大约有 30,000 项符合查询结果(耗时:0.0508秒) [XML]
Argument list too long error for rm, cp, mv commands
...
No, xargs specifically splits up the list and issues several commands if necessary.
– tripleee
Jul 2 '12 at 7:50
7
...
Does Java have a HashMap with reverse lookup?
... to be one of the implementations of BidiMap.
As a mathematician, I would call this kind of structure a bijection.
share
|
improve this answer
|
follow
|
...
Why use apparently meaningless do-while and if-else statements in macros?
... into
if (corge)
f(corge); g(corge);
else
gralt();
which is syntactically incorrect, as the else is no longer associated with the if. It doesn't help to wrap things in curly braces within the macro, because a semicolon after the braces is syntactically incorrect.
if (corge)
{f(corge); g(c...
Should an Enum start with a 0 or a 1?
...ines:
✔️ DO provide a value of zero on simple enums.
Consider calling the value something like "None." If such a value is not appropriate for this particular enum, the most common default value for the enum should be assigned the underlying value of zero.
Framework Design Guidelines /...
Selector on background color of TextView
I'm attempting to change the background color of an Android TextView widget when the user touches it. I've created a selector for that purpose, which is stored in res/color/selector.xml and roughly looks like that:
...
Does JavaScript have the interface type (such as Java's 'interface')?
... That's not a big deal until you realize:
JavaScript is an extremely dynamically typed language -- you can create an object with the proper methods, which would make it conform to the interface, and then undefine all the stuff that made it conform. It'd be so easy to subvert the type system -- even ...
Declaring variables inside loops, good practice or bad practice?
... their scope is restricted to inside the loop. It cannot be referenced nor called outside of the loop.
This way:
If the name of the variable is a bit "generic" (like "i"), there is no risk to mix it with another variable of same name somewhere later in your code (can also be mitigated using the -...
Where are static methods and static variables stored in Java?
...he same JVM. The above is based on HotSpot for Java 5 and 6 (those are basically the same) since at the time of answering I'd say that most people used those JVMs. Due to major changes in the memory model as of Java 8, the statements above might not be true for Java 8 HotSpot - and I didn't check th...
How do I run a shell script without using “sh” or “bash” commands?
...e your script is located:
export PATH=$PATH:/appropriate/directory
(typically, you want $HOME/bin for storing your own scripts)
share
|
improve this answer
|
follow
...
What are the drawbacks of Stackless Python? [closed]
...ossum, the Python lead, wary. Part of the reason, I think, was support for call/cc that was later removed as being "too much like supporting a goto when there are better higher-level forms." I'm not certain about this history, so just read this paragraph as "Stackless used to require too many change...
