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How do you query for “is not null” in Mongo?

...ObjectId("544540c51b5cf91c4893eb96"), "imageUrl" : "http://example.com/foo.png" } { "_id" : ObjectId("544540c91b5cf91c4893eb97"), "imageUrl" : "http://example.com/bar.png" } { "_id" : ObjectId("544540ed1b5cf91c4893eb98"), "otherField" : 1 } { "_id" : ObjectId("544540f11b5cf91c4893eb99"), "otherField...
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make an html svg object also a clickable link

... The easiest way is to not use <object>. Instead use an <img> tag and the anchor should work just fine. share | improve this answer | follow ...
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Paperclip::Errors::MissingRequiredValidatorError with Rails 4

...ontent_type :image, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"] -OR- another way validates_attachment :image, content_type: { content_type: ["image/jpg", "image/jpeg", "image/png", "image/gif"] } -OR- yet another way is to use regex for validating content type. ...
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Twitter Bootstrap CSS affecting Google Maps

... With Bootstrap 2.0, this seemed to do the trick: #mapCanvas img { max-width: none; } share | improve this answer | follow | ...
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How to save an image locally using Python whose URL address I already know?

... = make_soup(url) #this makes a list of bs4 element tags images = [img for img in soup.findAll('img')] print (str(len(images)) + "images found.") print 'Downloading images to current working directory.' #compile our unicode list of image links image_links = [each.get('src') f...
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How do I escape a single quote ( ' ) in JavaScript? [duplicate]

...what the browser will see by the end. In this case, it will see this: <img src='something' onmouseover='change(' ex1')' /> In other words, the "onmouseover" attribute is just change(, and there's another "attribute" called ex1')' with no value. The truth is, HTML does not use \ for an esca...
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Swift how to sort array of custom objects by property value

...fileName: "Plane", fileID: 200) ] let sortedImages = images.sorted(by: { (img0: ImageFile, img1: ImageFile) -> Bool in return img0 > img1 }) //let sortedImages = images.sorted(by: >) // also works //let sortedImages = images.sorted { $0 > $1 } // also works print(sortedImages) /* ...
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Wait for all promises to resolve

...promise. Example: In my example, I need to replace the src attributes of img tags with different mirror urls if available before rendering the content. var img_tags = content.querySelectorAll('img'); function checkMirrorAvailability(url) { // blah blah return promise; } function chan...
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How do I check if file exists in jQuery or pure JavaScript?

... This works for me: function ImageExist(url) { var img = new Image(); img.src = url; return img.height != 0; } share | improve this answer | fo...
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JS - get image width and height from the base64 code

I have a base64 img encoded that you can find here . How can I get the height and the width of it? 4 Answers ...