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Compare double to zero using epsilon
... greater than 1:
1.0000 00000000 00000000 00000000 00000000 00000000 00000001 × 2^0 = 1 + 2^-52
Therefore:
epsilon = (1 + 2^-52) - 1 = 2^-52
Are there any numbers between 0 and epsilon? Plenty... E.g. the minimal positive representable (normal) number is:
1.0000 00000000 00000000 00000000 00...
How do you convert epoch time in C#?
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Unix Time is usually expressed in seconds, but 0.001 is a valid number of seconds (= 1 ms). When in doubt, just use the maximum possible precision.
– Scott
Jul 10 '17 at 16:56
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Formatting floats without trailing zeros
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The only problem with that is '%.2f' % -0.0001 will leave you with -0.00 and ultimately -0.
– Kos
Dec 7 '12 at 13:14
3
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How to get execution time in rails console?
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With benchmark-ips gem:
2.3.0 :001 > require 'benchmark/ips'
=> true
2.3.0 :002 > Benchmark.ips do |x|
2.3.0 :003 > x.report("add: ") { 1+2 }
2.3.0 :004?> x.report("div: ") { 1/2 }
2.3.0 :005?> x.report("iis: ") { 1/2.0...
How to generate a git patch for a specific commit?
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Adam Liss
44.1k1111 gold badges100100 silver badges140140 bronze badges
answered Jul 12 '11 at 0:43
manojldsmanojlds
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Cancel/kill window.setTimeout() before it happens
...ot only for the OP but for future visitors to SO.
– B001ᛦ
Aug 23 '16 at 13:10
4
+1 just because...
Python unit test with base and sub class
...---------------------------------------------------------
Ran 4 tests in 0.001s
OK
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Using 'return' in a Ruby block
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Simply use next in this context:
$ irb
irb(main):001:0> def thing(*args, &block)
irb(main):002:1> value = block.call
irb(main):003:1> puts "value=#{value}"
irb(main):004:1> end
=> nil
irb(main):005:0>
irb(main):006:0* thing {
irb(main):007:1* ret...
Does Ruby regular expression have a not match operator like “!~” in Perl?
... from the documentation page of Regexp. Nevertheless, it works:
irb(main):001:0> 'x' !~ /x/
=> false
irb(main):002:0> 'x' !~ /y/
=> true
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Truncate Two decimal places without rounding
....AreEqual(-1.12m, -1.1254m.TruncateEx(2));
Assert.AreEqual(0m, 0.0001m.TruncateEx(3));
Assert.AreEqual(0m, -0.0001m.TruncateEx(3));
Assert.AreEqual(0m, -0.0000m.TruncateEx(3));
Assert.AreEqual(0m, 0.0000m.TruncateEx(3));
Assert.AreEqual(1.1m, 1.12m. Truncate...