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JetBrains / IntelliJ keyboard shortcut to collapse all methods
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441
You may take a look at intellij code folding shortcuts.
For Windows/Linux do: Ctrl+Shift+-
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How to check if a Unix .tar.gz file is a valid file without uncompressing?
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answered Jan 4 '10 at 19:51
Rob WellsRob Wells
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Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
...imes and observe performance on the validation data, then do the same with 40%, 60%, 80%. You should see both greater performance with more data, but also lower variance across the different random samples
To get a handle on variance due to the size of test data, perform the same procedure in revers...
How do I generate random numbers in Dart?
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Seth LaddSeth Ladd
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How to calculate the angle between a line and the horizontal axis?
...ative.
The sign of deltaY will tell you whether the sine described in step 4 is positive or negative.
The signs of deltaX and deltaY will tell you which quadrant the angle is in, in relation to the positive X axis at P1:
+deltaX, +deltaY: 0 to 90 degrees.
-deltaX, +deltaY: 90 to 180 degrees.
-delt...
How should I validate an e-mail address?
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48
Don't use a reg-ex.
Apparently the following is a reg-ex that correctly validates most e-mai...
PHP array delete by value (not key)
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edited Oct 18 '17 at 10:42
Orwellophile
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answer...
MySQL: How to copy rows, but change a few fields?
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edited May 6 '10 at 17:44
answered May 6 '10 at 17:35
dc...