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Performance - Date.now() vs Date.getTime()
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answered Sep 20 '12 at 17:04
PointyPointy
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Cosmic Rays: what is the probability they will affect a program?
... 10-15 per byte per second. If your program runs for 1 minute and occupies 20 MB of RAM, then the failure probability would be
60 × 20 × 1024²
1 - (1 - 1.4e-15) = 1.8e-6 a.k.a. "5 nines"
Error checking can help to reduce the aftermath of failure. Also, because...
HTTP URL Address Encoding in Java
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edited Nov 15 '17 at 20:39
River
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answered A...
Naming convention for utility classes in Java
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answered Apr 20 '10 at 17:01
JayJay
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Check if an element is a child of a parent
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answered Sep 20 '10 at 17:04
user113716user113716
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Fastest way to replace NAs in a large data.table
...e a large data.table , with many missing values scattered throughout its ~200k rows and 200 columns. I would like to re code those NA values to zeros as efficiently as possible.
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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
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answered Sep 20 '08 at 23:09
1800 INFORMATION1800 INFORMATION
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How expensive is RTTI?
...able in that :) )
– Billy ONeal
Feb 20 '14 at 18:56
4
@Deduplicator: And yet, when I turn off RTT...
How do you delete an ActiveRecord object?
... like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent association options.
User.delete_all(condition:...
Sorting arrays in NumPy by column
...mn of a.
– Steve Tjoa
Apr 17 '14 at 20:49
61
If you want the reverse sort, modify this to be a[a[...