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Is the primary key automatically indexed in MySQL?
...
I guess this is the answer
mysql> create table test(id int primary key, s varchar(20));
Query OK, 0 rows affected (0.06 sec)
mysql> show indexes from test \G
*************************** 1. row ***************************
Table: test
Non_uni...
What data is stored in Ephemeral Storage of Amazon EC2 instance?
...eboots.
If you are not sure what type of volume you have, look under EC2->Elastic Block Store->Volumes in your AWS console and if your AMI root volume is listed there then you are safe. Also, if you go to EC2->Instances and then look under column "Root device type" of your instance and if ...
Is it better in C++ to pass by value or pass by constant reference?
... sure that it is worth to pass by ref. double-s
– sergtk
Nov 6 '08 at 22:11
3
As usual, boost hel...
Android Studio: Where is the Compiler Error Output Window?
... have an error. You can also open the compiler settings by going to File -> Settings -> Compiler. (Thanx to @maxgalbu for this tip).
Uncheck "Use External build"
And you will see the errors in the console
EDIT: After returning to "internal build" again you may get some errors, you can s...
Intelli J IDEA takes forever to update indices
...
the easier way is as follow:
file --> settings --> (uncheck) Synchronize files on frame or editor tab activation.
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How to convert Set to Array?
...g to a new array (Sets do have forEach)
let array = [];
mySet.forEach(v => array.push(v));
Previously, using the non-standard, and now deprecated array comprehension syntax:
let array = [v for (v of mySet)];
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Creating an Android trial application that expires after a fixed time period
...) - before.getTime();
long days = diff / ONE_DAY;
if(days > 30) { // More than 30 days?
// Expired !!!
}
}
...
}
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“Large data” work flows using pandas
...ts of rows (records) based on criteria (e.g. select the rows with field A > 5)? and then do something, or do you just select fields A, B, C with all of the records (and then do something)?
Do you 'work on' all of your columns (in groups), or are there a good proportion that you may only use for r...
pass **kwargs argument to another function with **kwargs
...an by expanded to keywords by prefixing it with ** during function call." <- thats cool
– user945967
Mar 26 '12 at 6:51
1
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new Date() works differently in Chrome and Firefox
... reliable parsed by every browser - the ISO format is not recognised by IE<8 (see JavaScript: Which browsers support parsing of ISO-8601 Date String with Date.parse). Better, use a unix timestamp, i.e. milliseconds since unix epoch, or use a regular expression to break the string down in its part...