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Generate all permutations of a list without adjacent equal elements
...i - 1] == lst[i] for i in range(1, len(lst)))
def test(lst):
perms = set(permutations(lst))
opt = min(map(defects, perms))
slow = {perm for perm in perms if defects(perm) == opt}
fast = set(enum(lst))
print(lst, fast, slow)
assert slow == fast
for r in range(10000):
t...
Is there a way to select sibling nodes?
... Note that jquery.siblings() excludes the current node from the result set.
– cletus
May 9 '09 at 0:14
3
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Understanding slice notation
... What really annoys me is that python says that when you don't set the start and the end, they default to 0 and the length of sequence. So, in theory, when you use "abcdef"[::-1] it should be transformed to "abcdef"[0:6:-1], but these two expressions does not get the same output. I feel ...
How to format a number as percentage in R?
... "100%" "10 000%"
Customize this by adding arguments inside the first set of parentheses.
label_percent(big.mark = ",", suffix = " percent")(x)
## [1] "-100 percent" "0 percent" "10 percent"
## [4] "56 percent" "100 percent" "10,000 percent"
An update, several years later...
Java Reflection: How to get the name of a variable?
...
All you need to do is make an array of fields and then set it to the class you want like shown below.
Field fld[] = (class name).class.getDeclaredFields();
for(Field x : fld)
{System.out.println(x);}
For example if you did
Field fld[] = Integer.class.getDeclaredFields();
...
What IDE to use for Python? [closed]
What IDEs ("GUIs/editors") do others use for Python coding?
1 Answer
1
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How do I check if file exists in Makefile so I can delete it?
In the clean section of my Makefile I am trying to check if the file exists before deleting permanently. I use this code but I receive errors.
...
Copying files from Docker container to host
I'm thinking of using Docker to build my dependencies on a Continuous Integration (CI) server, so that I don't have to install all the runtimes and libraries on the agents themselves.
...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...ER JOIN table2 ON table2.SomeFkId = table1.SomeId
That gets you a result set where child rows in table2 cause duplication by returning the table1 results for each child row in table2. O/R mappers should differentiate table1 instances based on a unique key field, then use all the table2 columns to...
How to find out line-endings in a text file?
...
In vi...
:set list to see line-endings.
:set nolist to go back to normal.
While I don't think you can see \n or \r\n in vi, you can see which type of file it is (UNIX, DOS, etc.) to infer which line endings it has...
:set ff
Alter...