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What is the meaning of #XXX in code comments?
...and #FIXME are two other fix markers vim highlights but what does #XXX mean?
10 Answers
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How to use onSavedInstanceState example please
...ted automatically by Android as long as you assign an ID to them. So that means most of the UI state is taken care of without issue. Only when you need to store other data does this become an issue.
From Android Docs:
The only work required by you is to
provide a unique ID (with the
andro...
Redis key naming conventions?
...to query for just the beginning of the key to return all
users?
If you mean someting like directly querying for all keys which starts with user: there is a keys command for that. This command should be however used only for debugging purpose since it's O(N) because it's searching through all key...
Mean per group in a data.frame [duplicate]
I have a data.frame and I need to calculate the mean per group (i.e. per Month , below).
8 Answers
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Android add placeholder text to EditText
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If you mean the location where you will add it in the layout.
You can define a container like a FrameLayout and add this EditText to it when it is created.
<LinearLayout xmlns=".."/>
<FrameLayout xmlns:android="http://...
Get screen width and height in Android
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Means your method 2 is equal to method 4
– Trikaldarshi
Sep 24 '13 at 13:54
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What does “where T : class, new()” mean?
Can you please explain to me what where T : class, new() means in the following line of code?
11 Answers
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What is the error “Every derived table must have its own alias” in MySQL?
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@ToBe I'm curious what you meant by that? The answer holds true in any query, that if you have a derived table in your from clause you need to give it an alias.
– AdamMc331
May 4 '15 at 13:11
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Change default primary key in Eloquent
...quent assumes that the primary key is an incrementing integer value, which means that by default the primary key will be cast to an int automatically. If you wish to use a non-incrementing or a non-numeric primary key you must set the public $incrementing property on your model to false.
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How do servlets work? Instantiation, sessions, shared variables and multithreading
...d upon. Just make sure that session ID is never exposed in URL or by other means in webpages so that the unaware enduser won't be attacked.
– BalusC
Nov 30 '11 at 13:45
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