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What does “export” do in shell programming? [duplicate]
As far as I can tell, variable assignment is the same whether it is or is not preceded by "export". What's it for?
3 Answer...
How to read the value of a private field from a different class in Java?
I have a poorly designed class in a 3rd-party JAR and I need to access one of its private fields. For example,
why should I need to choose private field is it necessary?
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Is there a vim command to relocate a tab?
How can I change the position / order of my current tab in Vim ? For example, if I want to reposition my current tab to be the first tab?
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Static linking vs dynamic linking
Are there any compelling performance reasons to choose static linking over dynamic linking or vice versa in certain situations? I've heard or read the following, but I don't know enough on the subject to vouch for its veracity.
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Detect HTTP or HTTPS then force HTTPS in JavaScript
Is there any way to detect HTTP or HTTPS and then force usage of HTTPS with JavaScript?
13 Answers
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Provide an image for WhatsApp link sharing
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2020 standards
It takes a few steps to get the perfect preview for WhatsApp, Twitter, Facebook and bookmark icons for pc's and mobile devices. If you like reading go to ogp.me - but make sure to read steps 1 - 6 in this answer to get the best WhatsApp preview.
Please note: some apps or we...
In Python, how do I use urllib to see if a website is 404 or 200?
...n python2.6) returns the HTTP status code that was sent with the response, or None if the URL is no HTTP URL.
>>> a=urllib.urlopen('http://www.google.com/asdfsf')
>>> a.getcode()
404
>>> a=urllib.urlopen('http://www.google.com/')
>>> a.getcode()
200
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An expression tree may not contain a call or invocation that uses optional arguments
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The underlying expression tree API does not support optional arguments.
For IL-compiled code the C# compiler inserts the default values at compile time (hard-coded), because the CLR does not support calling methods with optional arguments either when the arguments are not...
Android Fragments: When to use hide/show or add/remove/replace?
...all of the teardown events in the lifecycle (onPause, onStop, etc) and if for some reason you need that fragment again you would have to insert it back into the container and let it run through all of its initialization again.
If there is a high probability that you will need that fragment again, ...
Why are global variables evil? [closed]
... python (and in programming in general). Can somebody explain? Links with more info would also be appreciated.
4 Answers
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