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How to declare a type as nullable in TypeScript?
...Union type is in my mind best option in this case:
interface Employee{
id: number;
name: string;
salary: number | null;
}
// Both cases are valid
let employe1: Employee = { id: 1, name: 'John', salary: 100 };
let employe2: Employee = { id: 1, name: 'John', salary: null };
EDIT : For thi...
Android, How to limit width of TextView (and add three dots at the end of text)?
...
Deprecated:
Add one more property android:singleLine="true" in your Textview
Updated:
android:ellipsize="end"
android:maxLines="1"
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Getting thread id of current method call
Is there a way to print out the current thread id on which the current method is executing on?
6 Answers
...
What are the differences between the different saving methods in Hibernate?
...OrUpdate
Calls either save or update depending on some checks. E.g. if no identifier exists, save is called. Otherwise update is called.
save
Persists an entity. Will assign an identifier if one doesn't exist. If one does, it's essentially doing an update. Returns the generated ID of the entit...
SQL order string as number
...the result is 0 */
'123miles' | 123
'$123' | 0 /* the left side of the string does not start with a number */
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Delete a key from a MongoDB document using Mongoose
...s. So you can do the action in question by this:
User.collection.update({_id: user._id}, {$unset: {field: 1 }});
Since version 2.0 you can do:
User.update({_id: user._id}, {$unset: {field: 1 }}, callback);
And since version 2.4, if you have an instance of a model already you can do:
doc.field...
Convert timestamp to date in MySQL query
...SQL
Make the table with an integer timestamp:
mysql> create table foo(id INT, mytimestamp INT(11));
Query OK, 0 rows affected (0.02 sec)
Insert some values
mysql> insert into foo values(1, 1381262848);
Query OK, 1 row affected (0.01 sec)
Take a look
mysql> select * from foo;
+------...
AngularJS passing data to $http.get request
...er. However, you can add a query string to the request.
angular.http provides an option for it called params.
$http({
url: user.details_path,
method: "GET",
params: {user_id: user.id}
});
See: http://docs.angularjs.org/api/ng.$http#get and https://docs.angularjs.org/api/ng/service...
Validate that a string is a positive integer
... Infinity && String(n) === str && n >= 0;
}
function gid(id) {
return document.getElementById(id);
}
function test(str, expect) {
var result = isNormalInteger(str);
console.log(
str + ": " +
(result ? "Yes" : "No") +
(expect === undefi...
Add Foreign Key to existing table
...
To add a foreign key (grade_id) to an existing table (users), follow the following steps:
ALTER TABLE users ADD grade_id SMALLINT UNSIGNED NOT NULL DEFAULT 0;
ALTER TABLE users ADD CONSTRAINT fk_grade_id FOREIGN KEY (grade_id) REFERENCES grades(id);
...