大约有 40,000 项符合查询结果（耗时：0.0762秒） [XML]
How do I create a SHA1 hash in ruby?
...hat's this 'serialize' function? that's not a part of ruby. Worse yet, the string being passed to hexdigest isn't dynamic at all! This method would return the same hash regardless what data you give it!
– Blixxy
Jul 7 '12 at 10:10
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How to form tuple column from two columns in Pandas
...rtable with zip. It comes in handy when dealing with column data.
df['new_col'] = list(zip(df.lat, df.long))
It's less complicated and faster than using apply or map. Something like np.dstack is twice as fast as zip, but wouldn't give you tuples.
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invalid command code ., despite escaping periods, using sed
...
i used an empty string '' as the parameter for -i and that worked, like sed -i '' 's/blah/xx/g'
– Pierre Houston
Aug 29 '14 at 8:59
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Set encoding and fileencoding to utf-8 in Vim
...oding' is set to it. If all fail, 'fileencoding' is set to
an empty string, which means the value of 'encoding' is used.
See :help filencodings
If you often work with e.g. cp1252, you can add it there:
set fileencodings=ucs-bom,utf-8,cp1252,default,latin9
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Renaming table in rails
...ion:
class RenameFoo < ActiveRecord::Migration
def self.up
rename_table :foo, :bar
end
def self.down
rename_table :bar, :foo
end
end
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Getting result of dynamic SQL into a variable for sql-server
...ABLE''
AND OBJECT_NAME =''' || vTBL_CLIENT_MASTER || '''';
PRINT_STRING(VMYQUERY);
EXECUTE IMMEDIATE vMYQUERY INTO VCOUNTTEMP ;
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Storing JSON in database vs. having a new column for each key
... perform a text-search on it.
value per column instead matches the whole string.
Your approach (JSON based data) is fine for data you don't need to search by, and just need to display along with your normal data.
Edit: Just to clarify, the above goes for classic relational databases. NoSQL use J...
Virtual Serial Port for Linux
...:
echo "Test" > /dev/pts/3
Now back to Terminal 1 and you'll see the string "Test".
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What's a standard way to do a no-op in python?
...n existing code idiom like a comprehension, or a lambda, or (god forbid) a string to be passed into eval(…) (which q.v. docs.python.org/3/library/functions.html#eval if you must).
– fish2000
Apr 23 '18 at 23:26
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Can anyone explain IEnumerable and IEnumerator to me? [closed]
...:
// This seems reasonable ...
public class Program
{
static void Main(string[] args)
{
Console.WriteLine("***** Fun with IEnumerable / IEnumerator *****\n");
Garage carLot = new Garage();
// Hand over each car in the collection?
foreach (Car c in carLot)
{
...