From The Open Group: These strings have the form name=value; names shall not contain the character ‘=’. For values to be portable across systems conforming to IEEE Std 1003.1-2001, the value shall be composed of characters from the portable character set (except NUL and as indicated below). So names may contain any character except = … Read more
why is there two correct ways of specifying const data and in what situation would you prefer or need one over the other if any? Essentially, the reason that the position of const within specifiers prior to an asterisk does not matter is that the C grammar was defined that way by Kernighan and Ritchie. … Read more
There is perfect logic to the Parentheses Rule in VB(A), and it goes like this. If a procedure (function or sub) is called with arguments, and the call is on a line with other statements or keywords, the arguments must be enclosed in parentheses. This to distinguish the arguments belonging to the procedure call from … Read more
This works correctly: var deep_value = function(obj, path){ for (var i=0, path=path.split(‘.’), len=path.length; i<len; i++){ obj = obj[path[i]]; }; return obj; }; Here is the proof / demo: jsfiddle.net/tadeck/5Pt2q/13/ EDIT: I have removed redundant variables, shortened the code.
There is no semantic difference in the generic constraint language between whether a class ‘implements’ or ‘extends’. The constraint possibilities are ‘extends’ and ‘super’ – that is, is this class to operate with assignable to that other one (extends), or is this class assignable from that one (super).
var intvalue = Math.floor( floatvalue ); var intvalue = Math.ceil( floatvalue ); var intvalue = Math.round( floatvalue ); // `Math.trunc` was added in ECMAScript 6 var intvalue = Math.trunc( floatvalue ); Math object reference Examples Positive // value=x // x=5 5<x<5.5 5.5<=x<6 Math.floor(value) // 5 5 5 Math.ceil(value) // 5 6 6 Math.round(value) // 5 … Read more
To my understanding, assignment s = “Hello”; should only cause “Hello” to be assigned to s, but the operation shouldn’t return any value. Your understanding is 100% incorrect. Can you explain why you believe this false thing? What is the reasoning behind allowing assignment statements to return a value? First off, assignment statements do not … Read more
Python actually applies comparison operator chaining here. The expression is translated to (1 in [1, 0]) and ([1, 0] == True) which is obviously False. This also happens for expressions like a < b < c which translate to (a < b) and (b < c) (without evaluating b twice). See the Python language documentation … Read more
This question was the subject of my blog on September 20th 2010. Josh and Chad’s answers (“they add no value so why require them?” and “to eliminate redundancy”) are basically correct. To flesh that out a bit more: The feature of allowing you to elide the argument list as part of the “larger feature” of … Read more
Short story: The 0 tells the parser it’s dealing with a constant (and not an identifier/reserved word). Something is still needed to specify the number base: the x is an arbitrary choice. Long story: In the 60’s, the prevalent programming number systems were decimal and octal — mainframes had 12, 24 or 36 bits per … Read more