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What's the $unwind operator in MongoDB?
...nds array produce an output document. Now, in this example, our values are strings. But, regardless of the type of value for the elements in an array, unwind will produce an output document for each one of these values, such that the field in question will have just that element. In the case of fund...
Array initializing in Scala
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scala> val arr = Array("Hello","World")
arr: Array[java.lang.String] = Array(Hello, World)
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MySQL CONCAT returns NULL if any field contain NULL
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convert the NULL values with empty string by wrapping it in COALESCE
SELECT CONCAT(COALESCE(`affiliate_name`,''),'-',COALESCE(`model`,''),'-',COALESCE(`ip`,''),'-',COALESCE(`os_type`,''),'-',COALESCE(`os_version`,'')) AS device_name
FROM devices
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Catching “Maximum request length exceeded”
...s ago, but I still want to ask whether this worked fine till now? does the string comparison of 'GetEntireRawContent' work fine? I don't think this is a timeout issue. is there anyone standing out for pointing me to uncloudy somewhere regarding this?
– Elaine
M...
How To Create Table with Identity Column
...nsert into teppp ( addresss) values ('address3')
select * from teppp
null string , address1
NULL,address2
NULL,address3
If you try inserting same values as below:
insert into teppp ( name,addresss) values ('','address4')
insert into teppp ( name,addresss) values ('NULL','address5')
insert into t...
How to send FormData objects with Ajax-requests in jQuery? [duplicate]
...s you prevent jQuery from automatically transforming the data into a query string. See the docs for more info.
Setting the contentType to false is imperative, since otherwise jQuery will set it incorrectly.
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What arguments are passed into AsyncTask?
... will I write the code for DownloadTask?
DownloadTask extends AsyncTask<String,Integer,String>{
@Override
public void onPreExecute()
{}
@Override
public String doInbackGround(String... params)
{
// Download code
int downloadPe...
Disabling implicit animations in -[CALayer setNeedsDisplayInRect:]
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There are actually constants for these 'special' strings not representing a property (e.g. kCAOnOrderOut for @"onOrderOut") well-documented here: developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/…
– Patrick Pijnappel
A...
How to check if a specific key is present in a hash or not?
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nice: "string" accessor works for JSON.parse parsed objects, too :)
– Bijan
Aug 8 '16 at 14:32
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Is there any standard for JSON API response format?
... a field called messages which is an array of messages instead of a single string.
– StockBreak
May 29 '15 at 12:45
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