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How to declare a type as nullable in TypeScript?
...ld optional which is different from nullable.
interface Employee1 {
name: string;
salary: number;
}
var a: Employee1 = { name: 'Bob', salary: 40000 }; // OK
var b: Employee1 = { name: 'Bob' }; // Not OK, you must have 'salary'
var c: Employee1 = { name: 'Bob', salary: undefined }; // OK
va...
How do I move a redis database from one server to another?
...er running BGSAVE or SAVE from the command line. This will create a file named dump.rdb in the same folder as your redis server. See a list of all server commands.
Copy this dump.rdb to the other redis server you want to migrate to. When redis starts up, it looks for this file to initialize the dat...
How to “pretty” format JSON output in Ruby on Rails
...at you should give an answer which includes code that can be used in the same context as format.json { render :json => @whatever }
– iconoclast
Sep 20 '11 at 1:25
10
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How to return a string value from a Bash function
...-f : you have to be really careful on what you have in this function "getSomeString()" as having any code which will eventually echo will mean that you get incorrect return string.
– Mani
Sep 14 '12 at 16:38
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Receiver not registered exception error?
...ng an error that I cannot reproduce on any phone I have. One person left a message saying he gets it when they try to open the settings screen of my battery service. As you can see from the error it says that the receiver is not registered.
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How to check if a string “StartsWith” another string?
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You can use ECMAScript 6's String.prototype.startsWith() method, but it's not yet supported in all browsers. You'll want to use a shim/polyfill to add it on browsers that don't support it. Creating an implementation that complies with all the details laid out in the spec is a littl...
php $_POST array empty upon form submission
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I know this question was about POST via a Form, but came here looking for answers for similar issue when POSTing with JSON content-type. Found the answer and wanted to share it as it cost me much time.
When using JSON content-type the $_POST array will not populate (only with m...
Can you have multiline HTML5 placeholder text in a ?
... browser.
User agents should present this hint to the user when the element's value is the empty string and the control is not focused (e.g. by displaying it inside a blank unfocused control). All U+000D CARRIAGE RETURN U+000A LINE FEED character pairs (CRLF) in the hint, as well as all other U+...
form with no action and where enter does not reload page
...uery $().submit(fn)), and return false unless your specific conditions are met.
Unless you don't want the form to submit, ever - in which case, why not just leave out the 'action' attribute on the form element?
share
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How to extract numbers from a string in Python?
... the better suited for the purpose, regular expressions or the isdigit() method?
17 Answers
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