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Determining 32 vs 64 bit in C++
...or a way to reliably determine whether C++ code is being compiled in 32 vs 64 bit. We've come up with what we think is a reasonable solution using macros, but was curious to know if people could think of cases where this might fail or if there is a better way to do this. Please note we are trying to...
How does one generate a random number in Apple's Swift language?
... Swift, but the base functions are limited to 32-bit integer types (Int is 64-bit on iPhone 5S and modern Macs). Here's a generic function for a random number of a type expressible by an integer literal:
public func arc4random<T: ExpressibleByIntegerLiteral>(_ type: T.Type) -> T {
var ...
How can I convert an image into a Base64 string?
What is the code to transform an image (maximum of 200 KB) into a Base64 String?
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Can I get Memcached running on a Windows (x64) 64bit environment?
...yone know IF , WHEN or HOW I can get Memcached running on a Windows 64bit environment?
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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
... a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
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Base64 encoding in SQL Server 2005 T-SQL
I'd like to write a T-SQL query where I encode a string as a Base64 string. Surprisingly, I can't find any native T-SQL functions for doing Base64 encoding. Does a native function exist? If not, what's the best way to do Base64 encoding in T-SQL?
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Creating a BLOB from a Base64 string in JavaScript
I have Base64-encoded binary data in a string:
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How to base64 encode image in linux bash / shell
I'm trying to base64 encode an image in a shell script and put it into variable:
6 Answers
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How to print a int64_t type in C
C99 standard has integer types with bytes size like int64_t. I am using the following code:
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六、缓存的问题
缓存可以用来缓存动态页面，也可以用来缓存查询的数据。缓存通常有那么几个问题：
1）缓存的更新。也叫缓存和数据库的同步。有这么几种方法，一是缓存time out，让缓存失效，重查，二...