I’m going to heavily quote the Object documentation here, because I think it has some great explanations. I encourage you to read it, and also the documentation for these methods as they’re overridden in other classes, like String. Side note: if you want to try these out for yourself on different objects, use something like … Read more
For all built-in Python objects (like strings, lists, dicts, functions, etc.), if x is y, then x==y is also True. Not always. NaN is a counterexample. But usually, identity (is) implies equality (==). The converse is not true: Two distinct objects can have the same value. Also, is it generally considered better to just use … Read more
Of C, A & P (Consistency, Availability & Partition tolerance) which 2 are more important to you? Quick reference, the Visual Guide To NoSQL Systems MongodB : Consistency and Partition Tolerance CouchDB : Availability and Partition Tolerance A blog post, Cassandra vs MongoDB vs CouchDB vs Redis vs Riak vs HBase vs Membase vs Neo4j … Read more
Assuming ASCII strings: string1 = ‘Hello’ string2 = ‘hello’ if string1.lower() == string2.lower(): print(“The strings are the same (case insensitive)”) else: print(“The strings are NOT the same (case insensitive)”) As of Python 3.3, casefold() is a better alternative: string1 = ‘Hello’ string2 = ‘hello’ if string1.casefold() == string2.casefold(): print(“The strings are the same (case insensitive)”) … Read more
These articles may help: Git vs. Mercurial: Please Relax (Git is MacGyver and Mercurial is James Bond) The Differences Between Mercurial and Git Edit: Comparing Git and Mercurial to celebrities seems to be a trend. Here’s one more: Git is Wesley Snipes, Mercurial is Denzel Washington
JavaScript is very flexible with regards to checking for “null” values. I’m guessing you’re actually looking for empty strings, in which case this simpler code will work: if(!pass || !cpass || !email || !cemail || !user){ Which will check for empty strings (“”), null, undefined, false and the numbers 0 and NaN. Please note that … Read more
You misunderstand how boolean expressions work; they don’t work like an English sentence and guess that you are talking about the same comparison for all names here. You are looking for: if x == 1 or y == 1 or z == 1: x and y are otherwise evaluated on their own (False if 0, … Read more
This snippet on the Advanced Bash Scripting Guide says: # The == comparison operator behaves differently within a double-brackets # test than within single brackets. [[ $a == z* ]] # True if $a starts with a “z” (wildcard matching). [[ $a == “z*” ]] # True if $a is equal to z* (literal matching). … Read more
is is identity testing, == is equality testing. what happens in your code would be emulated in the interpreter like this: >>> a=”pub” >>> b = ”.join([‘p’, ‘u’, ‘b’]) >>> a == b True >>> a is b False so, no wonder they’re not the same, right? In other words: a is b is the … Read more
Unfortunately there is no perfect way, unless you use _proto_ recursively and access all non-enumerable properties, but this works in Firefox only. So the best I can do is to guess usage scenarios. 1) Fast and limited. Works when you have simple JSON-style objects without methods and DOM nodes inside: JSON.stringify(obj1) === JSON.stringify(obj2) The ORDER … Read more