for loop over specific files in a directory using Bash
#!/bin/bash FILES=/home/shep/Desktop/test/* for f in $FILES do if [[ “$f” != *\.* ]] then DO STUFF fi done
for-loop
How to configure a maximum number of threads in a Parallel.For
You need to specify a ParallelOptions value with a MaxDegreeOfParallelism: For example: Parallel.For(0, 10, new ParallelOptions { MaxDegreeOfParallelism = 4 }, count => { Console.WriteLine(count); });
How to return from a forEach loop in Dart?
There is no way to return a value from forEach. Just use a for loop instead. bool nameExists(players, player) { for(var f in players) { if (f.data[‘name’].toLowerCase() == player.toLowerCase()) { return true; } } return false; }
Breaking out of a loop from within a function called in that loop
You cannot use break; this way, it must appear inside the body of the for loop. There are several ways to do this, but neither is recommended: you can exit the program with the exit() function. Since the loop is run from main() and you do not do anything after it, it is possible to … Read more
Do an action only if a condition is met in all iterations of a loop
You could also use a simple LINQ query like this one: if (Enumerable.Range(1, 20).All(b => i % b == 0)) DoAction();
Variable iterating on itself – different behavior with different types
Please see edits below! For Each edits also added below under Edit2 More edits about ForEach and Collections at Edit3 One last edit about ForEach and Collections at Edit4 A final note about iteration behavior at Edit5 Part of the subtlety of this odd behavior in the semantics of variant evaluation when used as a … Read more
How to slice a generator object or iterator?
In general, the answer is itertools.islice, but you should note that islice doesn’t, and can’t, actually skip values. It just grabs and throws away start values before it starts yield-ing values. So it’s usually best to avoid islice if possible when you need to skip a lot of values and/or the values being skipped are … Read more
repeat an iteration of for loop
Do it like this: for eachId in listOfIds: successful = False while not successful: response = makeRequest(eachId) if response == ‘market is closed’: time.sleep(24*60*60) #sleep for one day else: successful = True The title of your question is the clue. Repeating is achieved by iteration, and in this case you can do it simply with … Read more
savefig loop adds previous plots to figure
You have to close current figure after saving with function plt.close(): http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.close Or you have to clean current figure after saving by plt.clf(): http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.clf