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iterating over and removing from a map [duplicate]
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As of Java 8 you could do this as follows:
map.entrySet().removeIf(e -> <boolean expression>);
Oracle Docs: entrySet()
The set is backed by the map, so changes to the map are reflected in the set, and vice-versa
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Get path from open file in Python
If I have an opened file, is there an os call to get the complete path as a string?
4 Answers
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How can I play sound in Java?
...ary. 2) For a good example of using Clip, see the JavaSound info. page. 3) If a method requires an URL (or File) give it a dang URL (or File) rather than accept a String that represents one. (Just a personal 'bee in my bonnet'.) 4) e.printStackTrace(); provides more information with less typing tha...
Showing which files have changed between two revisions
...ave been separated for a while and wanted to know which files have been modified.
18 Answers
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Does every Javascript function have to return a value?
...he short answer is no.
The real answer is yes: the JS engine has to be notified that some function has finished its business, which is done by the function returning something. This is also why, instead of "finished", a function is said to "have returned".
A function that lacks an explicit return s...
How to split a comma-separated string?
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If you need to keep empty entries (eg.for consistent array length) use split(",",-1) as per stackoverflow.com/questions/14602062/…
– Fast Engy
Jul 16 '15 at 2:16
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How to create a file with a given size in Linux?
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dd if=/dev/zero of=upload_test bs=file_size count=1
Where file_size is the size of your test file in bytes
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How to add additional fields to form before submit?
... Information"}
]);
$.post('/change-user-details', form, function(d) {
if (d.error) {
alert("There was a problem updating your user details")
}
});
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Converting Secret Key into a String and Vice Versa
...);}
catch (NoSuchAlgorithmException e) {/* LOG YOUR EXCEPTION */}
if (secretKey != null) {stringKey = Base64.encodeToString(secretKey.getEncoded(), Base64.DEFAULT)}
String to SecretKey:
// DECODE YOUR BASE64 STRING
// REBUILD KEY USING SecretKeySpec
byte[] encodedKey = Base64.de...
Understanding REST: Verbs, error codes, and authentication
...T: Update the addressed member of the collection or create it with the specified ID.
POST: Treats the addressed member as a collection in its own right and creates a new subordinate of it.
DELETE: Delete the addressed member of the collection.
Point 2: I need more verbs
In general, when you thi...