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Advantages of Antlr (versus say, lex/yacc/bison) [closed]
...as-is. To use ANTLR (or any other LL parser generator), you would need to convert this grammar to something that is not left-recursive. However, Bison has no problem with grammars of this form. You would need to declare '+' and '-' as left-associative operators, but that is not strictly required ...
JavaScript Date Object Comparison
...n the examples, is always dealing with operands of the same type, @RobG is converting the values explicitly to Number (example 1 and 3) or in the example 2, we know that Date.prototype.getTime will always return a Number...
– Christian C. Salvadó
Sep 30 '11 at...
Using ECMAScript 6
...s)
Using Babel in your development pipeline will automatically transpile (convert) your JavaScript to be cross-browser compatible. Or, if you're using TypeScript, you can rest easy; your code is already getting transpiled.
Don't want to setup a transpiler (such as Babel/Typescript), or do yo...
Providing a default value for an Optional in Swift?
...e if this does not match the Optional and the Optional is non-nil:
let x: Int?
let y = x.getOrElse(1.414) // y inferred as Double, assigned 1.414
let a: Int? = 5
let b: Double = a.getOrElse(3.14) // Runtime failure casting 5 to Double
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What is the difference between Reader and InputStream?
... text, this is the stream to use.
You can wrap an InputStream and turn it into a Reader by using the InputStreamReader class.
Reader reader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
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How best to determine if an argument is not sent to the JavaScript function
...efault value. The second method will default all but the first (as JS will convert undefined, null, 0, and "" into the boolean false. And if you were to use Tom's method, only the fourth test will use the default!
Which method you choose really depends on your intended behavior. If values other tha...
Why does the expression 0 < 0 == 0 return False in Python?
Looking into Queue.py in Python 2.6, I found this construct that I found a bit strange:
9 Answers
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JOIN two SELECT statement results
...record is a separate task, with deadlines (and a PALT , which is just an INT of days from start to deadline. Age is also an INT number of days.)
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How to use npm with node.exe?
...ack - module bundler, package node-style modules for browser usage
babel - convert modern JS (ES2015+) syntax for your deployment environment.
If you build it...
shelljs - shell utilities for node scripts,. I used to use gulp/grunt, but these days will have a scripts directory that's referenced ...
Any reason to prefer getClass() over instanceof when generating .equals()?
...not be considered meaningful beyond the fact that the class in question is convertible to the base class, the return from getClass() should be considered like any other property which must match for instances to be equal.
– supercat
Apr 16 '14 at 16:41
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