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When saving, how can you check if a field has changed?
...value went from the base
new._loaded_remote_image = values[field_names.index('remote_image')]
return new
def save(self, force_insert=False, force_update=False, using=None,
update_fields=None):
if (self._state.adding and self.remote_image) or \
(not self._state.adding an...
Routes with Dash `-` Instead of Underscore `_` in Ruby on Rails
... patch no longer works in Rails 5. This will dasherize everything except #index and #create, which will remain as underscore and create nasty bugs. If anyone has an updated script for Rails 5, it would be much appreciated.
– Kelsey Hannan
Jan 11 '18 at 3:13
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Java LinkedHashMap get first or last entry
...ert entry(key, value) as a first entry in my linked map; OR something like index based insertion. is that possible with Apache collections?
– Kanagavelu Sugumar
Jun 20 '14 at 6:40
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git-checkout older revision of a file under a new name
...n) is a special case of the syntax described next: content recorded in the index at the given path.
A path starting with ./ or ../ is relative to the current working directory. The given path will be converted to be relative to the working tree’s root directory. This is most useful to ad...
PostgreSQL wildcard LIKE for any of a list of words
...now off the top of my head but Erwin Brandstetter might and adding trigram indexes might help.
– mu is too short
Sep 7 '17 at 6:18
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Why doesn't Dictionary have AddRange?
...ap each Add in a try...catch and catch the duplicates that way; or use the indexer and overwrite the first value with the later value; or preemptively check using ContainsKey before attempting to Add, thus preserving the original value. If the framework had an AddRange or AddMultiple method, the onl...
In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?
...k correctly. Here's a good link to more symbols: danshort.com/HTMLentities/index.php?w=dingb
– Nathan Prather
Aug 26 '12 at 15:25
1
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Difference between Document-based and Key/Value-based databases?
...ds more complex queries, your application will have to create and maintain indexes in order to access the desired data.
Document databases support queries by key and map-reduce functions as well, but also allow you to do basic queries by value, such as "Give me all users with more than 10 posts". D...
Search for “does-not-contain” on a DataFrame in pandas
...sing the command recommended by Andy above. An example:
df = pd.DataFrame(index = [0, 1, 2], columns=['first', 'second', 'third'])
df.ix[:, 'first'] = 'myword'
df.ix[0, 'second'] = 'myword'
df.ix[2, 'second'] = 'myword'
df.ix[1, 'third'] = 'myword'
df
first second third
0 myword myword ...
What is HEAD in Git?
... This one helped me, hope it helps: marklodato.github.com/visual-git-guide/index-en.html
– raphael
Jan 4 '12 at 18:49
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