大约有 45,000 项符合查询结果（耗时：0.0511秒） [XML]
Disabling browser print options (headers, footers, margins) from page?
...
<ol>
<li>
<a href="data:,No Javascript :-(" target="_blank">Middle-click to open in new tab</a>
</li>
<li>
<a href="javascript:print()">Print</a>
</li>
</ol><!-- Hack to work around stack snippet restrictions --><...
Is < faster than
...(a <=901)
cmpl $901, -4(%rbp)
jg .L3
My example if is from GCC on x86_64 platform on Linux.
Compiler writers are pretty smart people, and they think of these things and many others most of us take for granted.
I noticed that if it is not a constant, then the same machine code is generated in...
Rails formatting date
...
Use
Model.created_at.strftime("%FT%T")
where,
%F - The ISO 8601 date format (%Y-%m-%d)
%T - 24-hour time (%H:%M:%S)
Following are some of the frequently used useful list of Date and Time formats that you could specify in strftime metho...
Generating Random Passwords
...Define default min and max password lengths.
private static int DEFAULT_MIN_PASSWORD_LENGTH = 8;
private static int DEFAULT_MAX_PASSWORD_LENGTH = 10;
// Define supported password characters divided into groups.
// You can add (or remove) characters to (from) these groups.
priv...
What's the difference between Perl's backticks, system, and exec?
...t, and don't want to wait for it to return. system is really just
sub my_system {
die "could not fork\n" unless defined(my $pid = fork);
return waitpid $pid, 0 if $pid; #parent waits for child
exec @_; #replace child with new process
}
You may also want to read the waitpid and perli...
Use CSS3 transitions with gradient backgrounds
...
And here's a fiddle for that: jsfiddle.net/Volker_E/RksTV The key is the property background-size, which you can't in IE8. caniuse.com/#search=background-size Apart from that it's a nice solution.
– Volker E.
Nov 7 '13 at 22:35
...
In git, what is the difference between merge --squash and rebase?
...--commit with --squash
Previously, when --squash was supplied, 'option_commit' was silently
dropped. This could have been surprising to a user who tried to override
the no-commit behavior of squash using --commit explicitly.
git/git builtin/merge.c#cmd_merge() now includes:
if (option_co...
Is there an easy way to add a border to the top and bottom of an Android View?
...move the solid if you don't want a fill. The set background="@drawable/your_shape_drawable" on your layout/view.
Option 2: Background View
Here's a little trick I've used in a RelativeLayout. Basically you have a black square under the view you want to give a border, and then give that view some p...
How to reduce iOS AVPlayer start delay
...operties and methods provided by the AVAsset class that may help:
- (void)_pu_setCachedDuration:(id)arg1;
- (id)pu_cachedDuration;
- (struct
{
long long x1;
int x2;
unsigned int x3;
long long x4;
})pu_duration;
- (void)pu_loadDurationWithCompletionHandler:(id /* block */)arg1;
...
Using arrays or std::vectors in C++, what's the performance gap?
...mbly code was generated by gcc 4.1.0 invoked with g++ -O3 -S on a
// x86_64-suse-linux machine.
#include <vector>
struct S
{
int padding;
std::vector<int> v;
int * p;
std::vector<int>::iterator i;
};
int pointer_index (S & s) { return s.p[3]; }
// movq 32(%r...