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How to sort Map values by key in Java?
I have a Map that has strings for both keys and values.
15 Answers
15
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BackgroundWorker vs background Thread
... the choice of background thread implementation I should use on a windows form app. Currently I have a BackgroundWorker on a form that has an infinite (while(true)) loop. In this loop I use WaitHandle.WaitAny to keep the thread snoozing until something of interest happens. One of the event han...
Is there a short contains function for lists?
... this syntax:
if myItem in list:
# do something
Also, inverse operator:
if myItem not in list:
# do something
It's work fine for lists, tuples, sets and dicts (check keys).
Note that this is an O(n) operation in lists and tuples, but an O(1) operation in sets and dicts.
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How to list all installed packages and their versions in Python?
... can simply call this:
pip freeze
It will also include version numbers for the installed packages.
Update
pip has been updated to also produce the same output as pip freeze by calling:
pip list
Note
The output from pip list is formatted differently, so if you have some shell script that par...
Error: Configuration with name 'default' not found in Android Studio
I am using the volley library to perform network operation in android. So I am trying to add this library in my project which is created in Android Studio and gradle system.
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Appending an element to the end of a list in Scala
...operation has a complexity of O(n). If you need this operation frequently, or for long lists, consider using another data type (e.g. a ListBuffer).
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Difference between float and double in php?
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There is no difference in PHP. float, double or real are the same datatype.
At the C level, everything is stored as a double.
The real size is still platform-dependent.
See the manual for more details:
http://www.php.net/manual/en/language.types.float.php
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PHP foreach change original array values
...ou need it and test the results.
I would recommend doing the following:
foreach ($fields as $key => $field) {
if ($field['required'] && strlen($_POST[$field['name']]) <= 0) {
$fields[$key]['value'] = "Some error";
}
}
So basically use $field when you need the values...
How to present a simple alert message in java?
...n this java desktop app, I just want to alert a message saying "thank you for using java" I have to go through this much suffering:
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What programming practice that you once liked have you since changed your mind about? [closed]
...me to realize that some practices that we once thought were great are not (or no longer apply).
48 Answers
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