大约有 3,300 项符合查询结果（耗时：0.0170秒） [XML]
What is output buffering?
...ing content.
Consider this example:
<?php
ob_start( );
echo "Hello World";
if ( $some_error )
{
header( "Location: error.php" );
exit( 0 );
}
?>
share
|
...
How can I troubleshoot my Perl CGI script?
...est.pl
use 5.10.1;
use warnings;
use strict;
my $b = '1';
my $a = sub { "hello $b there" };
$b = '2';
print "YEAH " . $a->() . " CMON\n";
$b = '3';
print "CMON " . &$a . " YEAH\n";
$DB::single=1; # BREAKPOINT
$b = '4';
print "STEP " . &$a . " NOW\n";
$b = '5';
print "STEP " . &$a...
Remove empty elements from an array in Javascript
...(function(e){ return e.replace(/(\r\n|\n|\r)/gm,"")});
Example:
arr = ["hello",0,"",null,undefined,1,100," "]
arr.filter(function(e){return e});
Return:
["hello", 1, 100, " "]
UPDATE (based on Alnitak's comment)
In some situations you may want to keep "0" in the array and remove anything ...
Scala: Nil vs List()
...ary as an accumulator value for foldLeft? Example - scala> Map(1 -> "hello", 2 -> "world").foldLeft(List[String]())( (acc, el) => acc :+ el._2) res1: List[String] = List(hello, world) Using Nil as the accumulator here wouldn't work.
– Kevin Meredith
...
Batch file: Find if substring is in string (not in a file)
... bcd
endlocal
And the results of various runs:
c:\testarea> testprog hello
c:\testarea> testprog abcdef
It contains bcd
c:\testarea> testprog bcd
It contains bcd
A couple of notes:
The if statement is the meat of this solution, everything else is support stuff.
The x before the two...
How does the const constructor actually work?
...nst Foo(1, 3); // $Foo$int$1$int$3
var baz1 = const Baz(const Foo(1, 1), "hello"); // $Baz$Foo$int$1$int$1$String$hello
var baz2 = const Baz(const Foo(1, 1), "hello"); // $Baz$Foo$int$1$int$1$String$hello
Constants are not recreated each time. They are canonicalized at compile time and stored in ...
How to declare Return Types for Functions in TypeScript
... this.greeting = message;
}
greet() : string {
return "Hello, " + this.greeting;
}
}
var greeter = new Greeter("Hi");
var result = greeter.greet();
Here is the number example - you'll see red squiggles in the playground editor if you try this:
greet() : number {
retu...
How to use R's ellipsis feature when writing your own function?
...me, except with a default argument:
> talk <- function(func, msg=c("Hello","World!"), ...){
+ func(msg, ...);
+ }
> talk(cat,sep=":")
Hello:World!
> talk(cat,sep=",", fill=1)
Hello,
World!
>
As you can see, you can use this to pass 'extra' arguments to a function within your fu...
Specify multiple attribute selectors in CSS
...e same attribute.
Here, the selector matches all SPAN elements whose "hello" attribute
has exactly the value "Cleveland" and whose "goodbye" attribute has
exactly the value "Columbus":
span[hello="Cleveland"][goodbye="Columbus"] { color: blue; }
As a side note, using quotation marks ...
Grep for literal strings
...
cat list.txt
one:hello:world
two:2:nothello
three:3:kudos
grep --color=always -F"hello
three" list.txt
output
one:hello:world
three:3:kudos
share
|
...