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Python truncate a long string
...rds plus the placeholder fit within width:
>>> textwrap.shorten("Hello world!", width=12)
'Hello world!'
>>> textwrap.shorten("Hello world!", width=11)
'Hello [...]'
>>> textwrap.shorten("Hello world", width=10, placeholder="...")
'Hello...'
...
Pass variables to Ruby script via command line
... line and enter the value of N:
N = gets; 1.step(N.to_i, 1) { |i| print "hello world\n" }
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Pass a JavaScript function as parameter
...
// refreshCallback(id);
}
function refreshContactList() {
alert('Hello World');
}
addContact(1, refreshContactList);
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String to object in JS
...n
JSON.parse(text[, reviver]);
Examples:
1)
var myobj = JSON.parse('{ "hello":"world" }');
alert(myobj.hello); // 'world'
2)
var myobj = JSON.parse(JSON.stringify({
hello: "world"
});
alert(myobj.hello); // 'world'
3)
Passing a function to JSON
var obj = {
hello: "World",
sayHe...
Rest with Express.js nested router
...s route
This will result in following possible routes:
GET /user -> hello user
GET /user/5 -> hello user 5
GET /user/5/items -> hello items from user 5
GET /user/5/items/6 -> hello item 6 from user 5
var express = require('express');
var app = express();
var userRouter = express....
Shell Script: Execute a python program from within a shell script
... by running python --version, and you can enforce the version with python3 hello.py.
– Jean-Bernard Jansen
Dec 16 '16 at 10:58
...
ruby inheritance vs mixins
...re that nobody has mentioned: namespace collisions. Consider:
module A
HELLO = "hi"
def sayhi
puts HELLO
end
end
module B
HELLO = "you stink"
def sayhi
puts HELLO
end
end
class C
include A
include B
end
c = C.new
c.sayhi
Which one wins? In Ruby, it turns out the be th...
How to make a chain of function decorators?
...gs, **kwargs) + "</i>"
return wrapped
@makebold
@makeitalic
def hello():
return "hello world"
@makebold
@makeitalic
def log(s):
return s
print hello() # returns "<b><i>hello world</i></b>"
print hello.__name__ # with functools.wraps() this returns ...
When should I use malloc in C and when don't I?
...
char *some_memory = "Hello World";
is creating a pointer to a string constant. That means the string "Hello World" will be somewhere in the read-only part of the memory and you just have a pointer to it. You can use the string as read-only. You...
awk without printing newline
...ty ORS or using printf.
Using an empty ORS
awk -v ORS= '1' <<< "hello
man"
This returns "helloman", all together.
The problem here is that not all awks accept setting an empty ORS, so you probably have to set another record separator.
awk -v ORS="-" '{print ...}' file
For example:
...