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What is choice_set in this Django app tutorial?
...ou declared in the model.
Django's ORM follows the relationship backwards from Question too, automatically generating a field on each instance called foo_set where Foo is the model with a ForeignKey field to that model.
choice_set is a RelatedManager which can create querysets of Choice objects wh...
How to check if string input is a number? [duplicate]
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@PeterR I think this works if you convert from a string.
– arhuaco
Mar 5 '15 at 8:17
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What is the difference between #include and #include “filename”?
...rce file is "searched for in an implementation-defined manner". See answer from piCookie.
– Richard Corden
Sep 17 '08 at 13:41
63
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Regular expression to allow spaces between words
...allow accidental double-spaces, or if you're working with copy-pasted text from a PDF), then add a + after the space:
^\w+( +\w+)*$
If you want to allow tabs and newlines (whitespace characters), then replace the space with a \s+:
^\w+(\s+\w+)*$
Here I suggest the + by default because, for exam...
Express command not found
...search, I learned that one has to read every available resource especially from the parent source [in this case EXPRESSJS.COM]. Here is a quick fix.
Beginning with version 4.0+ you don't necessarily need to install express-generator if you are running Node 8.2+. Simply run
npx express-generator
...
The most accurate way to check JS object's type?
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|| (cache[key] = key.slice(8, -1).toLowerCase()); // get XXXX from [object XXXX], and cache it
};
}(this));
use as:
type(function(){}); // -> "function"
type([1, 2, 3]); // -> "array"
type(new Date()); // -> "date"
type({}); // -> "object"
...
How to pass JVM options from bootRun
...temProperties instead of jvmArgs
If you want to conditionally add jvmArgs from the command line you can do the following:
bootRun {
if ( project.hasProperty('jvmArgs') ) {
jvmArgs project.jvmArgs.split('\\s+')
}
}
gradle bootRun -PjvmArgs="-Dwhatever1=value1 -Dwhatever2=value2"
...
In PHP, what is a closure and why does it use the “use” identifier?
...e's value changes.
Variables defined inside the closure are not accessible from outside the closure either.
Closures and functions have the same speed. Yes, you can use them all over your scripts.
As @Mytskine pointed out probably the best in-depth explanation is the RFC for closures. (Upvote him ...
How to avoid annoying error “declared and not used”
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Still, this is not so different from going commenting it out. And, I understand that this is for better code but would it be better if we can close a check why testing on our code and then open this check again after we want to finish the code and make it c...
How do I create an empty array in YAML?
...] or {} structures, which is a major incompatibility with JSON (copy-paste from Wikipedia) Cheers
– olibre
Feb 12 '13 at 10:51
2
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