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Rename MySQL database [duplicate]
...atabase with the database name you wanted.
The short, quick steps without all the above explanation are:
mysqldump -u root -p original_database > original_database.sql
mysql -u root -p -e "create database my_new_database"
mysql -u root -p my_new_database < original_database.sql
mysql -u roo...
How can I beautify JavaScript code using Command Line?
...y-web/js-beautify/blob/master/js/lib/beautify.js
Second, download and install The Mozilla group's Java based Javascript engine, Rhino. "Install" is a little bit misleading; Download the zip file, extract everything, place js.jar in your Java classpath (or Library/Java/Extensions on OS X). You ca...
Can I call a constructor from another constructor (do constructor chaining) in C++?
...legating constructors).
The syntax is slightly different from C#:
class Foo {
public:
Foo(char x, int y) {}
Foo(int y) : Foo('a', y) {}
};
C++03: No
Unfortunately, there's no way to do this in C++03, but there are two ways of simulating this:
You can combine two (or more) constructors v...
Prevent HTML5 video from being downloaded (right-click saved)?
...y to do it is to serve the video using HTTP Live Streaming. What it essentially does is chop up the video into chunks and serve it one after the other. This is how most streaming sites serve video. So even if you manage to Save As, you only save a chunk, not the whole video. It would take a bit more...
What is the difference between a 'closure' and a 'lambda'?
... function definition is re-written as binding a lambda to a variable internally. In other languages, like Python, there are some (rather needless) distinctions between them, but they behave the same way otherwise.
A closure is any function which closes over the environment in which it was defined. ...
How to create file execute mode permissions in Git on Windows?
... would be nice if git-add had a --mode flag
git 2.9.x/2.10 (Q3 2016) actually will allow that (thanks to Edward Thomson):
git add --chmod=+x -- afile
git commit -m"Executable!"
That makes the all process quicker, and works even if core.filemode is set to false.
See commit 4e55ed3 (31 May 2016)...
while (1) Vs. for (;;) Is there a speed difference?
...p
.LCFI0:
movq %rsp, %rbp
.LCFI1:
.L2:
movl $.LC0, %edi
call puts
jmp .L2
.LFE2:
.size t_while, .-t_while
.globl t_for
.type t_for, @function
t_for:
.LFB3:
pushq %rbp
.LCFI2:
movq %rsp, %rbp
.LCFI3:
.L5:
movl $.LC0, %edi
call puts
j...
Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
...
If during the evaluation of an expression, the result is not mathematically defined or not in the range of
representable values for its type, the behavior is undefined. [ Note: most existing implementations of C++
ignore integer overflows. Treatment of division by zero, forming a remainde...
How do I trim a file extension from a String in Java?
...have Apache Commons I/O already in your project, that's right. But if this all you need from it, you're adding (at least) 2.5 MB of dead weight to your project for something that can be easily done with a single line.
– foo
Sep 3 '18 at 9:40
...
How do I clone a Django model instance object and save it to the database?
...
Just change the primary key of your object and run save().
obj = Foo.objects.get(pk=<some_existing_pk>)
obj.pk = None
obj.save()
If you want auto-generated key, set the new key to None.
More on UPDATE/INSERT here.
Official docs on copying model instances: https://docs.djangoproje...