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Java equivalent of unsigned long long?
...gs (what "wrapping integer" types are). Any size number should implicitly convert to any size ring, but rings should only convert to numbers via function or via explicit typecast to the same size number. The behavior of C, where unsigned types generally behave as algebraic rings but sometimes beha...
How can I truncate a double to only two decimal places in Java?
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Formating as a string and converting back to double i think will give you the result you want.
The double value will not be round(), floor() or ceil().
A quick fix for it could be:
String sValue = (String) String.format("%.2f", oldValue);
Double ...
Is it better practice to use String.format over string Concatenation in Java?
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@AmirRaminar: The compiler converts "+" to calls to StringBuilder automatically.
– Martin Schröder
Feb 23 '12 at 14:50
43
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How to convert an enum type variable to a string?
...stead, but I think it's a bit cleaner to require an explicit "ToString" to convert the value to string form.
As a usage example, your OS_type enumeration would be defined as follows:
DEFINE_ENUM_WITH_STRING_CONVERSIONS(OS_type, (Linux)(Apple)(Windows))
While the macro looks at first like it is a...
Convert an image (selected by path) to base64 string
How do you convert an image from a path on the user's computer to a base64 string in C#?
12 Answers
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How to get the unix timestamp in C#
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Error for the second solution: Cannot convert source type 'double' to target type 'long'.
– Pixar
Sep 4 '15 at 15:45
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How to get current time and date in C++?
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std C libraries provide time().
This is seconds from the epoch and can be converted to date and H:M:S using standard C functions. Boost also has a time/date library that you can check.
time_t timev;
time(&timev);
sha...
构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
构建高并发高可用的电商平台架构实践一、 设计理念1. 空间换时间1) 多级缓存，静态化客户端页面缓存（http header中包含Expires Cache of Control，last modified(304，...一、 设计理念
1. 空间换时间
1) 多级缓存，静态化
客户端页面缓...
Function passed as template argument
...code. So the instantiated code for do_op with fadd looks something like:
convert a and b from int to float.
call the function ptr op with float a and float b.
convert the result back to int and return it.
By comparison, our by-value case requires an exact match on the function arguments.
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Where is the itoa function in Linux?
itoa() is a really handy function to convert a number to a string. Linux does not seem to have itoa() , is there an equivalent function or do I have to use sprintf(str, "%d", num) ?
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