大约有 42,000 项符合查询结果（耗时：0.1351秒） [XML]
Why are floating point numbers inaccurate?
...t numbers are represented a lot like scientific notation: with an exponent and a mantissa (also called the significand). A very simple number, say 9.2, is actually this fraction:
5179139571476070 * 2 -49
Where the exponent is -49 and the mantissa is 5179139571476070. The reason it is impossibl...
What's the difference between assignment operator and copy constructor?
I don't understand the difference between assignment constructor and copy constructor in C++. It is like this:
8 Answers
...
Hiding the scroll bar on an HTML page
...w: hidden;
}
</style>
The code above hides both the horizontal and vertical scrollbar.
If you want to hide only the vertical scrollbar, use overflow-y:
<style type="text/css">
body {
overflow-y: hidden;
}
</style>
And if you want to hide only the horizonta...
What is a Shim?
...ary that transparently intercepts an API, changing the parameters passed, handling the operation itself, or redirecting the operation elsewhere. Shims typically come about when the behaviour of an API changes, thereby causing compatibility issues for older applications that still rely on the older f...
Why use apparently meaningless do-while and if-else statements in macros?
...
The do ... while and if ... else are there to make it so that a
semicolon after your macro always means the same thing. Let's say you
had something like your second macro.
#define BAR(X) f(x); g(x)
Now if you were to use BAR(X); in an if ...
How can I reconcile detached HEAD with master/origin?
...new at the branching complexities of Git. I always work on a single branch and commit changes and then periodically push to my remote origin.
...
CSS hexadecimal RGBA?
...
The CSS Color Module Level 4 will probably support 4 and 8-digit hexadecimal RGBA notation!
Three weeks ago (18th of December 2014) the CSS Color Module Level 4 editor's draft was submitted to the CSS W3C Working Group. Though in a state which is heavily susceptible to change...
EC2 Instance Cloning
Is it possible to clone a EC2 instance data and all?
7 Answers
7
...
What is the aspnet_client folder for under the IIS structure?
I notice that there's frequently an aspnet_client folder under the standard IIS web folder structure. What is this used for? Is it needed?
...
How do I import the javax.servlet API in my Eclipse project?
...
Ensure you've the right Eclipse and Server
Ensure that you're using at least Eclipse IDE for Enterprise Java developers (with the Enterprise). It contains development tools to create dynamic web projects and easily integrate servletcontainers (those tools a...