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How does the const constructor actually work?
...a nice performance win for Flutter widgets according to medium.com/@mehmetf_71205/inheriting-widgets-b7ac56dbbeb1 "Use const to build your widgets Without const, selective rebuilding of the sub-tree does not happen. Flutter creates a new instance of each widget in the sub-tree and calls build() was...
if else in a list comprehension [duplicate]
...ple extracting objects with a specific condition (name in this example) var_list = [v for v in tf.all_variables() if v.name == 'C:0']
– Charlie Parker
Jul 25 '16 at 16:50
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How do I restore a dump file from mysqldump?
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It should be as simple as running this:
mysql -u <user> -p < db_backup.dump
If the dump is of a single database you may have to add a line at the top of the file:
USE <database-name-here>;
If it was a dump of many databases, the use statements are already in there.
To run the...
How to use the 'main' parameter in package.json?
...r example multiple CLI commands (during development accessible under ./node_modules/.bin/<symlink>) check out the "bin" parameter.
– Frank Nocke
Oct 9 '18 at 13:09
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Mockito. Verify method arguments
...ckito.verify(mock).mymethod(null);
Mockito.verify(mock).mymethod("something_else");
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How to remove item from array by value? [duplicate]
....js. It really makes things simple.
For example, with this:
var result = _.without(['three','seven','eleven'], 'seven');
And result will be ['three','eleven'].
In your case the code that you will have to write is:
ary = _.without(ary, 'seven')
It reduces the code that you write.
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Effects of changing Django's SECRET_KEY
I made a mistake and committed my Django project's SECRET_KEY into a public repository.
5 Answers
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Is there a portable way to print a message from the C preprocessor?
...pragma message" and "warning" somehow? For example, something like: #ifdef _LINUX #define #preprocmsg "#warning" else #define #preprocmsg "#pragma message"... I'll have to try that but instinct tells me the answer is no.
– Bryan
Sep 30 '10 at 0:41
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What's the difference between comma separated joins and join on syntax in MySQL? [duplicate]
... in the joins and some in the where clause.
– wobbily_col
Sep 14 '15 at 11:05
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How do I create a basic UIButton programmatically?
...height: 500)
myButton.addTarget(self, action: #selector(pressedAction(_:)), for: .touchUpInside)
self.view.addSubview( myButton)
func pressedAction(_ sender: UIButton) {
// do your stuff here
print("you clicked on button \(sender.tag)")
}
SwiftUI
for example you get the step by ...