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Enforcing the type of the indexed members of a Typescript object?
...lt;K, T>, f: (x: T) => U): Record<K, U>
const names = { foo: "hello", bar: "world", baz: "bye" };
const lengths = mapObject(names, s => s.length); // { foo: number, bar: number, baz: number }
TypeScript 2.1 Documentation on Record<T, K>
The only disadvantage I see to using th...
Sorting Python list based on the length of the string
... a[i] = a[j]
a[j] = temp
return a
print lensort(["hello","bye","good"])
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Stop setInterval
...ion intervalFunc() {
count++;
console.log(count);
console.log('hello boy');
if (count == 10) {
clearInterval(this);
}
}
setInterval(vary, 1500);
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What does the '.' (dot or period) in a Go import statement do?
...de that reproduces the issue? (I tried to do it myself, compiling a simple hello-world program with import "fmt" vs import . "fmt", but in both cases it was the same size for me.)
– Attilio
May 7 '19 at 13:33
...
Constants in Objective-C
...gConsts.h>
STR_CONST(MyConst, "Lorem Ipsum");
STR_CONST(MyOtherConst, "Hello world");
// myfile.m
#define SYNTHESIZE_CONSTS
#import "myfile.h"
et voila, I have all the information about the constants in .h file only.
...
Python: Get the first character of the first string in a list?
...Get the first character of a bare python string:
>>> mystring = "hello"
>>> print(mystring[0])
h
>>> print(mystring[:1])
h
>>> print(mystring[3])
l
>>> print(mystring[-1])
o
>>> print(mystring[2:3])
l
>>> print(mystring[2:4])
ll
Get t...
How to check if an email address exists without sending an email?
... for unsolicited electronic mail advertisements.
helo hi
250 Postini says hello back
mail from: <me@myhost.com>
250 Ok
rcpt to: <fake@stackoverflow.com>
550-5.1.1 The email account that you tried to reach does not exist. Please try
550-5.1.1 double-checking the recipient's email addre...
No secret option provided to Rack::Session::Cookie warning?
...
rails 3.2.9 - ruby 1.9.3p125 (2012-02-16 revision 34643) [i686-linux]
Hello everyone, the following has worked for me, it may work for you.
/usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.2.9/lib/action_dispatch/middleware/session/abstract_store.rb
module Compatibility
def initiali...
What is the “-d” in “npm -d install”?
...
Hello yup that's why I mentioned that -d force to install npm locally some times npm gets little wired so -d had helped me a lot to do the thing. In the other hand the link that you tagged does not contain the difference of -...
Decorators with parameters?
...ing_multiply(text, times):
return text * times
print(string_multiply('hello', 3)) # Prints hellohellohello
print(string_multiply(3, 3)) # Fails miserably with TypeError
A final note: here I'm not using functools.wraps for the wrapper functions, but I would recommend using it all ...