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C# '@' before a String [duplicate]
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It means to interpret the string literally (that is, you cannot escape any characters within the string if you use the @ prefix). It enhances readability in cases where it can be used.
For example, if you were working with a UNC path, this:
@"\\servername\share...
How to condense if/else into one line in Python? [duplicate]
...ompress an if / else statement to one line in Python?
I oftentimes see all sorts of shortcuts and suspect it can apply here too.
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使用 JSON 和 Web API · App Inventor 2 中文网
...式提供给它的后续步骤。在下面的例子中，我们给它 walk all at level 和 title 的关键路径来获取列表中每个帖子的标题（按appearance排序）。这段代码在功能上等同于上面使用 for each 块的代码，但它更简洁。
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Differences between Java 8 Date Time API (java.time) and Joda-Time
...ten use NULL as default for system timezone, default locale, current timestamp etc. while JSR-310 almost always rejects NULL values.
Precision
JSR-310 handles nanosecond precision while Joda-Time is limited to millisecond precision.
Supported fields:
An overview about supported fields in Java-8...
How to automatically generate N “distinct” colors?
I wrote the two methods below to automatically select N distinct colors. It works by defining a piecewise linear function on the RGB cube. The benefit of this is you can also get a progressive scale if that's what you want, but when N gets large the colors can start to look similar. I can also imagi...
Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
...a .copy() at the end, in case you want to later edit this dataframe (for example, assigning new columns would raise the "A value is trying to be set on a copy of a slice from a DataFrame" warning.
– PlasmaBinturong
Mar 23 '19 at 16:38
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How does generic lambda work in C++14?
...ourse, when auto appears at least once in the parameter list).
So your example:
auto glambda = [] (auto a) { return a; };
Will make glambda an instance of this type:
class /* unnamed */
{
public:
template<typename T>
T operator () (T a) const { return a; }
};
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django urls without a trailing slash do not redirect
...ost.". "The APPEND_SLASH setting is only used if CommonMiddleware is installed...". I prefer Michael Gendin's answer for a cleaner solution.
– Wtower
Feb 11 '15 at 9:26
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What does the “assert” keyword do? [duplicate]
What does assert do?
For example in the function:
8 Answers
8
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How to check if array element exists or not in javascript?
... simply:
const arrayHasIndex = (array, index) => Array.isArray(array) && array.hasOwnProperty(index);
usage:
arrayHasIndex([1,2,3,4],4); outputs: false
arrayHasIndex([1,2,3,4],2); outputs: true
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