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How to get an enum value from a string value in Java?
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@treesAreEverywhere More specifically, those methods are generated (or synthesized) by the compiler. The actual enum Blah {...} definition shouldn't try to declare its own values nor valuesOf. It's like how you can write "AnyTypeName.class" even though you...
cartesian product in pandas
...n unused column name, then add dummy columns with that name, merge, and finally drop the column on the result? Creating, as opposed to reading, data with pandas is just a pain
– Bananach
Oct 10 '19 at 7:31
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Why is Go so slow (compared to Java)?
...n spends runtime supporting language features that the benchmark doesn't really need. In most compiled languages a sufficiently clever compiler could in theory strip out what isn't needed, but there comes a point where you're rigging the demo, since very few real users of the language would write pr...
How to programmatically set style attribute in a view
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Generally you can't change styles programmatically; you can set the look of a screen, or part of a layout, or individual button in your XML layout using themes or styles. Themes can, however, be applied programmatically.
There i...
Creating anonymous objects in php
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This is interesting but it doesn't really address the question, as the OP was asking about a convenient way to initialise an object with various members without creating a class. I am not sure whether anonymous classes in php can be used to do that, and if it ca...
How should I validate an e-mail address?
...ache.commons.validator.routines.EmailValidator)
(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-...
Default value in Doctrine
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I use both this and the accepted answer to cover all bases. Also just a note that you can also do: options={"default": 0} Be careful to use " and not ', as it causes errors in my version of doctrine.
– Scott Flack
Jun 17 '14 at 7:37
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Build the full path filename in Python
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This works fine:
os.path.join(dir_name, base_filename + "." + filename_suffix)
Keep in mind that os.path.join() exists only because different operating systems use different path separator characters. It smooths over that difference so cross-platform code d...
Asynchronous Process inside a javascript for loop [duplicate]
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The for loop runs immediately to completion while all your asynchronous operations are started. When they complete some time in the future and call their callbacks, the value of your loop index variable i will be at its last value for all the callbacks.
This is because t...
How to get all properties values of a JavaScript Object (without knowing the keys)?
... for you:
for (var key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
var val = obj[key];
// use val
}
}
The nested if makes sure that you don't enumerate over properties in the prototype chain of the object (which is the behaviour you almost certainly wan...