Because of left-to-right associativity of < operator the expression condition (0.0 < a < 1.0) means ((0.0 < a) < 1.0) == 1 < 1.0 or 0 < 1.0 depending on value of a. So no, its not identical to if (0.0 < a && a < 1.0) (perhaps you might confusing from Python compassion … Read more
you could add the code below to you program and it will work. var split; // Avoid running twice; that would break the `nativeSplit` reference split = split || function (undef) { var nativeSplit = String.prototype.split, compliantExecNpcg = /()??/.exec(“”)[1] === undef, // NPCG: nonparticipating capturing group self; self = function (str, separator, limit) { // … Read more
If you’re “academically interested”, you want to learn about how to write a parser with operator precedence. Simple Top-Down Parsing in Python is a nice article that builds an example parser to do exactly what you want to do: Evaluate mathematical expressions. I can highly recommend having a go at writing your own first parser … Read more
The JPA spec (Version 2.0, 2.1 and 2.2 at least) doesn’t allow the use of collections as parameters in constructor expressions. Section 4.8 defines a constructor expression like this: constructor_expression ::= NEW constructor_name ( constructor_item {, constructor_item}* ) constructor_item ::= single_valued_path_expression | scalar_expression | aggregate_expression | identification_variable A single_valued_path_expression is what it sounds like – … Read more
In simple terms, if you mix types of the same rank (in the sequence of int, long int, long long int), the unsigned type “wins” and the calculations are performed within that unsigned type. The result is of the same unsigned type. If you mix types of different rank, the higher-ranked type “wins”, if it … Read more
So logically what we want to be able to do is create a new lambda in which it has a parameter of the input to the first function, and a body that calls the first function with that parameter and then passes the result as the parameter to the second function, and then returns that. … Read more
I tried to write the most compact C code for this bool expression evaluation problem. Here is my final code: EDIT: deleted Here is the added negation handling: EDIT: test code added char *eval( char *expr, int *res ){ enum { LEFT, OP1, MID, OP2, RIGHT } state = LEFT; enum { AND, OR } … Read more
x => x.DoSomething In order to make this compilable I see only two ways: Go non-generic way and specify it’s parameter as Action<string, string> Specify Action<string, string> as your target delegate type by yourself: GetMethodInfo<IMyInteface>(x => new Action<string,string>(x.DoSomething)) if you are ok to go with second one, which allows you to omit arguments then you … Read more
You can use it as a sort of assertion that an expression has arithmetic type: #define CHECK_ARITHMETIC(x) (+(x)) This will generate a compile-time error if x evaluates to (say) a pointer. That is about the only practical use I can think of.
If brackets are always balanced correctly and if they are never nested, then you can do it: result = subject.replace(/\s+(?=[^[\]]*\])/g, “”); This replaces whitespace characters if and only if there is a ] character ahead in the string with no intervening [ or ] characters. Explanation: \s+ # Match whitespace characters (?= # if it’s … Read more