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Good Hash Function for Strings
I'm trying to think up a good hash function for strings. And I was thinking it might be a good idea to sum up the unicode values for the first five characters in the string (assuming it has five, otherwise stop where it ends). Would that be a good idea, or is it a bad one?
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Safely limiting Ansible playbooks to a single machine?
...ok's hosts using a variable, then passing in a specific host address via --extra-vars:
# file: user.yml (playbook)
---
- hosts: '{{ target }}'
user: ...
Running the playbook:
ansible-playbook user.yml --extra-vars "target=imac-2.local"
If {{ target }} isn't defined, the playbook does nothin...
XML attribute vs XML element
...butes vs. elements:
Use elements for long running text (usually those of string or
normalizedString types)
Do not use an attribute if there is grouping of two values (e.g.
eventStartDate and eventEndDate) for an element. In the previous example,
there should be a new element for "event" which ma...
Query for documents where array size is greater than 1
...le. See the server-side processing page
for more information.
2.Create extra field NamesArrayLength, update it with names array length and then use in queries:
db.accommodations.find({"NamesArrayLength": {$gt: 1} });
It will be better solution, and will work much faster (you can create index ...
psycopg2: insert multiple rows with one query
... 3, cursor.mogrify() returns bytes, cursor.execute() takes either bytes or strings, and ','.join() expects str instance.
So in Python 3 you may need to modify @ant32 's code, by adding .decode('utf-8'):
args_str = ','.join(cur.mogrify("(%s,%s,%s,%s,%s,%s,%s,%s,%s)", x).decode('utf-8') for x in tup...
Character reading from file in Python
In a text file, there is a string "I don't like this".
8 Answers
8
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Receiving “fatal: Not a git repository” when attempting to remote add a Git repo
...nd then I did this:
echo 'ref: refs/heads/ML_#94_FILTER_TYPES_AND_SPECIAL_CHARS' > .git/HEAD
It worked.
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Get the index of the nth occurrence of a string?
...built-in method, what is the quickest way to get the n th occurrence of a string within a string?
10 Answers
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What is the difference between a reference type and value type in c#?
...gregated into "class, struct, enum, delegate, interface". int is a struct, string is a class, Action is a delegate, etc. Your list of "int, bool, float, class, interface, delegate" is a list containing difference kinds of things, in the same way that "10, int" is a list containing different kinds of...
Regex: matching up to the first occurrence of a character
...egular expression look only for matches starting from the beginning of the string. In this case, that would effectively be a no-op if you run the regular expression only once. If you want to look for multiple matches within a single string, the first ^ would have to go.
– Dan B...