The exception message is actually pretty descriptive. The contract it mentions is transitivity: if A > B and B > C then for any A, B and C: A > C. I checked it with paper and pencil and your code seems to have few holes: if (card1.getRarity() < card2.getRarity()) { return 1; you do … Read more
Oldest: oldest = min(datetimes) Youngest before now: now = datetime.datetime.now(pytz.utc) youngest = max(dt for dt in datetimes if dt < now)
You can use the Enumerable.SequenceEqual() in the System.Linq to compare the contents in the array bool isEqual = Enumerable.SequenceEqual(target1, target2);
should use object == null over Objects.isNull() in a if statement? If you look at the source code of IsNull method, /* Returns true if the provided reference is null otherwise returns false.*/ public static boolean isNull(Object obj) { return obj == null; } It is the same. There is no difference. So you can … Read more
If your array items are not objects- if they are numbers or strings, for example, you can compare their joined strings to see if they have the same members in any order- var array1= [10, 6, 19, 16, 14, 15, 2, 9, 5, 3, 4, 13, 8, 7, 1, 12, 18, 11, 20, 17]; var … Read more
You can use a $where. Just be aware it will be fairly slow (has to execute Javascript code on every record) so combine with indexed queries if you can. db.T.find( { $where: function() { return this.Grade1 > this.Grade2 } } ); or more compact: db.T.find( { $where : “this.Grade1 > this.Grade2” } ); UPD for … Read more
The reduce is good for stuff like this: to perform aggregate operations (like min, max, avg, etc.) on an array of objects, and return a single result: myArray.reduce(function(prev, curr) { return prev.Cost < curr.Cost ? prev : curr; }); …or you can define that inner function with ES6 function syntax: (prev, curr) => prev.Cost < … Read more
The slowest possible method is to compare two files byte by byte. The fastest I’ve been able to come up with is a similar comparison, but instead of one byte at a time, you would use an array of bytes sized to Int64, and then compare the resulting numbers. Here’s what I came up with: … Read more
If all your dates are posterior to the 1st of January of 1970, you could use something like: $today = date(“Y-m-d”); $expire = $row->expireDate; //from database $today_time = strtotime($today); $expire_time = strtotime($expire); if ($expire_time < $today_time) { /* do Something */ } If you are using PHP 5 >= 5.2.0, you could use the DateTime … Read more
git‘s diff is more functional than the standard unix diff. I often want to do this and since this question ranks highly on google, I want this answer to show up. This question: How to use git diff –color-words outside a Git repository? Shows how to use git to diff files where at least one … Read more