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Preview an image before it is uploaded
...
$("#imgInp").change(function() {
readURL(this);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form runat="server">
<input type='file' id="imgInp" />
<img id="blah" src="#" alt="your image" />
</form>
...
Explain which gitignore rule is ignoring my file
...ignored have been mistakenly added to the index.
See commit 8231fa6 from https://github.com/flashydave:
check-ignore currently shows how .gitignore rules would treat untracked paths. Tracked paths do not generate useful output.
This prevents debugging of why a path became tracked unexpectedl...
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
Spring Cache @Cacheable - not working while calling from another method of the same bean
...internal' calls within the same class will not get the cached value.
From https://code.google.com/p/ehcache-spring-annotations/wiki/UsingCacheable
Only external method calls coming in through the proxy are
intercepted. This means that self-invocation, in effect, a method
within the target o...
How do I capture response of form.submit
...ference to the form element instead of using event.target.)
Docs:
Fetch:
https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API
Other:
https://developer.mozilla.org/en-US/docs/Learn/HTML/Forms/Sending_forms_through_JavaScript
That page in 2018 does not mention fetch (yet).
But it mentions tha...
How to read a text file into a string variable and strip newlines?
... to use with or close the file explicitly. Short is not always better. See https://stackoverflow.com/a/7396043/362951
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Automatically enter SSH password with script
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Use public key authentication: https://help.ubuntu.com/community/SSH/OpenSSH/Keys
In the source host run this only once:
ssh-keygen -t rsa # ENTER to every field
ssh-copy-id myname@somehost
That's all, after that you'll be able to do ssh without passwo...
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 do I assign a port mapping to an existing Docker container?
...s approach. You can also change the restart flag here.
P.S. You may visit https://docs.docker.com/engine/admin/ to learn how to correctly restart your docker engine as per your host machine. I used sudo systemctl restart docker to restart my docker engine that is running on Ubuntu 16.04
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Android update activity UI from service
...ew task, I want to refresh the activity UI to show that info.
I did find https://github.com/commonsguy/cw-andtutorials/tree/master/18-LocalService/ this example. Is that a good approch ? Any other examples?
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