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Boolean Field in Oracle
...nd other programming environments,
it's better to select 0 for false and 1 for true so it can work
correctly with the getBoolean and setBoolean functions.
Basically they advocate method number 2, for efficiency's sake, using
values of 0/1 (because of interoperability with JDBC's getBoolean(...
Canvas width and height in HTML5
...sByTagName('canvas')[0];
var ctx = c.getContext('2d');
ctx.lineWidth = 1;
ctx.strokeStyle = '#f00';
ctx.fillStyle = '#eff';
ctx.fillRect( 10.5, 10.5, 20, 20 );
ctx.strokeRect( 10.5, 10.5, 20, 20 );
ctx.fillRect( 40, 10.5, 20, 20 );
ctx.strokeRect( 40, 10.5, 20, 20 );
ctx.fillRect( ...
Why modelVersion of pom.xml is necessary and always set to 4.0.0?
... A POM has to comply with a model. Let's say Maven 4 comes up with model 4.1. If you write your pom to comply with 4.1, it wouldn't be compatible with Maven 3 and model 4.0.0.
It's defined as a mandatory, possibly to enforce a specific XML model in case new models are defined.
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How are feature_importances in RandomForestClassifier determined?
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158
There are indeed several ways to get feature "importances". As often, there is no strict conse...
Replacing NAs with latest non-NA value
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18 Answers
18
Active
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C++: Rounding up to the nearest multiple of a number
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31 Answers
31
Active
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what does -webkit-transform: translate3d(0,0,0); exactly do? Apply to body?
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109
-webkit-transform: translate3d(0,0,0); makes some devices run their hardware acceleration.
A ...
Remove duplicated rows using dplyr
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139
Note: dplyr now contains the distinct function for this purpose.
Original answer below:
li...
leading zeros in rails
...min , both integers in my application. For hr field, if the user enters "1" I would like Rails to automatically pad it to "01" before saving it to the database. Also for the min field if the user enter "0" it should put in as "00".
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