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How do SQL EXISTS statements work?
...M student WHERE EXISTS (SELECT 1 FROM student WHERE student.id > 1). I know what I wrote could be achieved by one simple WHERE query but I was just using it to understand EXISTS. I got all the rows. Is it indeed due to the fact that I didn't use correlated subquery? Thanks.
–...
Using PHP with Socket.io
...de stuff and let it be with the connections it has no place in this domain now. Why do anything long-polling when you have websockets or flashsockets.
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What are the options for storing hierarchical data in a relational database? [closed]
...ierarchy and use Nested Sets to query the hierarchy.
The problem up until now has been that the coversion method from an Adjacecy List to Nested Sets has been frightfully slow because most people use the extreme RBAR method known as a "Push Stack" to do the conversion and has been considered to be ...
TFS Get Specific Version into separate folder
...ver to this new workspace and do a Get Specific Version here.
Makes sense now, I just hadn't ever tried that.
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Check if an apt-get package is installed and then install it if it's not on Linux
...recently discovered that dpkg-query used to return 1 on a missing package, now ( Ubuntu 12.04 ) returns 0, causing all sorts of trouble on my jenkins build node setup script! dpkg -s returns 0 on package installed, and 1 on package not installed.
– Therealstubot
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How to specify an array of objects as a parameter or return value in JSDoc?
...array of objects:
/**
* @param {Object[]} myArray
*/
EDIT
In case you know the keys and the variable type of the values you can also do:
/**
* @param {Array.<{myNumber: Number, myString: String, myArray: Array}>} myObjects
*/
or
/**
* @param {{myNumber: Number, myString: String, myArra...
Passing enum or object through an intent (the best solution)
...ass).from(intent);
OPTION 3 (with Kotlin):
It's been a while, but since now we have Kotlin, I thought I would add another option for the new paradigm. Here we can make use of extension functions and reified types (which retains the type when compiling).
inline fun <reified T : Enum<T>&g...
What is the best way to implement constants in Java? [closed]
... big bad hack), because the constructor of the subclass needs to call the (now private) constructor of its superclass. So, marking it final is unnecessary (but perhaps more explicit).
– import this
Nov 4 '14 at 16:56
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Verify if a point is Land or Water in Google Maps
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Thanks - I have already checked it - I did not know that the types are turning Sea Lake Ocean and the likes, and like you pointed in your edit - natural_feature would also be a mountain, an island, and a desert .. Can you maybe point to a documentation ? also - how can you...
Can I set subject/content of email using mailto:?
...y. Enter the strings you want and you'll instantly get the mailto:
mailto.now.sh
????⚡️ Template full emails in a mailto
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