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How to remove convexity defects in a Sudoku square?
...sk"}][[All,
2]];
largestComponent = Image[SortBy[components, First][[-1, 2]]]
By filling this image, I get a mask for the sudoku grid:
mask = FillingTransform[largestComponent]
Now, I can use a 2nd order derivative filter to find the vertical and horizontal lines in two separate images...
How to calculate “time ago” in Java?
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179
Take a look at the PrettyTime library.
It's quite simple to use:
import org.ocpsoft.prettyti...
How to calculate the number of occurrence of a given character in each row of a column of strings?
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13 Answers
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How do I know which version of Javascript I'm using?
I'm just reading this documentation about Javascript 1.2, but I'm wondering which version of Javascript is being used in the most popular browsers.
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Convert pandas dataframe to NumPy array
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15 Answers
15
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How do I create an empty array/matrix in NumPy?
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13 Answers
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How to read the output from git diff?
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Lets take a look at example advanced diff from git history (in commit 1088261f in git.git repository):
diff --git a/builtin-http-fetch.c b/http-fetch.c
similarity index 95%
rename from builtin-http-fetch.c
rename to http-fetch.c
index f3e63d7..e8f44ba 100644
--- a/builtin-http-fetch.c
+++ b/ht...
Find MongoDB records where array field is not empty
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11 Answers
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