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Say Goodbye to Loops in Python, and Welcome Vectorization!

Use Vectorization — a super fast alternative to loops in Python

By Anmol Tomar on CodeX

Nov 29, 2022

Introduction

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jq Notebook

Useful notes about using jq.

1. Print all paths to values
   • jq -c paths Prints each path as an array and doesn't show values.
   • jq --stream 'select(.[1]|scalars!=null) | "\(.[0]|join(".")): \(.[1]|tojson)"' example.json
     Nearly perfect. If each path shown began with . and array indices were enclosed in square brackets, then each one would be a valid jq query string.

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yq Notebook

Useful notes about using yq

1. Display the path to each value in a YAML file

   $ cat << EOF | yq e '.. | select(. == "*") | {(path | join(".")): .} ' -
   > a:
   >   b: foo

> c: bar

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#!/bin/sh --

# Set timestamps of files in a cloned git repository to when they were last committed.

# Default: All git-controlled files in current directory, recursively 
if [ ${#} = 0 ]; then
  files="$(git ls-files -z | xargs -0 echo)"
else
  files="${@}"
fi

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import boto3
import os
from contextlib import closing
from botocore.exceptions import ClientError


def object_exists(s3, bucket, key):
    try:
        boto3.resource('s3').Object(bucket, key).load()
        return True

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#!/bin/sh --

# Toggle macOS Background Sounds on or off.
#
# See the System Settings panel for Accessibility > Audio to change settings
# like the sound played, volume level, and automatic stop.

# `read` returns an integer, but…
if [ $(defaults read com.apple.ComfortSounds 'comfortSoundsEnabled') = 0 ]
then

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#!/bin/sh
awk 'function wl() {
        rate=64000;
        return (rate/160)*(0.87055^(int(rand()*10)))};
    BEGIN {
        srand();
        wla=wl();
        while(1) {
            wlb=wla;
            wla=wl();

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def recursiveFormat(args, **kwargs):
    """
    Recursively apply `string.format()` to all strings in a data structure.

    This is intended to be used on a data structure that may contain
    format strings just before it is passed to `json.dump()` or `dumps()`.
    
    Ideally, I'd like to build this into a subclass of `json.JsonEncoder`,
    but it's tricky to separate out string handling in that class.  I'll
    continue to think about it.

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#!/bin/sh --

# Get the local ngrok public URL, which includes the hostname, extracted using jq
# Inspiration: https://gist.github.com/rjz/af40158c529d7c407420fc0de490758b#gistcomment-2594627

curl --silent http://127.0.0.1:4040/api/tunnels | jq -r '.tunnels[0].public_url'

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import re
from functools import reduce
import string

def durationToSecondsRegex(duration: str) -> int:
    """
    Parse duration string; return integer number of seconds.

    For example, the duration string "1h2m3s" (1 hour, 2 minutes, 3 seconds)
    would return 3723 seconds.