symbols

I want to insert a char into a list. However, I want to merge this char with the last symbol in the list. With appends and cons the result is always two different symbols. Well, I want one merged symbol to be my result. Example: (XXXX 'a '5) ====> (a5) What I would like to have, instead of: (XXXX 'a '5) ====> (a 5) You cannot "merge symbols" in Lisp. First of all, 5 is not a symbol, but a number. If you want a symbol named "5" you have to type it as |5| (for example). If a function takes the symbol A and symbol |5| , and produces the symbol A5 , it has not merged symbols. It has created a new

I'm running rails3 with rails exception-notifier gem. When an exception occurs, and an email should be sent, I'm getting an exception from the ParameterFilter class. I've found the problem in the rails source, and am not sure the best way to proceed. The problem occurs in ActionDispatch::Http::ParameterFilter. In the compiled_filter method, an error occurs on line 38: key = key.dup when key is a symbol, because symbols are not duplicable. Here is the source: def compiled_filter ... elsif blocks.present? key = key.dup value = value.dup if value.duplicable? blocks.each { |b| b.call(key, value) }

I have two classes, Offering and Course. They are both in the same package and the same directory. Offering.java: package assignment02; public class Offering implements Comparable<Offering> { private Course course; private int CRN; private int semester; public Offering(Course course, int CRN, int semester) { this.course = course; this.CRN = CRN; this.semester = semester; } public int getNumCredits() { return course.getNumCredits; } public int getCRN() { return CRN; } public int getSemester() { return semester; } public int compareTo(Offering other) { if(other == null) return - 1; return

This seems to be one of those things that every talks about but no one defines...I can't seem to find any information on this topic. What is symbol resolution? This is the best thing I've found: http://docs.oracle.com/cd/E23824_01/html/819-0690/chapter2-90421.html#chapter2-93321 Does it have something to do with how your program is compiled? Well, now that you mention Unix's nm, I can pinpoint the symbol resolution. Executable files can make reference to entities which are not defined inside themselves. For instance, variables or procedures on shared libraries. Those entities are identified by

The code works when I used java.util.Arrays.sort(numbers); Am I doing something wrong? This seems weird to me. import java.util.Arrays.*; class Test { public static void main(String[] args) { double[] numbers = {6.0, 4.4, 1.9, 2.9, 3.4, 3.5}; char[] chars = {'a', 'A', '4', 'F', 'D', 'P'}; sort(numbers); System.out.println(binarySearch(numbers, 3)); } } (Error displayed in terminal) Test.java:8: error: cannot find symbol sort(numbers); ^ symbol: method sort(double[]) location: class Test Test.java:10: error: cannot find symbol System.out.println(binarySearch(numbers, 3)); ^ symbol: method

Hi I'm getting following error and so far not able to fix it. Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_GAI", referenced from: objc-class-ref in AppDelegate.o objc-class-ref in HomeViewController.o "_OBJC_CLASS_$_GAITrackedViewController", referenced from: _OBJC_CLASS_$_HomeViewController in HomeViewController.o "_OBJC_METACLASS_$_GAITrackedViewController", referenced from: _OBJC_METACLASS_$_HomeViewController in HomeViewController.o ld: symbol(s) not found for architecture x86_64 Any help would be appreciated. Thanks in advance ! Had same problem till I added the

I'm trying to take a string, and convert it into a variable name. I though (make-symbol) or (intern) would do this, but apparently it's not quite what I want, or I'm using it incorrectly. For example: > (setf (intern (string "foo")) 5) > foo 5 Here I would be trying to create a variable named 'foo' with a value of 5. Except, the above code gives me an error. What is the command I'm looking for? There are a number of things to consider here: SETF does not evaluate its first argument. It expects a symbol or a form that specifies a location to update. Use SET instead. Depending upon the vintage