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How to declare a type as nullable in TypeScript?
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All fields in JavaScript (and in TypeScript) can have the value null or undefined.
You can make the field optional which is different from nullable.
interface Employee1 {
name: string;
salary: number;
}
var a: Empl...
How to shrink/purge ibdata1 file in MySQL
...ng is a particularly annoying feature of MySQL. The ibdata1 file can't actually be shrunk unless you delete all databases, remove the files and reload a dump.
But you can configure MySQL so that each table, including its indexes, is stored as a separate file. In that way ibdata1 will not grow as la...
Git log to get commits only for a specific branch
I want to list all commits that are only part of a specific branch.
11 Answers
11
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When should I use Inline vs. External Javascript?
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At the time this answer was originally posted (2008), the rule was simple: All script should be external. Both for maintenance and performance.
(Why performance? Because if the code is separate, it can easier be cached by browsers.)
JavaScript doesn't belon...
How do you compare structs for equality in C?
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if the 2 structures variable are initialied with calloc or they are set with 0 by memset so you can compare your 2 structures with memcmp and there is no worry about structure garbage and this will allow you to earn time
– MOHAMED
Oct 3...
Active Record - Find records which were created_at before today
I want to get all records where the created_at field is less than today (a date).
Is there anything like:
4 Answers
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List All Redis Databases
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Or you can just run the following command and you will see all databases of the Redis instance without firing up redis-cli:
$ redis-cli INFO | grep ^db
db0:keys=1500,expires=2
db1:keys=200000,expires=1
db2:keys=350003,expires=1
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How do you remove all the options of a select box and then add one option and select it with jQuery?
Using core jQuery, how do you remove all the options of a select box, then add one option and select it?
24 Answers
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How to have Emacs auto-refresh all buffers when files have changed on disk?
...an my emacs buffers (en masse). Is there any way to tell emacs to refresh all the buffers from disk in one fell swoop, instead of having to do each one individually by reloading the file?
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How to list of all the tables defined for the database when using active record?
How do I get a list of all the tables defined for the database when using active record?
5 Answers
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