Author: Luca Zanini

  • ìNames scores

    —

    by

    Luca Zanini
    in

    From the Project Euler Problem 22: Using […] a 46K text file containing over five-thousand first names, begin by sorting it into alphabetical order. Then working out the alphabetical value for each name, multiply this value by its alphabetical position in the list to obtain a name score. For example, when the list is sorted…

  • The Form Table and Form Layout Row controls of the Extension Library

    —

    by

    Luca Zanini
    in

    The Form Table and Form Layout Row controls allow you to easily implement a form with the fields and their labels. In this post I use these two controls to convert the form “Document” to xpage in a database that inherits from the template Doc Library – Notes & web (8.5).

  • Amicable numbers

    —

    by

    Luca Zanini
    in

    From the Project Euler Problem 21: Let d(n) be defined as the sum of proper divisors of n (numbers less than n which divide evenly into n). If d(a) = b and d(b) = a, where a ≠ b, then a and b are an amicable pair and each of a and b are called…

  • Factorial digit sum

    —

    by

    Luca Zanini
    in

    From the Project Euler Problem 20: n! means n * (n – 1) * … * 3 * 2 * 1 For example, 10! = 10 * 9 … * 3 * 2 * 1 = 3628800, and the sum of the digits in the number 10! is 3 + 6 + 2 + 8…

  • The Exception Unable to instantiate activity ComponentInfo

    —

    by

    Luca Zanini
    in

    If you have this error “Unable to instantiate activity ComponentInfo” in the LogCat of Android just you launch your app, first you have to check the file AndroidManifest.xml especially the code lines package=”[your package]” it is an attribute of the tag manifest and you insert a unique name for your app in java package style,…

  • ActionBar, Fragment and screen rotation

    —

    by

    Luca Zanini
    in

    In the post Tab Layout in Android with ActionBar and Fragment as dnoray wrote in his comment, there is a problem: when you rotate the screen (ctrl + F11 in the emulator) there is an overlap of the two fragments as seen in the figure. For a further discussion on this topic you can read…

  • Counting Sundays

    —

    by

    Luca Zanini
    in

    From the Project Euler Problem 19: You are given the following information, but you may prefer to do some research for yourself. 1 Jan 1900 was a Monday. Thirty days has September, April, June and November. All the rest have thirty-one, Saving February alone, Which has twenty-eight, rain or shine. And on leap years, twenty-nine.…

  • Maximum path sum

    —

    by

    Luca Zanini
    in

    From the Project Euler Problem 18: By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum total from top to bottom is 23. 3 7 4 2 4 6 8 5 9 3 That is, 3 + 7 + 4 + 9 = 23. Find…

  • Number letter counts

    —

    by

    Luca Zanini
    in

    From the Project Euler Problem 17: If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + 4 + 4 = 19 letters used in total. If all the numbers from 1 to 1000 (one thousand) inclusive were written out in…

  • Hidden fields in a lotus form open with a browser

    —

    by

    Luca Zanini
    in

    In a lotus form you can hide the fields enabling the check box “Hide paragraph from Web browser” in the window of the properties of the field but in this way the field is not generated as a hidden field, i.e. a html tag input with attribute type=”hidden” is not generated and you can’t access…