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How does the following LINQ statement work?
...execution.
The query is actually executed when the query variable
is iterated over, not when the query variable is created.
This is called deferred execution.
-- Suprotim Agarwal, "Deferred vs Immediate Query Execution in LINQ"
There is another execution called Immediate Query Execut...
Can table columns with a Foreign Key be NULL?
...the constraint only when the value is not NULL. This can be easily tested with the following example:
CREATE DATABASE t;
USE t;
CREATE TABLE parent (id INT NOT NULL,
PRIMARY KEY (id)
) ENGINE=INNODB;
CREATE TABLE child (id INT NULL,
parent_id INT NULL,
...
How to kill all processes with a given partial name? [closed]
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edited Dec 14 '13 at 16:50
John Kugelman
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How to get the first five character of a String
...stFivChar = new string(yourStringVariable.Take(5).ToArray());
The plus with the approach is not checking for length before hand.
The other way is to use String.Substring with error checking
like:
string firstFivCharWithSubString =
!String.IsNullOrWhiteSpace(yourStringVariable) &&am...
Difference between HTTP redirect codes
... spec when they encounter a 302. For temporary redirects, you should use either 303 or 307, depending on what type of behavior you want on non-GET requests. Prefer 307 to 303 unless you need the alternate behavior on POST/PUT/DELETE.
...
How to load images dynamically (or lazily) when users scrolls them into view
I've noticed this in numerous "modern" websites (e.g. facebook and google image search) where the images below the fold load only when user scrolls down the page enough to bring them inside the visible viewport region ( upon view source, the page shows X number of <img> tags but they are not f...
JSON.net: how to deserialize without using the default constructor?
... i need the default constructor for other purposes so i would like to keep it if i can.
5 Answers
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How do I pass a class as a parameter in Java?
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edited May 3 '16 at 4:37
Mark Cramer
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Python strptime() and timezones?
...o time.strptime doesn't work but if you strip off the " %Z" and the " EST" it does work. Also using "UTC" or "GMT" instead of "EST" works. "PST" and "MEZ" don't work. Puzzling.
It's worth noting this has been updated as of version 3.2 and the same documentation now also states the following:
Wh...
How to round the corners of a button
I have a rectangle image (jpg) and want to use it to fill the background of a button with rounded corner in xcode.
15 Answe...