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Concept behind these four lines of tricky C code

... The number 7709179928849219.0 has the following binary representation as a 64-bit double: 01000011 00111011 01100011 01110101 01010011 00101011 00101011 01000011 +^^^^^^^ ^^^^---- -------- -------- -------- -------- -------- -------- +...
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make arrayList.toArray() return more specific types

...ist = new ArrayList<String>(); String[] a = list.toArray(new String[0]); Before Java6 it was recommended to write: String[] a = list.toArray(new String[list.size()]); because the internal implementation would realloc a properly sized array anyway so you were better doing it upfront. Sinc...
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Hex representation of a color with alpha channel?

...se rgba() functional notation with decimals or percentages, e.g. rgba(255, 0, 0, 0.5) would be 50% transparent red. RGB channels are 0-255 or 0%-100%, alpha is 0-1. In CSS 4*, you can specify the alpha channel using the 7th and 8th characters of an 8 digit hex colour, or 4th character of a 4 digit ...
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How to convert number to words in java

... 107 Here is the code, I don't think there is any method in SE. It basically converts number to str...
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What is the difference between NULL, '\0' and 0?

...ear to be differences between various values of zero -- NULL , NUL and 0 . 11 Answers ...
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Convert unix time to readable date in pandas dataframe

... 230 These appear to be seconds since epoch. In [20]: df = DataFrame(data['values']) In [21]: df.co...
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AddBusinessDays and GetBusinessDays

...atic DateTime AddBusinessDays(DateTime date, int days) { if (days < 0) { throw new ArgumentException("days cannot be negative", "days"); } if (days == 0) return date; if (date.DayOfWeek == DayOfWeek.Saturday) { date = date.AddDays(2); days -= 1; ...
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Number of lines in a file in Java

... 240 This is the fastest version I have found so far, about 6 times faster than readLines. On a 150MB...
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Regex to replace everything except numbers and a decimal point

... Use this: document.getElementById(target).value = newVal.replace(/[^0-9.]/g, ""); share | improve this answer | follow | ...
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What is the GAC in .NET?

...s\assembly C:\Windows\assembly>dir Directory of C:\Windows\assembly 07/20/2009 02:18 PM <DIR> GAC 06/17/2009 04:22 PM <DIR> GAC_32 06/17/2009 04:22 PM <DIR> GAC_64 06/17/2009 04:22 PM <DIR> GAC_MSIL ...snip... ...