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How does the HyperLogLog algorithm work?

...n be of different sizes. One element can be 1 another element "is this big string". So if you have a huge list (or a huge stream of elements) it will take a lot memory. Probabilistic Counting How can one get a reasonable estimate of a number of unique elements? Assume that you have a string of l...
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How to get result of console.trace() as string in javascript with chrome or firefox?

...ole.trace() outputs its result on console. I want to get the results as string and save them to a file. I don't define names for functions and I also can not get their names with callee.caller.name . ...
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Which letter of the English alphabet takes up most pixels?

... for(var i = capsIndex; i < capsIndex + 26; i++) { div.innerText = String.fromCharCode(i); var computedWidth = window.getComputedStyle(div, null).getPropertyValue("width"); if(highestWidth < parseFloat(computedWidth)) { highestWidth = parseFloat(computedWidth); ...
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What is the most efficient way to store a list in the Django models?

...key relationship to a Friends table? I understand that myFriends are just strings but I would think that a better design would be to create a Friend model and have MyClass contain a foreign key realtionship to the resulting table. ...
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What's the difference between [ and [[ in Bash? [duplicate]

...e. You no longer have to quote variables like mad because [[ handles empty strings and strings with whitespace more intuitively. For example, with [ you have to write if [ -f "$file" ] to correctly handle empty strings or file names with spaces in them. With [[ the quotes are unnecessary: if [[ ...
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How ViewBag in ASP.NET MVC works

... intrigues me, how does "Magic" properties such as ViewBag.Foo and magic strings ViewBag["Hello"] actually work? 7 Answ...
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Convert UTC date time to local date time

... Append 'UTC' to the string before converting it to a date in javascript: var date = new Date('6/29/2011 4:52:48 PM UTC'); date.toString() // "Wed Jun 29 2011 09:52:48 GMT-0700 (PDT)" ...
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How to update PATH variable permanently from Windows command line?

...rom the command line ( cmd.exe ) and then execute echo %PATH% I see this string added to the PATH. If I close and open the command line, that new string is not in PATH. ...
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How to use a variable for a key in a JavaScript object literal?

...l.org/ecma-262/5.1/#sec-11.1.5 PropertyName : IdentifierName StringLiteral NumericLiteral [...] The production PropertyName : IdentifierName is evaluated as follows: Return the String value containing the same sequence of characters as the IdentifierName. ...
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Format bytes to kilobytes, megabytes, gigabytes

...es($bytes, $force_unit = NULL, $format = NULL, $si = TRUE) { // Format string $format = ($format === NULL) ? '%01.2f %s' : (string) $format; // IEC prefixes (binary) if ($si == FALSE OR strpos($force_unit, 'i') !== FALSE) { $units = array('B', 'KiB', 'MiB', 'GiB', 'TiB',...