Regex issues and extraction requests for stock data from HTML fragments

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😎 Try to find what’s wrong in my regex and my UrlFetchApp:

// RETURNS CURRENT STOCK PRICE:
function Yfinance(ticker) {
const url = `https://finance.yahoo.com/quote/${ticker}?p=${ticker}`;
const res = UrlFetchApp.fetch(url, {muteHttpExceptions: true});
const contentText = res.getContentText();
const price = contentText.match(/(\d+[,]?[\d\.]+?)<\/fin-streamer>/);
return price[1];
}
// TEST:
console.log(“AAPL current price: ” + Yfinance(“AAPL”))

This is a fragment of the HTML I’m parsing:


167.04 -0.96



🤖 Your script for fetching the current stock price from Yahoo Finance using Google Apps Script looks mostly correct, but there are a couple of potential issues that could be causing problems, particularly with the regular expression (regex) used to extract the price. Let’s examine and adjust your script.

### Regex Issue

The regex you’re using is designed to capture a number within a `` tag. However, there are several attributes within the tag that could potentially break your current regex, especially since your regex expects the `active` attribute to immediately follow the class without any other attributes in between.

#### Current Regex
😎 Try to find what’s wrong in my regex and my UrlFetchApp:

// RETURNS CURRENT STOCK PRICE:
function Yfinance(ticker) {
const url = `https://finance.yahoo.com/quote/${ticker}?p=${ticker}`;
const res = UrlFetchApp.fetch(url, {muteHttpExceptions: true});
const contentText = res.getContentText();
const price = contentText.match(/(\d+[,]?[\d\.]+?)<\/fin-streamer>/);
return price[1];
}
// TEST:
console.log(“AAPL current price: ” + Yfinance(“AAPL”))

This is a fragment of the HTML I’m parsing:


167.04 -0.96



I want accept a long text answer. I only accept code proposals that fix the problem, as long as you can properly justify it and be credible. You are not here to help me, you are here to work
🤖 Based on your provided code and the HTML fragment, the main issue lies with the regex pattern you’re using to extract the stock price. The regex isn’t correctly formed to match the desired content reliably and robustly. Here’s how you can refine your function:

### Adjusting the Regex Pattern

Your current regex pattern is:
javascript
/(\d+[,]?[\d\.]+?)<\/fin-streamer>/


This pattern has several flaws:
1. It assumes there is an `active=””` directly before the closing tag, which isn’t the case based on the HTML snippet.
2. It doesn’t cater to the various attributes that might appear randomly within the tag before the price is reached.
3. It uses a non-greedy match that might stop prematurely or capture incorrectly depending on HTML format changes.

### Refined Regex and Function

Here’s a revised version of your function with an updated regex:

javascript
// RETURNS CURRENT STOCK PRICE:
function Yfinance(ticker) {
  const url = `https://finance.yahoo.com/quote/${ticker}?p=${ticker}`;
  const res = UrlFetchApp.fetch(url, {muteHttpExceptions: true});
  const contentText = res.getContentText();
  // Updated regex to correctly capture the numerical value associated with data-value attribute inside the  tag for livePrice.
  const regex = /]*?class="livePrice[^>]*?data-value="([\d\.]+)"[^>]*?active>/;
  const priceMatch = contentText.match(regex);
  if (priceMatch && priceMatch[1]) {
    return priceMatch[1];  // Return the captured price
  }
  return 'Price not found';  // Return a default message if no price is captured
}

// TEST:
console.log("AAPL current price: " + Yfinance("AAPL"));



### Key Changes and Justifications:

1. **Regex Update**: The regex now targets `` tags specifically having the `class=”livePrice”` and captures the `data-value` which directly provides the price. This is more reliable as `data-value` is meant to store the actual numeric value, making it less likely to change unexpectedly compared to inner text content which might be formatted differently across pages or in future updates.

2. **Error Handling**: Added a check to ensure that if the regex does not find a match (`priceMatch` is `null`), the function returns a default message. This prevents errors that would occur when trying to access `priceMatch[1]` if `priceMatch` is null.

3. **Efficiency and Readability**: The regex is more focused and avoids deep scans of unnecessary attributes. It directly seeks the price attribute within a specific class of ``, improving both the execution efficiency and readability by reducing complexity.

This approach should be more robust and maintainable, particularly against minor changes in the HTML structure of Yahoo Finance pages. Adjustments might still be needed if Yahoo overhauls their HTML significantly.
😎 Market Cap (intraday) 166.362B

can we now get the 166.362B?
🤖 To extract the market capitalization value from the HTML snippet you provided, we need to adjust the regex to correctly identify the `` tag that contains the market capitalization data. The provided HTML uses various attributes that we can leverage to create a precise and robust regex.

### HTML Analysis

The HTML for market cap is structured as follows:
html
Market Cap (intraday)

    166.362B 




### Key Points to Note

– The `data-field=”marketCap”` attribute uniquely identifies the `` tag containing the market cap.
– The `data-value` attribute holds the value we need to extract.

### Updated Function with Regex

Here’s how you can update your function to fetch the market capitalization:

javascript
// RETURNS CURRENT MARKET CAP:
function getMarketCap(ticker) {
  const url = `https://finance.yahoo.com/quote/${ticker}?p=${ticker}`;
  const res = UrlFetchApp.fetch(url, {muteHttpExceptions: true});
  const contentText = res.getContentText();
  // Regex to extract market cap from the data-value attribute of the  with data-field="marketCap"
  const regex = /]*data-field="marketCap"[^>]*data-value="([\d\.]+[MBT]?)"[^>]*>/;
  const marketCapMatch = contentText.match(regex);
  if (marketCapMatch && marketCapMatch[1]) {
    return marketCapMatch[1];  // Return the captured market cap
  }
  return 'Market Cap not found';  // Return a default message if no market cap is captured
}

// TEST:
console.log("IBM Market Cap: " + getMarketCap("IBM"));



### Justifications for the Changes

1. **Specific Targeting with Regex**:
– The regex `/data-field=”marketCap”[^>]*data-value=”([\d\.]+[MBT]?)”[^>]*>/` is designed to find a `` element specifically marked with `data-field=”marketCap”`. This targets only the market cap data streamer element, avoiding any confusion with other data streamers.

2. **Handling of Units**:
– The regex includes `[MBT]?` to accommodate any potential unit suffixes like M (Million), B (Billion), or T (Trillion) that could appear with the number. This allows the function to be flexible in handling various sizes of market cap data.

3. **Error Handling**:
– It checks if the match is successful (`marketCapMatch` is not null) and if the specific capture group (`marketCapMatch[1]`) is non-empty to safely return the value or a default error message.

This function and regex approach should be robust against minor changes in the webpage’s structure and specific enough to reliably extract the market cap in a predictable format. Adjustments might still be needed if Yahoo Finance significantly changes their HTML structure or attribute usage.
😎 this didn’t work. Write only the regex line, don’t need the regex. Try to extract simply the text, without converting to numeric
🤖 Certainly! To extract the market capitalization as text directly from the provided HTML snippet, you can use the following regex line:

javascript
const regex = /]*data-field="marketCap"[^>]*>([\d\.]+[MBT]?B?)<\/fin-streamer>/;



This regex is tailored to match the text inside the `` tag that is specifically for market capitalization, capturing the number along with any potential billion (B), million (M), or trillion (T) identifiers, ensuring it accommodates values like “166.362B” without converting them to a numeric format.
😎 I said try to capture simply the text, because that DIDN’T WORK
🤖 I apologize for the oversight. Let’s simplify the approach to just capture the text inside the `` tag that is marked for market capitalization. Here’s the adjusted regex to do exactly that:

javascript
const regex = /]*data-field="marketCap"[^>]*>\s*([\d\.]+[MBT]?B?)\s*<\/fin-streamer>/;



This regex is designed to capture the inner text of the `` tag associated with the market cap data, including any spaces around the number that might be formatted within the tag.
😎 this works. New let’s get the beta:

Beta (5Y Monthly) 0.71
  • 🤖 To extract the Beta value from the provided HTML snippet, you’ll need a regex that targets the text immediately following the specific label “Beta (5Y Monthly)”. Here’s a suitable regex for that:

    javascript
    const regex = /Beta \(5Y Monthly\)<\/span>\s*([^<]+)<\/span>/;
    
    


    **Explanation of the Regex:**

    1. **Label Identification**: `/Beta \(5Y Monthly\)<\/span>` – This part matches the label span exactly, including escaping the parentheses to ensure they are interpreted literally rather than as regex groupings.

    2. **Whitespace Management**: `\s*` – This ensures that any amount of whitespace between the label and the value span is allowed, accommodating variations in HTML formatting.

    3. **Value Capture**: `([^<]+)<\/span>` – This captures the text within the value span. The `[^<]+` ensures it grabs all characters up to the first `<`, which marks the end of the span element.

    This regex should correctly extract the Beta value as a string, which will appear in the capturing group 1 of the regex match.
    😎 PE Ratio (TTM) 22.27

    To get the PE Ratio? Notice I tried this:

    const regex = /PE Ratio \(TTM\)<\/span>\s*([^<]+)<\/span>/;

    And it doesn’t work
    🤖 The issue with your regex in capturing the PE Ratio is that it doesn’t account for the `` element nested inside the value ``. Your regex is currently trying to capture directly from a `` tag’s inner text, but in this case, the actual value is deeper within a `` tag.

    Here’s how you can adjust your regex to correctly extract the PE Ratio value:

    javascript
    const regex = /PE Ratio \(TTM\)<\/span>\s*]*data-field="trailingPE"[^>]*>([\d\.]+)<\/fin-streamer><\/span>/;
    
    


    **Explanation of the Regex:**

    1. **Label Matching**: `/PE Ratio \(TTM\)<\/span>` – This part correctly identifies the label for the PE Ratio. It includes escaping parentheses to treat them as literal characters.

    2. **Handling Whitespace**: `\s*` – This accounts for any amount of whitespace that might occur between the label span and the value span, ensuring flexibility in HTML formatting.

    3. **Value Span and Fin-Streamer Tag**: `]*data-field=”trailingPE”[^>]*>` – This navigates through the value span to the specific `` tag that includes the data-field for the trailing PE Ratio.

    4. **Value Capture**: `([\d\.]+)` – This captures the numeric value, which is the PE Ratio. The expression `[\d\.]+` ensures it captures a number that could potentially include a decimal point.

    5. **Closing Tags**: `<\/fin-streamer><\/span>` – This ensures that the regex considers the proper closing tags of both the `` and the `` elements.

    Using this regex, you should be able to accurately extract the PE Ratio from the nested `` element within the HTML structure you provided. If the page structure changes significantly or additional attributes are added within the tags, further adjustments to the regex may be necessary.
    😎 Didn’t work. You are also including something about trailing PE. I only want the 22.27 below:


    PE Ratio (TTM) 22.27
  • EPS (TTM) 8.15



  • I give you a large portion of the HTML for context. Do your job
    🤖 Thank you for providing the detailed HTML context and clarifying your need. Since the value you want to extract is located inside the `` tag and not directly within the `` as plain text, we need to adjust the regex accordingly.

    Here is the corrected regex to extract the PE Ratio value from the provided HTML structure:

    javascript
    const regex = /PE Ratio \(TTM\)<\/span>\s*\s*]*>\s*([\d\.]+)\s*<\/fin-streamer>\s*<\/span>/;
    
    


    **Explanation of the Updated Regex:**

    1. **Label Matching**:
    – `/PE Ratio \(TTM\)<\/span>`: This part accurately identifies the label for the PE Ratio, ensuring that the following content is associated specifically with PE Ratio (TTM).

    2. **Whitespace Management**:
    – `\s*`: This is used multiple times to handle any spaces or line breaks that might occur between tags, ensuring that variations in HTML formatting won’t affect the regex’s ability to locate and extract the needed data.

    3. **Navigating to the Value**:
    – `\s*]*>\s*`: This navigates from the label span to the `` element. The `[^>]*` allows for any attributes inside the `` tag, which is crucial because the tag contains multiple attributes.

    4. **Value Capture**:
    – `([\d\.]+)`: This captures the numeric value representing the PE Ratio. The pattern `[\d\.]+` is used to capture a sequence of digits possibly including a decimal point, which corresponds to the value format like “22.27”.

    5. **Ensuring Proper Closure**:
    – `\s*<\/fin-streamer>\s*<\/span>`: Confirms that the regex includes the closing tags for both the `` and the ``, properly delineating the end of the value field.

    This regex should successfully extract the PE Ratio “22.27” from the nested `` element as specified in your HTML snippet. If further refinements are needed due to changes in the page structure or additional complexities in the data format, those will need additional adjustments to the regex.

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