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What is the difference between Google App Engine and Google Compute Engine?
...For example, if your app becomes very successful, App Engine will automatically create more instances to handle the increased volume.
Read more about App Engine
Compute Engine is an Infrastructure-as-a-Service. You have to create and configure your own virtual machine instances. It gives you more ...
Can I set subject/content of email using mailto:?
...
Yes, look all tips and tricks with mailto: http://www.angelfire.com/dc/html-webmaster/mailto.htm
mailto subject example:
<a href="mailto:no-one@snai1mai1.com?subject=free chocolate">example</a>
mailto with cont...
Replace input type=file by an image
...
This works really well for me:
.image-upload>input {
display: none;
}
<div class="image-upload">
<label for="file-input">
<img src="https://icon-library.net/images/upload-photo-icon/upload-photo-icon-21...
Test for existence of nested JavaScript object key
...his will allow you to safely access deeply nested properties, by using the token ?., the new optional chaining operator:
const value = obj?.level1?.level2?.level3
If any of the levels accessed is null or undefined the expression will resolve to undefined by itself.
The proposal also allows you ...
what is reverse() in Django
...gh POST request
User login post-validation
Reset password through JSON web tokens
Most of these involve some form of redirection, and a URL constructed through a set of parameters. Hope this adds to the already helpful thread of answers!
...
How do I call Objective-C code from Swift?
...tions: [NSObject: AnyObject]?) -> Bool {
Mixpanel.sharedInstanceWithToken("your-token")
return true
}
That's it!
Note: If you remove the bridging header file from your project, be sure to go into Build Settings and remove the value for "Objective-C Bridging Header" under "Swift Compile...
Working copy XXX locked and cleanup failed in SVN
...
While this technically works, it is such a bad way to do this compared to removing the locks that it deserves a downvote.
– Jukka Dahlbom
May 2 '12 at 13:02
...
Difference between $.ajax() and $.get() and $.load()
...imes very useful. You have to deal with the returned data yourself with a callback.
$.get() is just a shorthand for $.ajax() but abstracts some of the configurations away, setting reasonable default values for what it hides from you. Returns the data to a callback. It only allows GET-requests so is...
How to process each line received as a result of grep command
...ead loop, that will be fed by the result of the grep command using the so called process substitution:
while IFS= read -r result
do
#whatever with value $result
done < <(grep "xyz" abc.txt)
This way, you don't have to store the result in a variable, but directly "inject" its output to t...
Bash Script : what does #!/bin/bash mean? [duplicate]
...
That is called a shebang, it tells the shell what program to interpret the script with, when executed.
In your example, the script is to be interpreted and run by the bash shell.
Some other example shebangs are:
(From Wikipedia)
#...