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Which Java Collection should I use?
...t, non-synchronized collections
Collection: An interface representing an unordered "bag" of items, called "elements". The "next" element is undefined (random).
Set: An interface representing a Collection with no duplicates.
HashSet: A Set backed by a Hashtable. Fastest and smallest memory usage, w...
Non-alphanumeric list order from os.listdir()
... to process directories of data. Recently, I have noticed that the default order of the lists has changed to something almost nonsensical. For example, if I am in a current directory containing the following subdirectories: run01, run02, ... run19, run20, and then I generate a list from the followin...
Sort points in clockwise order?
...n array of x,y points, how do I sort the points of this array in clockwise order (around their overall average center point)? My goal is to pass the points to a line-creation function to end up with something looking rather "solid", as convex as possible with no lines intersecting.
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Can one do a for each loop in java in reverse order?
I need to run through a List in reverse order using Java.
13 Answers
13
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LINQ OrderBy versus ThenBy
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You should definitely use ThenBy rather than multiple OrderBy calls.
I would suggest this:
tmp = invoices.InvoiceCollection
.OrderBy(o => o.InvoiceOwner.LastName)
.ThenBy(o => o.InvoiceOwner.FirstName)
.ThenBy(o => o.InvoiceID...
makefile execute another target
...se of parallel builds with make’s -j option?
There's a way of fixing the order. From the make manual, section 4.2:
Occasionally, however, you have a situation where you want to impose a specific ordering on the rules to be invoked without forcing the target to be updated if one of those rules is ...
Syntax behind sorted(key=lambda: …)
...ment and use that to create a transformed list which will inform me on the order of final sorted list.
Check it out:
mylist = [3,6,3,2,4,8,23]
sorted(mylist, key=WhatToSortBy)
Base example:
sorted(mylist)
[2, 3, 3, 4, 6, 8, 23] # all numbers are in order from small to large.
Example 1...
Is a Python list guaranteed to have its elements stay in the order they are inserted in?
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Yes, the order of elements in a python list is persistent.
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Sorting HashMap by values [duplicate]
... it works fine for me. You can choose both Ascending as well as descending order
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry...
How do I select an entire row which has the largest ID in the table?
... only want one such row, use @MichaelMior's answer,
SELECT row from table ORDER BY id DESC LIMIT 1
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