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App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
...lumn; align-items: center; } .feedback-pop:hover, .feedback-pop .feedback-img:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } 文档反馈 ...
How to get a file or blob from an object URL?
...hen(blobFile => new File([blobFile], "fileNameGoesHere", { type: "image/png" })
– dbakiu
Feb 13 '19 at 16:11
...
Deny access to one specific folder in .htaccess
...le under the security code you just inserted.
<FilesMatch "\.(jpg|gif|png|php)$">
Order Deny,Allow
Allow from all
</FilesMatch>
your final .htaccess file will look like
Order Allow,Deny
Deny from all
<FilesMatch "\.(jpg|gif|png|php)$">
Order Deny,Allow
Allow from all...
How to flip UIImage horizontally?
...
Objective-C
UIImage* sourceImage = [UIImage imageNamed:@"whatever.png"];
UIImage* flippedImage = [UIImage imageWithCGImage:sourceImage.CGImage
scale:sourceImage.scale
orientation:UIImageOrientationUpMirrored...
Strip HTML from strings in Python
...nswer to this question.
Look at this string (source and discussion):
<img<!-- --> src=x onerror=alert(1);//><!-- -->
The first time HTMLParser sees it, it can't tell that the <img...> is a tag. It looks broken, so HTMLParser doesn't get rid of it. It only takes out the ...
what exactly is device pixel ratio?
...ze to percentage values.
Example
#element { background-image: url('lores.png'); }
@media only screen and (min-device-pixel-ratio: 2) {
#element { background-image: url('hires.png'); }
}
@media only screen and (min-device-pixel-ratio: 3) {
#element { background-image: url('superhires.png'...
How can you profile a Python script?
...ut()):
code_to_profile()
Either of these will generate a pycallgraph.png file similar to the image below:
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...
Can I have an onclick effect in CSS?
...:
#btnControl {
display: none;
}
#btnControl:checked + label > img {
width: 70px;
height: 74px;
}
<input type="checkbox" id="btnControl"/>
<label class="btn" for="btnControl"><img src="https://placekitten.com/200/140" id="btnLeft" /></label>
With th...
Detect the Internet connection is offline?
... in Ajax applications.
Until that happens, either XHR or an Image() or <img> request can provide something close to the functionality you want.
Update (2014/11/16)
Major browsers now support this property, but your results will vary.
Quote from Mozilla Documentation:
In Chrome and Safari, if ...
Is there a wikipedia API just for retrieve content summary?
....wikimedia.org/wikipedia/en/thumb/f/fa/Stack_Overflow_homepage%2C_Feb_2017.png/320px-Stack_Overflow_homepage%2C_Feb_2017.png",
"width": 320,
"height": 149
},
"originalimage": {
"source": "https://upload.wikimedia.org/wikipedia/en/f/fa/Stack_Overflow_homepage%2C_Feb_2017.png",
"wi...