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How can I call controller/view helper methods from the console in Ruby on Rails?
...=\"bar\">foo</a>"
ActionController::Base.helpers.image_tag('logo.png') #=> "<img alt=\"Logo\" src=\"/images/logo.png\" />"
Render:
views = Rails::Application::Configuration.new(Rails.root).paths["app/views"]
views_helper = ActionView::Base.new views
views_helper.render 'myview...
RegEx to parse or validate Base64 data
...
To validate base64 image we can use this regex
/^data:image/(?:gif|png|jpeg|bmp|webp)(?:;charset=utf-8)?;base64,(?:[A-Za-z0-9]|[+/])+={0,2}
private validBase64Image(base64Image: string): boolean {
const regex = /^data:image\/(?:gif|png|jpeg|bmp|webp)(?:;charset=utf-8)?;base64,(?:[A-Z...
Uploading images using Node.js, Express, and Mongoose
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other useful req.files properties:
size (in bytes)
type (e.g., 'image/png')
lastModifiedate
_writeStream.encoding (e.g, 'binary')
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ASP.Net MVC: How to display a byte array image from model
... byte[] photoBack = item.InternalImage;
return File(photoBack, "image/png");
}
View
@model YourNameSpace.Models.Item
@{
ViewBag.Title = "Details";
}
<h2>Details</h2>
<div>
<h4>Item</h4>
<hr />
<dl class="dl-horizontal">
<img src="@Url.A...
Display image as grayscale using matplotlib
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The following code will load an image from a file image.png and will display it as grayscale.
import numpy as np
import matplotlib.pyplot as plt
from PIL import Image
fname = 'image.png'
image = Image.open(fname).convert("L")
arr = np.asarray(image)
plt.imshow(arr, cmap='gray', ...
Draw in Canvas by finger, Android
...lutePath();
File file = new File("/sdcard/"+name+".png");
try
{
if(!file.exists())
{
file.createNewFile();
}
...
Changing the image source using jQuery
...(document).ready(function () {
$("#img1").attr({ "src": "logo-ex-7.png" });
$("#img2").attr({ "src": "logo-ex-8.png" });
});
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CSS3 gradient background set on body doesn't stretch but instead repeats?
...tml tag to 100% does weird things in Internet Explorer. Here's an example (png).
– Justin Force
May 11 '12 at 17:01
21
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Chrome desktop notification example [closed]
...e', {
icon: 'http://cdn.sstatic.net/stackexchange/img/logos/so/so-icon.png',
body: 'Hey there! You\'ve been notified!',
});
notification.onclick = function() {
window.open('http://stackoverflow.com/a/13328397/1269037');
};
}
}
<button onclick="notifyMe()">Notify me!&l...
css z-index lost after webkit transform translate3d
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<img src="http://www.google.com/intl/en_com/images/srpr/logo3w.png">
</div>
<div id="element_b">
<img src="http://www.google.com/intl/en_com/images/srpr/logo3w.png">
</div>
</body>
...