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Test if string is a number in Ruby on Rails
... (±5.5%) i/s - 5788976 in 5.035311s
require 'benchmark/ips'
int = '220000'
bad_int = '22.to.2'
Benchmark.ips do |x|
x.report('cast') do
Integer(int) rescue false
end
x.report('cast fail') do
Integer(bad_int) rescue false
end
x.report('to_s') do
int.to_i.to_s == int
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Re-ordering columns in pandas dataframe based on column name [duplicate]
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edited Dec 18 '18 at 22:57
gcamargo
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answere...
BroadcastReceiver with multiple filters or multiple BroadcastReceivers?
...strings.
– waqaslam
May 9 '13 at 10:22
3
I don't understand all the upvotes for this answer. For ...
Adding a new array element to a JSON object
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edited Oct 24 '19 at 10:22
João Tiago
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answered Mar 10 '16 at 7:22
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Rails filtering array of objects by attribute value
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answered Apr 9 '12 at 10:22
Soundar RathinasamySoundar Rathinasamy
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Set attribute without value
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22
The accepted answer doesn't create a name-only attribute anymore (as of September 2017).
You ...
How is a CRC32 checksum calculated?
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The polynomial for CRC32 is:
x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1
Wikipedia
CRC calculation
Or in hex and binary:
0x 01 04 C1 1D B7
1 0000 0100 1100 0001 0001 1101 1011 0111
The highest term (x32) is usually not explic...
How do you create a yes/no boolean field in SQL server?
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answered Nov 22 '09 at 0:18
GuffaGuffa
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Finding duplicates in O(n) time and O(1) space
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– j_random_hacker
Apr 22 '11 at 0:38
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show 17 more comments
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What does `someObject.new` do in Java?
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edited Jul 17 '13 at 22:15
JayQuerie.com
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