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Is it possible to get element from HashMap by its position?
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HashMaps do not preserve ordering:
This class makes no guarantees as to
the order of the map; in particular,
it does not guarantee that the order
will remain constant over time.
Take a look at LinkedHashMap, which guarantees a predictable...
How do I set up IntelliJ IDEA for Android applications?
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ASP.NET MVC - Set custom IIdentity or IPrincipal
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Coming from PHP, I've always put the information like UserID and other pieces needed to grant restricted access in Session. Storing it client-side makes me nervous, can you comment on why that won't be a problem?
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Prepend a level to a pandas MultiIndex
...oo'
df.set_index('Firstlevel', append=True, inplace=True)
And change the order if needed with:
df.reorder_levels(['Firstlevel', 'A', 'B'])
Which results in:
Vals
Firstlevel A B
Foo a1 b1 0.871563
b2 0.494001
a2 b3 -0.167811
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How do I find the .NET version?
...sion 4.0. The v4.0.30319 is your Visual C# compiler version, therefore, in order to find the .NET framework version do the following.
Go to a command prompt and follow this path:
C:\Windows\Microsoft.NET\Framework\v4.0.30319 (or whatever the highest v number folder)
C:\Windows\Microsoft.NET\Frame...
Tricks to manage the available memory in an R session
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That's a good technique. When files are run in a certain order like that, I often prefix them with a number: 1-load.r, 2-explore.r, 3-model.r - that way it's obvious to others that there is some order present.
– hadley
Sep 4 '09 at 13:02
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Setting git parent pointer to a different parent
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From what I understand (from git.wiki.kernel.org/index.php/GraftPoint), git replace has superseded git grafts (assuming you have git 1.6.5 or later).
– Alexander Bird
May 23 '11 at 12:55
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How to save MySQL query output to excel or .txt file? [duplicate]
...ion which
accepts data in CSV format.
Given a query such as
SELECT order_id,product_name,qty FROM orders
which returns three columns of data, the results can be placed into
the file /tmp/orders.txt using the query:
SELECT order_id,product_name,qty FROM orders
INTO OUTFILE '/tmp/orde...
Booleans, conditional operators and autoboxing
...oolean.
So, the first example tries to call Boolean.booleanValue() in order to convert Boolean to boolean as per the first rule.
In the second case the first operand is of the null type, when the second is not of the reference type, so autoboxing conversion is applied:
Otherwise, the s...
Swift how to sort array of custom objects by property value
...rted(by: { $0.fileID > $1.fileID })
The example above gives desc sort order
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