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Why does Math.round(0.49999999999999994) return 1?
...Java 7 no longer mandates this broken implementation.3
The problem
0.5+0.49999999999999994 is exactly 1 in double precision:
static void print(double d) {
System.out.printf("%016x\n", Double.doubleToLongBits(d));
}
public static void main(String args[]) {
double a = 0.5;
double b = 0...
What is the maximum length of data I can put in a BLOB column in MySQL?
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A BLOB can be 65535 bytes (64 KB) maximum.
If you need more consider using:
a MEDIUMBLOB for 16777215 bytes (16 MB)
a LONGBLOB for 4294967295 bytes (4 GB).
See Storage Requirements for String Types for more info.
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How to make Google Chrome JavaScript console persistent?
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If anyone's still looking for this, I'm on Chrome 15.0.874.58 beta-m and I have a checkbox in Developer Tools > Settings labelled "Console: Preserve log on navigation". Does the job nicely.
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Pandas get topmost n records within each group
... value
id
1 0 1 1
1 1 2
2 3 2 1
4 2 2
3 7 3 1
4 8 4 1
(Keep in mind that you might need to order/sort before, depending on your data)
EDIT: As mentioned by the questioner, use df.groupby('id').head(2).reset_index(drop=True) to remo...
iOS - How to set a UISwitch programmatically
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edited May 26 at 18:48
User that is not a user
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Git number of commits per author on all branches
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answered Mar 23 '12 at 12:48
ralphtheninjaralphtheninja
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How to send only one UDP packet with netcat?
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edited Jul 23 '19 at 20:04
Sean Bright
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ans...
Possible Loss of Fraction
... Ólafur WaageÓlafur Waage
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chai test array equality doesn't work as expected
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edited Dec 2 '14 at 13:54
answered Jul 8 '13 at 12:53
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What's the difference between F5 refresh and Shift+F5 in Google Chrome browser?
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edited Apr 18 '17 at 9:43
PhoneixS
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answered D...