numbers

问题 im searching for a solution for my Haskell class. I have a list of numbers and i need to return SUM for every part of list. Parts are divided by 0. I need to use FOLDL function. Example: initial list: [1,2,3,0,3,4,0,5,2,1] sublist [[1,2,3],[3,4],[5,2,1]] result [6,7,7] I have a function for finding 0 in initial list: findPos list = [index+1 | (index, e) <- zip [0..] list, e == 0] (returns [4,6] for initial list from example) and function for making SUM with FOLDL: sumList list = foldl (+) 0

问题 I can even calculate ( expt 32768 32768 ) and I got: 476170470581645852036305042887575891541065808607552399123930385521914333389668342420684974786564569494856176035326322058077805659331026192708460314150258592864177116725943603718461857357598351152301645904403697613233287231227125684710820209725157101726931323469678542580656697935045997268352998638215525166389437335543602135433229604645318478604952148193555853611059596230656 回答1: Lisp automatically switches math to use a bignum package when

问题 After a very thorough read of the Python's decimal module documentation, I still find myself puzzled by what happens when I divide a decimal. In Python 2.4.6 (makes sense): >>> import decimal >>> decimal.Decimal(1000) / 10 Decimal("100") In Python 2.5.6, Python 2.6.7, and Python 2.7.2 (puzzling): >>> import decimal >>> decimal.Decimal(1000) / 10 Decimal('0.00000-6930898827444486144') More confusing yet, that result doesn't even appear to be valid: >>> decimal.Decimal('0.00000

问题 I want to compare two entries in a UITextField giving a number to each letter and then compare the results of the addition of the letters from both fields. Example: a=1 b=2 c=3 d=4 e=5 f=6 textfield1= cae textfield2= fca Result is: textfield1=9 and textfield2=10 回答1: You could use the unicode scalar representation of each character (look up ASCII tables) and sum these shifted by -96 (such that a -> 1 , b -> 2 and so on). In the following, upper case letters will generate the same number value

问题 Using Node.js, I'm evaluating the expression: 0 < Number.MIN_VALUE To my surprise, this returns true . Why is that? And: How can I get the smallest number available for which the comparison works as expected? 回答1: Number.MIN_VALUE is 5e-324 , i.e. the smallest positive number that can be represented within float precision, i.e. that's as close as you can get to zero. It defines the best resolution floats give you. Now the overall smallest value is Number.NEGATIVE_INFINITY although that's not

问题 Using Node.js, I'm evaluating the expression: 0 < Number.MIN_VALUE To my surprise, this returns true . Why is that? And: How can I get the smallest number available for which the comparison works as expected? 回答1: Number.MIN_VALUE is 5e-324 , i.e. the smallest positive number that can be represented within float precision, i.e. that's as close as you can get to zero. It defines the best resolution floats give you. Now the overall smallest value is Number.NEGATIVE_INFINITY although that's not

问题 I have an ordered list, but I want to number is manually in a separate span tag than use the default list-style: decimal; <ol> <li><span>1</span> item 1</li> <li><span>2</span> item 2</li> </ol> How can I achieve this using jQuery? Many thanks! 回答1: $(function() { $("ol > li").each(function(i, n) { $(this).prepend("<span>" + (i+1) + "</span> "); }); }); You'll need to disable the standard markers too: ol { list-style-type: none; } Adjust as required. 来源： https://stackoverflow.com/questions

问题 I have 2 range of numbers: $startTime to $endTime $offerStartTime to $offerEndTime Each of the above variables are integers. I want to see if the range offerStartTime to offerEndTime falls in the range startTime and endTime . For example, if the startTime and endTime range was: 10 to 20, then the following example ranges would return true : offerStartTime: 5, offerEndTime: 11 offerStartTime: 5, offerEndTime: 100 offerStartTime: 10, offerEndTime: 15 offerStartTime: 10, offerEndTime: 100

问题 I would like to set a minimum and maximum allowed number to be entered in text input I know I can do this with range input but will it still have the max and min when used in non compatible browsers? if not could you please point me in the right direction, thanks for reading. 回答1: Use jquery validator plugin. It has a nice set of features, and min max validation too. But checking values on server side is a must too. Here is an examples for min and max. 回答2: No; you can never rely on the

问题 I have a float number such as x=23392342.1 I would like to convert it to a string with engineering notation (with metric prefix) http://en.wikipedia.org/wiki/Engineering_notation http://en.wikipedia.org/wiki/Metric_prefix So in my example 23392342.1 = 23.3923421E6 = 23.3923421 M (mega) I would like to display 23.3923421 M 回答1: Here is a function inspired from Formatting a number with a metric prefix? metric.py #!/usr/bin/env python # -*- coding: utf-8 -*- import math def to_si(d, sep=' '): ""