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Ingolme

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Everything posted by Ingolme

  1. SVG does not have a <canvas> element. The <foreignObject> tag might work to embed an HTML5 <canvas> element but I'm not sure how well <foreignObject> works. Instead of trying to embed the <canvas> in an SVG document, you could put the SVG code in a separate file and load its filter with the CSS filter property.
  2. Ingolme

    Background Image

    You can set the background-position to bottom left
  3. Please do not reply to old topics.
  4. HTML started allowing nesting blocks inside <a> elements when it transitioned to version 5 because there are so many use cases for hyperlink blocks. I still just set the display of <a> elements to "block" with CSS to avoid an unnecessary <div> inside it unless the structure is complicated.
  5. The more general solution would be to have a string containing the name of the method and use the square brackets notation to access it. var methodName = "toUpperCase"; var str = "Hello World!"; var result = str[methodName](); This solution only works with methods that don't take arguments, of course.
  6. The safest way is to decide a list of permitted methods, and then use a switch() statement to choose which one you want to run: var newResult; switch(userSelectedMethod) { case "toUpperCase()": newResult = enteredText.toUpperCase(); break; case "toLowerCase()": newResult = enteredText.toLowerCase(); break; default: newResult = enteredText; } If you tried to generalize further than that, it's likely that the user will break something by putting invalid methods or something that could alter the control of your program.
  7. Use window.open() to open a URL in a new tab.
  8. From the MySQL reference manual ( https://dev.mysql.com/doc/refman/8.0/en/string-comparison-functions.html#operator_like )
  9. Yes, you can use the code provided in the examples to build your website.
  10. I'm a bit late here, but it's OK to use the code examples from the W3Schools website on your own website. They're very simple and could easily be replicated accidentally, so that can't really fall under copyright protection even if W3Schools was interested in protecting it. The only way you would run into legal problems is if you are copying those code samples into tutorials on your own website.
  11. CSS can't do it. Ideally, the server-side language would do it. If this is a plain HTML page with no server-side language, the best option is formatting the numbers correctly when writing the HTML. If none of the previous cases apply, Javascript should be able to modify the numbers. In Javascript, toLocaleString() will format the numbers.
  12. Ingolme

    Why use em?

    Source: https://webdesign.tutsplus.com/tutorials/comprehensive-guide-when-to-use-em-vs-rem--cms-23984
  13. Xpath can't read Java variables. You have to put the variable outside of the string. "//*[contains(text(),'" + x + "')]"
  14. What errors were being shown?
  15. Is this for homework? It's pretty obvious to me, but I wouldn't like to help you cheat at your homework, you wouldn't learn anything. A logical error is when the program compiles and runs just fine, but does not do what you want it to. To identify the logical error in your code, look at what the program is actually doing and compare it to what you want the program to do.
  16. The vh unit is a proportion of the available space in the window. 100vh should fill the window exactly with no scrollbars. If you are getting any scrollbars with 100vh, it's because you have padding, margins or other elements outside of the current one.
  17. Ingolme

    John

    Assuming that all of the table have the same DateTime values and the same number of rows, the query is not too difficult. If the different tables have different date times it becomes more complicated. The simple query would be like this: INSERT INTO `NewTable` (`DateTime`, `Object1Value`, `Object2Value`, `Object3Value`) SELECT t1.`DateTime`, t1.`Object1Value`, t2.`Object2Value`, t3.`Object3Value` FROM `Table1` AS t1 JOIN `Table2` AS t2 ON t2.`DateTime` = t1.`DateTime` JOIN `Table3` AS t3 ON t3.`DateTime` = t1.`DateTime` This may be very slow depending on how many rows there
  18. If you have multiple elements, you have to call the function multiple times. It could be done in a loop. var elements = document.getElementsByClassName("myClass"); for(var i = 0; i < elements.length; i++) { w3CodeColor(elements[i]); }
  19. The code from the TryIt example is actually running live in the browser, it is real output. 1, 3, 5 and 7 are correct. Every second node is whitespace.
  20. You'll have to learn to use the Canvas API. The simplest way to make a drawing application using canvas is to draw circles on each mousemove event while the mouse button is down, or on phones, using the touchstart, touchmove and touchend events. Once you managed to make a simple drawing application, then comes the difficult part: writing software to recognize shapes. There is an entire field of science dedicated to solving this one problem, it is not an easy task. It seems neural networks are the most common approach to solving it.
  21. This would take me hours. You have to replace all "\x##" in the strings the the ASCII character of that value. Then put line breaks on opening braces, closing braces and semi-colons. Then you have to indent all the code. Perhaps there are some automatic code deobfuscators out there but I've never looked for one. Why do you need to decode this? I'd sooner write new software from scratch then spend the time on this.
  22. If you read the thread instead of just the title, the question was regarding running Javascript from a local file.
  23. The file:/// protocol would be used for this, but browsers don't allow websites to load Javascript files from your filesystem for security reasons.
  24. Please do not reply to old topics.
  25. Wikipedia and other sources use images to represent mathematical expressions on a page. HTML is not well equipped to represent them. There is an XML-based language called MathML, but it is not well supported by browsers.
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