braces

What is the meaning of curly braces? [closed]

由 不羁的心 提交于 2019-11-27 01:13:37
问题 Just starting to figure Python out. I've read this question and its responses: Is it true that I can't use curly braces in Python? and I still can't fathom how curly braces work, especially since pages like Simple Programs: http://wiki.python.org/moin/SimplePrograms use curly braces all over the place. I understand square brackets and regular curved parentheses, but I don't know what's meant by "defining dictionaries" or what they're supposed to represent. 回答1: "Curly Braces" are used in

How can I extract a string between matching braces in Perl?

由 十年热恋 提交于 2019-11-26 23:15:23
问题 My input file is as below : HEADER {ABC|*|DEF {GHI 0 1 0} {{Points {}}}} {ABC|*|DEF {GHI 0 2 0} {{Points {}}}} {ABC|*|XYZ:abc:def {GHI 0 22 0} {{Points {{F1 1.1} {F2 1.2} {F3 1.3} {F4 1.4}}}}} {ABC|*|XYZ:ghi:jkl {JKL 0 372 0} {{Points {}}}} {ABC|*|XYZ:mno:pqr {GHI 0 34 0} {{Points {}}}} { ABC|*|XYZ:abc:pqr {GHI 0 68 0} {{Points {{F1 11.11} {F2 12.10} {F3 14.11} {F4 16.23}}}} } TRAILER I want to extract the file into an array as below : $array[0] = "{ABC|*|DEF {GHI 0 1 0} {{Points {}}}}"

Why is this Java code in curly braces ({}) outside of a method?

由 点点圈 提交于 2019-11-26 20:24:34
I am getting ready for a java certification exam and I have seen code LIKE this in one of the practice tests: class Foo { int x = 1; public static void main(String [] args) { int x = 2; Foo f = new Foo(); f.whatever(); } { x += x; } // <-- what's up with this? void whatever() { ++x; System.out.println(x); } } My question is ... Is it valid to write code in curly braces outside a method? What are the effects of these (if any)? Shankar Raju Borrowed from here - Normally, you would put code to initialize an instance variable in a constructor. There are two alternatives to using a constructor to

List of all unicode&#39;s open/close brackets?

由 你。 提交于 2019-11-26 11:49:41
问题 What is a list of every unicode bracket-like characters (including, for example: {}[]()<> )? What is a good way to search for unicode characters? 回答1: There is a plain-text database of information about every Unicode character available from the Unicode Consortium; the format is described in Unicode Annex #44. The primary information is contained in UnicodeData.txt. Open and close punctuation characters are denoted with Ps (punctuation start) and Pe (punctuation end) in the General_Category

PHP curly braces in array notation

由 若如初见. 提交于 2019-11-26 11:28:54
问题 I\'d just come across a very weird bit of php code: $oink{\'pig\'} = 1; var_dump($oink); $oink{\'pig\'} = \'123123\'; echo $oink{\'pig\'}; /* => 123123 */ echo $oink[\'pig\']; /* => 123123 */ It works like an array, but nowhere mentioned in the manual. What is this? 回答1: It is mentioned in the manual. {} is just an alternative syntax to [] §: Both square brackets and curly braces can be used interchangeably for accessing array elements (e.g. $array[42] and $array{42} will both do the same
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