Try following, you should change from -z to -n as follows and add $ to your variable too. if [[ -n “$list_Data” ]] then echo “not Empty” else echo “empty” fi Explanation: From man test page as follows(It checks if a variable is having any value or not. If it has any value then condition … Read more
Use CELLFUN %# find empty cells emptyCells = cellfun(@isempty,a); %# remove empty cells a(emptyCells) = []; Note: a(i)==[] won’t work. If you want to know whether the the i-th cell is empty, you have to use curly brackets to access the content of the cell. Also, ==[] evaluates to empty, instead of true/false, so you … Read more
isEmpty() The java string isEmpty() method checks if this string is empty. It returns true, if the length of the string is 0 otherwise false e.g. System.out.println(“”.isEmpty()); // Prints – True System.out.println(” “.isEmpty()); //Prints – False Java 11 – isBlank() The new instance method java.lang.String.isBlank() returns true if the string is empty or contains only … Read more
Useful method from Apache Commons: org.apache.commons.lang.StringUtils.isBlank(String str) https://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringUtils.html#isBlank(java.lang.String)
It’s very easy: not all(t1) returns False only if all values in t1 are non-empty/nonzero and not None. all short-circuits, so it only has to check the elements up to the first empty one, which makes it very fast.
Try this: function isEmpty(map) { for(var key in map) { if (map.hasOwnProperty(key)) { return false; } } return true; } Your solution works, too, but only if there is no library extending the Object prototype. It may or may not be good enough.
Instead of using .Count() == 0, just use .Count == 0. This is using the stack’s property rather than the linq extension method.
Assuming you mean Queue<T> you could just use: if (queue.Count != 0) But why bother? Just iterate over it anyway, and if it’s empty you’ll never get into the body: Queue<string> queue = new Queue<string>(); // It’s fine to use foreach… foreach (string x in queue) { // We just won’t get in here… }
How you test depends on the Property’s DataType: | Type | Test | Test2 | Numeric (Long, Integer, Double etc.) | If obj.Property = 0 Then | | Boolen (True/False) | If Not obj.Property Then | If obj.Property = False Then | Object | If obj.Property Is Nothing Then | | String | If obj.Property … Read more
An object of a class cannot be set to NULL; however, you can set a pointer (which contains a memory address of an object) to NULL. Example of what you can’t do which you are asking: Cat c; c = NULL;//Compiling error Example of what you can do: Cat c; //Set p to hold the … Read more