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How to “properly” print a list?
...f the steps in @TokenMacGuy's one-liner. First he uses the map function to convert each item in the list to a string (actually, he's making a new list, not converting the items in the old list). Then he's using the string method join to combine those strings with ', ' between them. The rest is just ...
How to create a new object instance from a Type
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@KonradRudolph Ah sorry, misinterpreted "such an operation" to mean instantiating a type that's only known at runtime; instead of meaning using a runtime type as a generic type parameter.
– AnorZaken
May 31 '17 at ...
What is the memory consumption of an object in Java?
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Mindprod points out that this is not a straightforward question to answer:
A JVM is free to store data any way it pleases internally, big or little endian, with any amount of padding or overhead, though primitives must behave as if ...
Find a pair of elements from an array whose sum equals a given number
Given array of n integers and given a number X, find all the unique pairs of elements (a,b), whose summation is equal to X.
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Is it possible to get all arguments of a function as single object inside that function?
... end])
Array.indexOf(searchElement[, fromIndex])
I think the best way to convert a arguments object to a real Array is like so:
argumentsArray = [].slice.apply(arguments);
That will make it an array;
reusable:
function ArgumentsToArray(args) {
return [].slice.apply(args);
}
(function() {...
Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...学习应该从打印"Hello, world"开始。在Swift，就是一行:
println("Hello, world")
如果你写过C或Objective-C代码，这个语法看起来很熟悉，在Swift，这就是完整的程序了。你无需导入(import)一个单独的库供输入输出和字符串处理。全局范...
How to insert a SQLite record with a datetime set to 'now' in Android application?
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so above you are taking a Date object and converting it to a string to be placed in a sqlite column.. but when you pull that string from the database, how do you convert it back to a Date object?
– erik
Apr 30 '15 at 3:34
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Change from SQLite to PostgreSQL in a fresh Rails project
...in SQLite (The dev and production). Since I am moving to heroku, I want to convert my database to PostgreSQL.
13 Answers
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Determining the size of an Android view at runtime
...nually:
view.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
int width=view.getMeasuredWidth();
int height=view.getMeasuredHeight();
If you know the size of the container:
val widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(maxWidth, View.MeasureSpec.AT_MOST)
val heigh...
One-liner to check whether an iterator yields at least one element?
... iterator in case any_check ever needs to advance. This is worse than just converting the original iterator to a list.
– Rafał Dowgird
Mar 3 '11 at 8:54
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