Difference between typeset and declare: The former is more portable(e.g. ksh), while the latter is more preferable when portability is not a concern. Difference between declare(or typeset) and local when used inside a function: The former implies the latter, but more powerful. For example, declare -i x makes x have the integer attribute, declare -r … Read more
I explain this in my answer to Why was the C syntax for arrays, pointers, and functions designed this way?, and it basically comes down to: the language authors preferred to make the syntax variable-centric rather than type-centric. That is, they wanted a programmer to look at the declaration and think “if I write the … Read more
Use array.push() to add an item to the end of the array. var sample = new Array(); sample.push(new Object()); To do this n times use a for loop. var n = 100; var sample = new Array(); for (var i = 0; i < n; i++) sample.push(new Object()); Note that you can also substitute new … Read more
I ran into this same issue, but I think I know what’s causing the confusion. If you use MySQL Query Analyzer, you can do this just fine: SELECT myvalue INTO @myvar FROM mytable WHERE anothervalue = 1; However, if you put that same query in MySQL Workbench, it will throw a syntax error. I don’t … Read more
I am using the SQL-Developer in Version 3.2. The other stuff didn’t work for me, but this did: define value1 = ‘sysdate’ SELECT &&value1 from dual; Also it’s the slickest way presented here, yet. (If you omit the “define”-part you’ll be prompted for that value)
In Java 9+ you can do: var x = List.of(“xyz”, “abc”); // ‘var’ works only for local variables Java 8 using Stream: Stream.of(“xyz”, “abc”).collect(Collectors.toList()); And of course, you can create a new object using the constructor that accepts a Collection: List<String> x = new ArrayList<>(Arrays.asList(“xyz”, “abc”)); Tip: The docs contains very useful information that usually … Read more