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What's the best practice for primary keys in tables?
...ary keys will be foreign keys in another table as well as used in multiple indexes. The smaller your key, the smaller the index, the less pages in the cache you will use.
Primary keys should never change. Updating a primary key should always be out of the question. This is because it is most likely ...
String slugification in Python
...fy import slugify
txt = "This is a test ---"
r = slugify(txt)
self.assertEquals(r, "this-is-a-test")
txt = "This -- is a ## test ---"
r = slugify(txt)
self.assertEquals(r, "this-is-a-test")
txt = 'C\'est déjà l\'été.'
r = slugify(txt)
self.assertEquals(r, "cest-deja-lete")
txt = 'Nín hǎo. ...
java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
...le.com/p/hamcrest/downloads/detail?name=hamcrest-all-1.3.jar&can=2&q=
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REST APIs: custom HTTP headers vs URL parameters
When do you use custom HTTP headers in the request part of a REST API ?
8 Answers
8
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How to get the Full file path from URI
...i, projection, selection, selectionArgs, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if (cursor.moveToFirst()) {
return cursor.getString(column_index);
}
} catch (Exception e) {
...
Git submodule head 'reference is not a tree' error
...s commit that modified the submodule and then reseting the super-project's index to refer to a different submodule commit.
Inside, Out
If you already know which commit you want the submodule to use, cd to the submodule, check out the commit you want, then git add and git commit it back in the supe...
Linux command: How to 'find' only text files?
...ay to use find to find only non-binary files:
find . -type f -exec grep -Iq . {} \; -print
The -I option to grep tells it to immediately ignore binary files and the . option along with the -q will make it immediately match text files so it goes very fast. You can change the -print to a -print0 fo...
Removing nan values from an array
... everywhere that x is a valid number.
Lastly we use this logical array to index into the original array x, to retrieve just the non-NaN values.
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How can I use optional parameters in a T-SQL stored procedure?
...fference, can have massive performance implications. The key is to use an index, ignore compact code, ignore worrying about repeating code, you must make a good query execution plan (use an index).
Read this and consider all the methods. Your best method will depend on your parameters, your data,...
What is the --save option for npm install?
...
You can also use -S, -D or -P which are equivalent of saving the package to an app dependency, a dev dependency or prod dependency. See more NPM shortcuts below:
-v: --version
-h, -?, --help, -H: --usage
-s, --silent: --loglevel silent
-q, --quiet: --loglevel warn
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