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When should I use Lazy?
...erties for Name, PhoneNumber, and Orders. Name and PhoneNumber are regular strings but Orders is a navigation property that returns a list of every order the customer ever made.
You often might want to go through all your customer's and get their name and phone number to call them. This is a very q...
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...a number being inserted into a varchar or text field, but inserting a text string into a field with a numeric data type would result in bad data.
– codewaggle
Dec 18 '12 at 11:02
2...
Get User's Current Location / Coordinates
...list file
<key>NSLocationWhenInUseUsageDescription</key>
<string>Description</string>
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>Description</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>Descrip...
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
... in Visual Studio 2017 see the end of this answer)
Consider this code:
String s = null;
Console.WriteLine(s.Length);
This will throw a NullReferenceException in the second line and you want to know why .NET doesn't tell you that it was s that was null when the exception was thrown.
To underst...
Sending multipart/formdata with jQuery.ajax
...g jQuery not to add a Content-Type header for you, otherwise, the boundary string will be missing from it.
Also, you must leave the processData flag set to false, otherwise, jQuery will try to convert your FormData into a string, which will fail.
You may now retrieve the file in PHP using:
$_FILES...
How to pass event as argument to an inline event handler in JavaScript?
...ating data binding capabilities available in mainstream js frameworks. One extra trick is to do something similar to Object.assign(this.querySelector('my-btn'), this) inside a web component and voila, data binding. You can access any method of the parent web component class from the inline events on...
Python Regex - How to Get Positions and Values of Matches
...es using the re module? For example given the pattern r'[a-z]' and the string 'a1b2c3d4' I'd want to get the positions where it finds each letter. Ideally, I'd like to get the text of the match back too.
...
Fetch the row which has the Max value for a column
...Y User)
EDIT: Just tried it for real:
SQL> create table MyTable (usr char(1), dt date);
SQL> insert into mytable values ('A','01-JAN-2009');
SQL> insert into mytable values ('B','01-JAN-2009');
SQL> insert into mytable values ('A', '31-DEC-2008');
SQL> insert into mytable values ('...
What is Data Transfer Object?
...
In general Value Objects should be Immutable. Like Integer or String objects in Java. We can use them for transferring data between software layers. If the software layers or services running in different remote nodes like in a microservices environment or in a legacy Java Enterprise Ap...
Should flux stores, or actions (or both) touch external services?
...truth.
In every Flux implementation I've seen Actions are basically event strings turned into objects, like traditionally you'd have an event named "anchor:clicked" but in Flux it would be defined as AnchorActions.Clicked. They're even so "dumb" that most implementations have separate Dispatcher ob...