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What is the Simplest Way to Reverse an ArrayList?
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Collections.reverse(List); I used it in an Android project, works fine.
– Damir Varevac
Jul 7 '18 at 15:23
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The difference between sys.stdout.write and print?
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print first converts the object to a string (if it is not already a string). It will also put a space before the object if it is not the start of a line and a newline character at the end.
When using stdout, you need to convert the obje...
How to check if a word is an English word with Python?
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The same mention applies here too: a lot faster when converted to a set: set(words.words())
– Iulius Curt
Sep 30 '14 at 19:41
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Why does C++11's lambda require “mutable” keyword for capture-by-value, by default?
... it's called. This is the difference between an object orientated function and a function using a global variable, effectively.
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Java: method to get position of a match in a String?
...Found 'love' at index 2 - 5
General Rule :
Regex search left to right, and once the match characters has been used, it cannot be reused.
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CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
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769AEF65 mov eax, ebx
769AEF67 and eax, 0Eh ; 检查参数是否正确，目前第二个参数只用了一个字节
769AEF6A cmp eax, ebx
769AEF6C jnz loc_76A0B8C7
769AEF72 push edi
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Where is Java's Array indexOf?
I must be missing something very obvious, but I've searched all over and can't find this method.
13 Answers
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How do you round a floating point number in Perl?
...f perldoc -q round
Does Perl have a round() function? What about ceil() and floor()?
Trig functions?
Remember that int() merely truncates toward 0. For rounding to a certain number of digits, sprintf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3...
How to compare objects by multiple fields
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You can implement a Comparator which compares two Person objects, and you can examine as many of the fields as you like. You can put in a variable in your comparator that tells it which field to compare to, although it would probably be simpler to just write multiple comparators.
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Is it possible to Pivot data using LINQ?
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GroupBy in Linq does not work the same as SQL. In SQL, you get the key and aggregates (row/column shape). In Linq, you get the key and any elements as children of the key (hierarchical shape). To pivot, you must project the hierarchy back into a row/column form of your choosing.
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