They are not equivalent. The first will execute the block following the if statement if myVar is truthy (i.e. evaluates to true in a conditional), while the second will execute the block if myVar is any value other than null. The only values that are not truthy in JavaScript are the following (a.k.a. falsy values): … Read more
I did this research the last week and I ended up with the same 2 libraries. As I’m using Spring 3 (that adopts Jackson in its default Json view ‘JacksonJsonView’) it was more natural for me to do the same. The 2 lib are pretty much the same… at the end they simply map to … Read more
You should use reflect.DeepEqual() DeepEqual is a recursive relaxation of Go’s == operator. DeepEqual reports whether x and y are “deeply equal,” defined as follows. Two values of identical type are deeply equal if one of the following cases applies. Values of distinct types are never deeply equal. Array values are deeply equal when their … Read more
If you’re looking for efficiency, use this: string.Equals(val, “astringvalue”, StringComparison.OrdinalIgnoreCase) Ordinal comparisons can be significantly faster than culture-aware comparisons. ToLowerCase can be the better option if you’re doing a lot of comparisons against the same string, however. As with any performance optimization: measure it, then decide!
Date has before and after methods and can be compared to each other as follows: if(todayDate.after(historyDate) && todayDate.before(futureDate)) { // In between } For an inclusive comparison: if(!historyDate.after(todayDate) && !futureDate.before(todayDate)) { /* historyDate <= todayDate <= futureDate */ } You could also give Joda-Time a go, but note that: Joda-Time is the de facto standard … Read more
Below are three approaches to solving this problem (and there are many others). The first is a standard approach in computer vision, keypoint matching. This may require some background knowledge to implement, and can be slow. The second method uses only elementary image processing, and is potentially faster than the first approach, and is straightforward … Read more
You can use the localeCompare() method. string_a.localeCompare(string_b); /* Expected Returns: 0: exact match -1: string_a < string_b 1: string_a > string_b */ Further Reading: MDN: String.prototype.localeCompare Stack Overflow – Is there a JavaScript strcmp()? Tutorials Point: JavaScript String – localeCompare() Method
I’m still learning JavaScript, and the only way that I’ve found which works for me to compare two dates without the time is to use the setHours method of the Date object and set the hours, minutes, seconds and milliseconds to zero. Then compare the two dates. For example, date1 = new Date() date2 = … Read more
You can invoke devenv.exe /diff list1.txt list2.txt from the Visual Studio Developer Command Prompt or, if a Visual Studio instance is already running, you can type Tools.DiffFiles in the Command window, with a handy file name completion:
Use itertools.groupby (see the itertools recipes): from itertools import groupby def all_equal(iterable): g = groupby(iterable) return next(g, True) and not next(g, False) or without groupby: def all_equal(iterator): iterator = iter(iterator) try: first = next(iterator) except StopIteration: return True return all(first == x for x in iterator) There are a number of alternative one-liners you might … Read more