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Solidity Notes

Notes I've assembled for myself during my journey of learning Solidity, some notes maybe incorrect as they are my own interpretation

Event Listeners

Allow clients to keep track of things. IE: Sent transactions, End of transactions, etc.

Declaring Event

event EventName(...args)

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Watch Logs

Set watches on the logs to be scanned, if a condition is met it triggers a watch https://www.elastic.co/guide/en/watcher/current/watch-log-data.html

Watch -> Condition (If True) -> Action (webhook or anywhere)

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## Watch Logs
> Set watches on the logs to be scanned, if a condition is met it triggers a watch
https://www.elastic.co/guide/en/watcher/current/watch-log-data.html

> `Watch` -> `Condition` (If True) -> `Action` (webhook or anywhere)

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9.1 Logic of Hypothesis Testing

Hypothesis Testing Steps

1. State Hypothesis

   H₀ - Null Hypothesis H₁ - Alternative Hypothesis

2. Specify Decision Rule

How to prove the null hypothesis with the evidence

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The past:

Relevance was always based on subject matter experts.

However...

We measure based on the relevance of the query, despite the fact that other documents may be relevant. It needs to pertain to the query -- that's what we care about.

Contignecy table:

	relevant	non-relevant

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// Quickly wrote this to save me time in class instead of calculating all of this stuff
/**
var d1 = [0.8, 0.7, 0.9, 0, 0, 0.2];
var d2 = [0.4, 0.3, 0.5, 0, 0, 0];
var d3 = [0.9, 0, 0.8, 0.5, 0, 0];
var d4 = [0.2, 0, 0, 0.8, 0, 0.9];
var d5 = [0.7, 0.9, 0.7, 0.4, 0, 0];
var d6 = [0.3, 0.6, 0.7, 0.7, 0, 0];

similarity(d1, d2, "dice"); // 0.8571428571428571

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What for?

Correcting for differences/size for the number of overlapping terms x or y being the size of document or vocabulary of DOC₁ to DOC₂

Cosine Coefficient

| x and y | / [x]^1/2 x [y]^1/2

Jaccard Coefficient

| x and x | / | x or y |

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Merging

Explains a Fast-Forward When Git Pull Hurts

Useful Alias

git up

git config --global alias.up '!git remote update -p; git merge --ff-only @{u}

Prunes remote branches and updates them, then fast-forward local branch from the Upstream branch. However, fails if there are local changes to prevent a merge conflict and undesired fast-forwarding.

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			// TODO: Will like to get back to this if I have time.
			// Goal would be to iterate through with a instance set containing different days and MostComments and Score. Then suggest the day with greatest probability based on model.

			// if (model.postList.length > 0) {
			// 	var forest = new forestjs.RandomForest();

			// 	var options = {}

			// 	options.numTrees = 100;

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module.exports = require('node-slackr');

// Set up server dependencies
var express = require('express'),
	bodyParser = require('body-parser'),
	app = express();

// App usage
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));