickly setup a LAMP on MacOS

Install PHP 7.3 and MySQL 5.1+

First, let’s install the Mac dependency manager “Homebrew”

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"