base

问题 I'm trying to convert an integer to a string right now, and I'm having a problem. I've gotten the code written and working for the most part, but it has a small flaw when carrying to the next place. It's hard to describe, so I'll give you an example. Using base 26 with a character set consisting of the lowercase alphabet: 0 = "a" 1 = "b" 2 = "c" ... 25 = "z" 26 = "ba" (This should equal "aa") It seems to skip the character at the zero place in the character set in certain situations. The

问题 Base64 encodes three 8-bit characters onto onto four (base-64) 6-bit "characters". Base64 is efficient because it uses a base (64) and exponent (4) that happens to perfectly match a base-10 exponent of 2 (24): 3x8=4x6=24 and 2 24 =64 4 =16777216. It appears that there are no base/exponent combinations that result in values that exactly match base-10 exponents of 2 (specifically 2 n for any 0< n <256), except for base32, base64 and base128 (along with base4, base8, base16, base256, base512,

问题 Here is my question: #data 1: lab1 <- 1:10 group <- rep(1:3, each = length (lab1)) label <- rep(lab1, 3) avar <- rep(c(0, 1, 4, 5, 6, 8, 10, 11, 12, 13), 3) myd <- data.frame (group, label, avar) # data 2 fillcol <- rep(rnorm(length(lab1)-1, 0.5, 0.2), 3) group1 <- rep(1:3, each = length(fillcol)/3) # this variable will be used to fill color in bars filld <- data.frame(group1, fillcol) # now plotting par(mfrow = c(3, 1)) par(mar = c(2.5, 1, 2.5, 1)) #plot1 myd1 <- myd[myd$group ==1,] filld1 <

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: How to use JavaScript variable in an HTML link The website that I am working on has a <base> tag point to a pre-established URL. What I would like to do is get around the <base> tag by using the trueURL bellow to find the url of the webpage. I need this variable because i would like to construct some internal anchors that will point to different parts of the webpage. The issue that im having is that i don't know

问题 How to from a JavaScript String, assuming that it will be converted to base 2 number representation, get length of it? var a = "27253612834651292817068063108051952822914696443427141008555142123316682144932254071632833688593262045689493008241655341783955326980297437493219806268065150183246111733458990008880411449482143090406377611761078341580375284217607011541826787677233082585754389591236816422975207551625801435043443350389601614965"; npm packages jsbn dont have it and big-integer returns in

问题 I have a base class of cars and a load function, if I have a derived class, can I use the load function from the base class and add extra data members such as engine size for sports cars to be loaded from a file. Below is my function definition. void Car::Load(ifstream& carFile) { carFile >> CarName >> Age >> Colour >> Price; } 回答1: yes you can : class Car{ public: virtual void Load(ifstream& carFile); } it is important that the Load method is virtual. class SportsCar : public Car{ public:

问题 I have a javascript code: var c = 267414715; var d = c ^ ("0x81BE16CD"); Result is -1907459466 http://jsfiddle.net/4N3JY/1/ I can't seem to get a PHP equivalent. Have tried the following: <?php $c=267414715; $d=$c ^ hexdec("0x81BE16CD"); echo "With hexdec: $d\n"; $d=$c ^ base_convert("0x81BE16CD", 16, 2); echo "With base_convert(2): $d\n"; $d=$c ^ base_convert("0x81BE16CD", 16, 10); echo "With base_convert(10): $d\n"; ?> Output: With hexdec: 2387507830 With base_convert(2):

问题 I am trying to create a scene or state manager which stores a Dictionary for each state as a way to load or change the state of the program (for example, a Main Menu state and a Game state). I have a bunch of derived classes of base class State that have variables that are not included in the base State class. Am I able to safely store them in this Dictionary? Will I have any data loss? If this doesn't work, what are alternative methods to achieve my goal? 回答1: This seems like something you

问题 I would like to know how to define a new numerical base in Python. For example: base dimension = 4 Charset = 'u', '$', '6', '}' (from the least important to the most) I would like to know how to create and handle it, to be able to do simple arithmetic like: $} + 6u * 6 = $$} 7 + 8 * 2 = 23 I know I could use replace to replace u -> 0 , $ -> 1 and so on, and use the int() function. However int() is not defined for base > 36 , and I will have to handle these cases. I know I could make my own

问题 I've got to write a single-input module that can convert decimals to Bukiyip (some ancient language with a counting base of 3 or 4). For the purpose of the assignment, we only need to work with base 3. I've written some code that does this, but it returns my Bukiyip number with quotes, leaving me with an answer such as '110' for 12. Please help me understand how to work around this? I'm new to Python and keen to learn so explanations will be really appreciated. def bukiyip_to_decimal(num):