大约有 3,300 项符合查询结果（耗时：0.0231秒） [XML]
using awk with column value conditions
...ng == is ok or not.
Have you tried ~?. For example, if you want $1 to be "hello":
awk '$1 ~ /^hello$/{ print $3; }' <infile>
^ means $1 start, and $ is $1 end.
share
|
improve this answer
...
How do you use the ? : (conditional) operator in JavaScript?
...it even shorter, without a ternary.
Instead of:
var welcomeMessage = 'Hello ' + (username ? username : 'guest');
You can use:
var welcomeMessage = 'Hello ' + (username || 'guest');
This is Javascripts equivallent of PHP's shorthand ternary operator ?:
Or even:
var welcomeMessage = 'Hel...
jQuery: more than one handler for same event
...sequence, e.g.:
$('#target')
.bind('click',function(event) {
alert('Hello!');
})
.bind('click',function(event) {
alert('Hello again!');
})
.bind('click',function(event) {
alert('Hello yet again!');
});
I guess the below code is doing the same
$('#target')
.click(fun...
Convenient C++ struct initialisation
...g and MSVC.
#include <iostream>
#include <filesystem>
struct hello_world {
const char* hello;
const char* world;
};
int main ()
{
hello_world hw = {
.hello = "hello, ",
.world = "world!"
};
std::cout << hw.hello << hw.world << st...
Execute the setInterval function without delay the first time
...rectly, but you could easily do something like this:
setInterval(function hello() {
console.log('world');
return hello;
}(), 5000);
There's obviously any number of ways of doing this, but that's the most concise way I can think of.
...
Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...类的语言，总是有基本的源程序结构规范。下面以经典的Hello World程序为例，展示一个C语言、DOS汇编...使用MASM
Win32汇编源程序的结构
任何种类的语言，总是有基本的源程序结构规范。
下面以经典的Hello World程序为例，展示...
What is an abstract class in PHP?
...ion prefixValue($prefix);
public function printOut() {
echo "Hello how are you?";
}
}
$obj=new AbstractClass();
$obj->printOut();
//Fatal error: Cannot instantiate abstract class AbstractClass
2. Any class that contains at least one abstract method must also be abstract: Abst...
Reset PHP Array Index
...
The array_values() function [docs] does that:
$a = array(
3 => "Hello",
7 => "Moo",
45 => "America"
);
$b = array_values($a);
print_r($b);
Array
(
[0] => Hello
[1] => Moo
[2] => America
)
...
Escape double quotes in a string
...ou have, or escape the " using backslash.
string test = "He said to me, \"Hello World\" . How are you?";
The string has not changed in either case - there is a single escaped " in it. This is just a way to tell C# that the character is part of the string and not a string terminator.
...
How to invoke the super constructor in Python?
...init__(self):
print "world"
class B(A):
def __init__(self):
print "hello"
super(B, self).__init__()
Python-3.x
class A(object):
def __init__(self):
print("world")
class B(A):
def __init__(self):
print("hello")
super().__init__()
super() is now equivalent to super(<cont...