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Check if object exists in JavaScript
...t - is an object, the alert would be shown.
I have an example in my site.
https://sites.google.com/site/javaerrorsandsolutions/home/javascript-dynamic-checkboxes
Firebase Storage How to store and Retrieve images [closed]
...ller images (under 10mb)
We have an example project that does that here: https://github.com/firebase/firepano
The general approach is to load the file locally (using FileReader) so you can then store it in Firebase just as you would any other data. Since images are binary files, you'll want to g...
How to apply a CSS filter to a background image
...;
right: 0;
z-index: 1;
display: block;
background-image: url('https://i.imgur.com/lL6tQfy.png');
width: 1200px;
height: 800px;
-webkit-filter: blur(5px);
-moz-filter: blur(5px);
-o-filter: blur(5px);
-ms-filter: blur(5px);
filter: blur(5px);
}
.content {
posi...
Stop/Close webcam which is opened by navigator.getUserMedia
...ream (audio or video) and stop each of them individually.
More info here: https://developers.google.com/web/updates/2015/07/mediastream-deprecations?hl=en#stop-ended-and-active
Example (from the link above):
stream.getTracks().forEach(function(track) {
track.stop();
});
Browser sup...
How do you manage your gists on GitHub? [closed]
...ter the post.
The script also supports sync all your gists (gister sync).
https://github.com/weakish/gister/
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How can I make a Python script standalone executable to run without ANY dependency?
...e --onefile MyCode.py
You can create a single file, among other options (https://pyinstaller.readthedocs.io/en/stable/usage.html#options).
I had only one problem using PyInstaller and multiprocessing package that was solved by using this recipe: https://github.com/pyinstaller/pyinstaller/wiki/Rec...
Any good, visual HTML5 Editor or IDE? [closed]
...wnload "Eclipse IDE for Java EE Developers" Latest Stable Version Download Google Plugin for Eclipse.zip Select your download according to your Eclipse Version After Downloading (don't Unzip) Open Eclipse Help > Install New Software > Add > Archive > Select the Downloaded Plug-in.zip
in ...
Rails: convert UTC DateTime to another time zone
...es the default timezone set in config.time_zone
More details I explain at https://stackoverflow.com/a/25055692/542995
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What is RSS and VSZ in Linux memory management
...lowing references:
http://manpages.ubuntu.com/manpages/en/man1/ps.1.html
https://web.archive.org/web/20120520221529/http://emilics.com/blog/article/mconsumption.html
Also see:
A way to determine a process's "real" memory usage, i.e. private dirty RSS?
...
JavaScript to scroll long page to DIV
...e parameters inside an object {}.
If you would still have problems, go to https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoView
There is detailed documentation for this method.
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