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Does a foreign key automatically create an index?
...e believing this to be true, but can't find much out there related specifically to this.
10 Answers
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“for loop” with two variables? [duplicate]
... the request for "a function that will read lists "t1" and "t2" and return all elements that are identical", I don't think the OP wants zip or product. I think they want a set:
def equal_elements(t1, t2):
return list(set(t1).intersection(set(t2)))
# You could also do
# return list(set(...
How to escape text for regular expression in Java
... may lead to unexpected results, for example Pattern.quote("*.wav").replaceAll("*",".*") will result in \Q.*.wav\E and not .*\.wav, as you might expect.
– Matthias Ronge
Jan 16 '13 at 13:27
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'id' is a bad variable name in Python
... keyword or built-in function in any language is a bad idea, even if it is allowed.
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How to convert object array to string array in Java
...s a work of beauty and satisfies the requirement of being able to aesthetically convert a non-String object array to an array of their toString equivalents. The currently accepted answer does not accomplish this.
– b4n4n4p4nd4
Jan 11 '18 at 21:34
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Is there a Python equivalent of the C# null-coalescing operator?
In C# there's a null-coalescing operator (written as ?? ) that allows for easy (short) null checking during assignment:
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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...
What is Type-safe?
...m:
int AddTwoNumbers(int a, int b)
{
return a + b;
}
If I tried to call that using:
int Sum = AddTwoNumbers(5, "5");
The compiler would throw an error, because I am passing a string ("5"), and it is expecting an integer.
In a loosely typed language, such as javascript, I can do the follow...
jQuery document.createElement equivalent?
...s a way of creating new elements, and which is "best".
I put together a small benchmark, and here are roughly the results of repeating the above options 100,000 times:
jQuery 1.4, 1.5, 1.6
Chrome 11 Firefox 4 IE9
<div> 440ms 640ms 460ms
<div></d...
How to create a project from existing source in Eclipse and then find it?
I have created several .java files. All of them are located in one directory. I used a text editor to write these files. Now I want to switch to Eclipse. How can I do it? I have tried many ways. None of them works.
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