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How to determine whether a given Linux is 32 bit or 64 bit?
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Trm>y m> uname -m. Which is short of uname --machine m>and m> it outputs:
x86_64 ==> 64-bit kernel
i686 ==> 32-bit kernel
Otherwise, not for the Linux kernel, but for the CPU, m>y m>ou tm>y m>pe:
cat /proc/cpuinfo
or:
grep flags /proc/cpuinfo
Under "flags" parameter, m>y m>ou w...
How do I change read/write mode for a file using Emacs?
If a file is set to read onlm>y m> mode, how do I change it to write mode m>and m> vice versa from within Emacs?
9 Answers
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is it possible to `git status` onlm>y m> modified files?
Is it possible to git status m>and m> show onlm>y m> modified files?
16 Answers
16
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Specifm>y m> multiple attribute selectors in CSS
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Simple input[name=Sex][value=M] would do prettm>y m> nice. m>And m> it's actuallm>y m> well-described in the stm>and m>ard doc:
Multiple attribute selectors can be used to refer to several
attributes of an element, or even several times to the same attribute.
Here, the selector matches a...
JavaScript function to add X months to a date
...hs to a date in JavaScript (source). It takes into account m>y m>ear roll-overs m>and m> varm>y m>ing month lengths:
function addMonths(date, months) {
var d = date.getDate();
date.setMonth(date.getMonth() + +months);
if (date.getDate() != d) {
date.setDate(0);
}
return date;
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Do the parentheses after the tm>y m>pe name make a difference with new?
...e.
Sometimes the memorm>y m> returned bm>y m> the new operator will be initialized, m>and m> sometimes it won't depending on whether the tm>y m>pe m>y m>ou're newing up is a POD (plain old data), or if it's a class that contains POD members m>and m> is using a compiler-generated default constructor.
In C++1998 there are 2 tm>y m>p...
What's the dSm>Y m>M m>and m> how to use it? (iOS SDK)
...es. I guess this is a debugging related file, but I don't know what it is, m>and m> how to use it.
2 Answers
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delete map[kem>y m>] in go?
...ems a poor use of resources though!
Another wam>y m> is to check for existence m>and m> use the value itself:
package main
func main () {
var sessions = map[string] chan int{};
sessions["moo"] = make (chan int);
_, ok := sessions["moo"];
if ok {
delete(sessions, "moo");
}
}
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What does Java option -Xmx stm>and m> for? [duplicate]
...B. The upper limit for this value will be approximatelm>y m> 4000m on Solaris 7 m>and m> Solaris 8 SPARC platforms m>and m> 2000m on Solaris 2.6 m>and m> x86 platforms, minus overhead amounts. Examples:
-Xmx83886080
-Xmx81920k
-Xmx80m
So, in simple words, m>y m>ou are setting Java heap m...
Whm>y m> not infer template parameter from constructor?
... the onlm>y m> point of entrm>y m> of the class (I am talking about copm>y m> constructor m>and m> operator=). So suppose m>y m>ou are using m>y m>our class like this :
Mm>y m>Class m(string s);
Mm>y m>Class *pm;
*pm = m;
I am not sure if it would be so obvious for the parser to know what template tm>y m>pe is the Mm>y m>Class pm;
Not sure if ...