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Pry: show me the stack
...personal_site/app/controllers/posts_controller.rb @ line 7 PostsController#index:
5: def index
6: @posts = Post.all
=> 7: binding.pry
8: end
[1] pry(#<PostsController>)> show-stack
Showing all accessible frames in stack (65 in total):
--
=> #0 index <PostsContr...
What happens when a duplicate key is put into a HashMap?
...value associated with the given key in the map (conceptually like an array indexing operation for primitive types).
The map simply drops its reference to the value. If nothing else holds a reference to the object, that object becomes eligible for garbage collection. Additionally, Java returns any...
Is it fine to have foreign key as primary key?
...concepts in a database and can easily be mixed just as easily as adding an index (which would be a third separate concept).
– blindguy
Jan 24 at 16:57
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What's the best Django search app? [closed]
... We found that Sphinx was the least resource-intensive and fastest way to index and search our documents and that django-sphinx was a nice wrapper on top of the sphinx client.
The group by aggregation is particularly nice, if for example you want to display how many documents with a certain tag or...
How can I move a single directory from a git repository to a new repository whilst maintaining the h
...wering @ilius's question too), you want something like git filter-branch --index-filter 'git rm -r --cached --ignore-unmatched foodir' -- --all
– Brian Campbell
Apr 24 '14 at 14:36
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How to split/partition a dataset into training and test datasets for, e.g., cross validation?
...ation import StratifiedKFold
skf = StratifiedKFold(y, n_folds=5)
for train_index, test_index in skf:
print("TRAIN:", train_index, "TEST:", test_index)
X_train, X_test = X[train_index], X[test_index]
y_train, y_test = y[train_index], y[test_index]
...
What is the motivation for bringing Symbols to ES6?
...
Most languages (all mainstream ones afaik) provide some mechanism, usually reflection, to get access to private anyway.
– Esailija
May 14 '14 at 10:58
...
Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
...lice is the fastest way. However, it is even faster if you add the 0 begin index.
myArray.slice(0);
is faster than
myArray.slice();
http://jsperf.com/cloning-arrays/3
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How do I convert dates in a Pandas data frame to a 'date' data type?
...trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_index,col_indexer] = value instead
– yoshiserry
Mar 14 '14 at 2:07
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How can bcrypt have built-in salts?
...$2a$10$vI8aWBnW3fID.ZQ4/zo1G.q1lRps.9cGLcZEiGDMVr5yUP1KUOYTa
This is actually three fields, delimited by "$":
2a identifies the bcrypt algorithm version that was used.
10 is the cost factor; 210 iterations of the key derivation function are used (which is not enough, by the way. I'd recommend a ...