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Get all keys of an NSDictionary as an NSArray
Is it possible to get all the keys from a specific NSDictionary as a seperate NSArray ?
3 Answers
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Set every cell in matrix to 0 if that row or column contains a 0
Given a NxN matrix with 0s and 1s. Set every row that contains a 0 to all 0 s and set every column that contains a 0 to all 0 s.
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How does this CSS produce a circle?
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Let's reformulate that into two questions:
Where do width and height actually apply?
Let's have a look at the areas of a typical box (source):
The height and width apply only on content, if the correct box model is being used (no quirks mode, no old Internet Explorer).
Where does border-radi...
Creating a CSS3 box-shadow on all sides but one
...single shadow (see bottom horizontal line) going up, shading the bottom of all tabs except for the open one.
9 Answers
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How to use Active Support core extensions
I have Active Support 3.0.3 installed and Rails 3.0.3 with Ruby 1.8.7.
5 Answers
5
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Search an Oracle database for tables with specific column names?
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To find all tables with a particular column:
select owner, table_name from all_tab_columns where column_name = 'ID';
To find tables that have any or all of the 4 columns:
select owner, table_name, column_name
from all_tab_columns...
What is the role of the bias in neural networks? [closed]
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I think that biases are almost always helpful. In effect, a bias value allows you to shift the activation function to the left or right, which may be critical for successful learning.
It might help to look at a simple example. Consider this 1-input, 1-output network that has no bias:
The ou...
Check if all values of array are equal
I need to find arrays where all values are equal. What's the fastest way to do this? Should I loop through it and just compare values?
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Are HTTP cookies port specific?
...e network attacker. Similarly, cookies for a given host are shared across all the ports on that host, even though the usual "same-origin policy" used by web browsers isolates content retrieved via different ports.
And also:
8.5. Weak Confidentiality
Cookies do not provide isolation by p...
List all of the possible goals in Maven 2?
...d of the following phases:
validate: validate the project is correct and all necessary information is available.
compile: compile the source code of the project.
test: test the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or depl...