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How to replace a character with a newline in Emacs?
...m trying to replace a character - say ; - with a new line using replace-string and/or replace-regexp in Emacs.
6 Answ...
Prompt for user input in PowerShell
...
Read-Host is a simple option for getting string input from a user.
$name = Read-Host 'What is your username?'
To hide passwords you can use:
$pass = Read-Host 'What is your password?' -AsSecureString
To convert the password to plain text:
[Runtime.InteropServ...
Is there a difference between /\s/g and /\s+/g?
When we have a string that contains space characters:
4 Answers
4
...
What is the !! (not not) operator in JavaScript?
...1/0) === true // Infinity is truthy
!!"" === false // empty string is falsy
!!"foo" === true // non-empty string is truthy
!!"false" === true // ...even if it contains a falsy value
!!window.foo === false // undefined is falsy
!!null === false // n...
How to negate the whole regex?
...ow do I convert CamelCase into human-readable names in Java?
Regex for all strings not containing a string?
A regex to match a substring that isn’t followed by a certain other substring.
More examples
These are attempts to come up with regex solutions to toy problems as exercises; they should b...
#1071 - Specified key was too long; max key length is 1000 bytes
...e best practice is to use prefix indexes so you're only indexing a left substring of the data. Most of your data will be a lot shorter than 255 characters anyway.
You can declare a prefix length per column as you define the index. For example:
...
KEY `index` (`parent_menu_id`,`menu_link`(50),`p...
runOnUiThread in fragment
...t hour_sdf = new SimpleDateFormat("HH:mm a");
String currentDate = date_sdf.format(currentTime);
String currentHour = hour_sdf.format(currentTime);
dateTextView.setText(currentDate);
hou...
mongoDB/mongoose: unique if not null
...the sparse option to true when defining the index. As in:
email : {type: String, trim: true, index: true, unique: true, sparse: true}
Or in the shell:
db.users.ensureIndex({email: 1}, {unique: true, sparse: true});
Note that a unique, sparse index still does not allow multiple docs with an em...
Copy text to clipboard with iOS
...-C
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
pasteboard.string = @"Paste me!";
Swift 2.2
let pasteBoard = UIPasteboard.generalPasteboard()
pasteBoard.string = "Paste me!"
Swift 3+:
let pasteBoard = UIPasteboard.general
pasteBoard.string = "Paste me!"
...
Declaring abstract method in TypeScript
... officially live.
abstract class Animal {
constructor(protected name: string) { }
abstract makeSound(input : string) : string;
move(meters) {
alert(this.name + " moved " + meters + "m.");
}
}
class Snake extends Animal {
constructor(name: string) { super(name); }
...