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How many Activities vs Fragments?

...tent.setClass(getActivity(), DetailsActivity.class); intent.putExtra("index", index); startActivity(intent); } } Another advantage of the ABS pattern is that you do not end up with a Tablet Activity containing lots of logic, and that means that you save memory...
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bash assign default value

...riable without needing to reassign # colons suppress attempting to run the string unset EGGS : ${EGGS=spam} echo 1 $EGGS # 1 spam unset EGGS : ${EGGS:=spam} echo 2 $EGGS # 2 spam EGGS= : ${EGGS=spam} echo 3 $EGGS # 3 (set, but blank -> leaves alone) EGGS= : ${EGGS:=spam} echo ...
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Convert String to Calendar Object in Java

... DateTimeFormatter.ofPattern( "E MMM d HH:mm:ss z uuuu" ) ) ).toString() 2011-03 Avoid legacy date-time classes The modern way is with java.time classes. The old date-time classes such as Calendar have proven to be poorly-designed, confusing, and troublesome. Define a custom form...
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How to use OpenSSL to encrypt/decrypt files?

...bove! -K key The actual key to use: this must be represented as a string comprised only of hex digits. If only the key is specified, the IV must additionally be specified using the -iv option. When both a key and a password are specified, the key given with the -K option wi...
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Auto increment in phpmyadmin

...r table Click on the pencil of the variable you want auto_increment under "Extra" tab choose "auto_increment" then go to "Operations" tab of your table Under "Table options" -> auto_increment type -> 10000 share ...
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Use tab to indent in textarea

... cleaner to use a variable or function parameter and store the indentation char(s) there. But you know what to replace now: The +1 defines how much chars the caret is moved. – StanE Oct 13 '16 at 17:13 ...
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How does free know how much to free?

...e technique in my own functions to save me from needing to cart around the extra variable of the array's length? 11 Answers...
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C# Lambda expressions: Why should I use them?

...tra work required to create a full method. Consider this example: List<string> people = new List<string> { "name1", "name2", "joe", "another name", "etc" }; string person = people.Find(person => person.Contains("Joe")); versus public string FindPerson(string nameContains, List<...
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What is the difference between HTTP and REST?

...d a header info to every request. HTTP Methods supported by REST: GET: /string/someotherstring It is idempotent and should ideally return the same results every time a call is made PUT: Same like GET. Idempotent and is used to update resources. POST: should contain a url and body Used for cre...
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Find duplicate lines in a file and count how many time each line was duplicated?

...at does just the counting in a single pass using a prefix tree (in my case strings often have common prefixes) or similar, that should do the trick in O(n) * avg_line_len. Does anyone know such a commandline tool? – Droggl Nov 20 '13 at 17:27 ...