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What version of javac built my jar?
...7. The version information is built in.
http://en.wikipedia.org/wiki/Java_class_file
Note: As mentioned in the comment below,
those bytes tell you what version the class has been compiled FOR, not
what version compiled it.
...
Reading in a JSON File Using Swift
...app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[_NSPlaceholderData initWithContentsOfFile:options:error:]: nil file argument' *** First throw call stack: Any ideas on why this is? For the jsonData options: I put (path, options: NSDataReadingOptions.DataReadingMappedIfSaf...
Process all arguments except the first one (in a bash script)
...
If you want a solution that also works in /bin/sh try
first_arg="$1"
shift
echo First argument: "$first_arg"
echo Remaining arguments: "$@"
shift [n] shifts the positional parameters n times. A shift sets the value of $1 to the value of $2, the value of $2 to the value of $3, and s...
SFTP in Python? (platform independent)
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@user443854 yes there is pysftp.readthedocs.io/en/release_0.2.9/… But I would definitely not recommend that, though you can add another known_host file
– AsTeR
Jul 17 '18 at 8:04
...
How to use a variable inside a regular expression?
...scaped. Only special characters with meaning in a regex are still escaped. _ is not escaped since Python 3.3.(s. here)
Curly braces:
If you want to use quantifiers within the regular expression using f-strings, you have to use double curly braces. Let's say you want to match TEXTO followed by exac...
Find a value in an array of objects in Javascript [duplicate]
...
array.find(x => x.name === 'string 1')
http://exploringjs.com/es6/ch_arrays.html#_searching-for-array-elements
https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/find
To then replace said object (and use another cool ES6 method fill) you could do something li...
Any reason to prefer getClass() over instanceof when generating .equals()?
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@eyalzba Where instanceof_ is used if a subclass added members to the equals contract this would violate the symmetric equality requirement. Using getClass subclasses can never be equal to the parent type. Not that you should be overriding equals an...
Safe (bounds-checked) array lookup in Swift, through optional bindings?
...)
extension Indexable {
public subscript(safe safeIndex: Index) -> _Element? {
return safeIndex.distanceTo(endIndex) > 0 ? self[safeIndex] : nil
}
}
¹: not true, but it gives the idea
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Python strptime() and timezones?
...time module documentation says:
Return a datetime corresponding to date_string, parsed according to format. This is equivalent to datetime(*(time.strptime(date_string, format)[0:6])).
See that [0:6]? That gets you (year, month, day, hour, minute, second). Nothing else. No mention of timezones....
How can I efficiently download a large file using Go?
....Errorf("bad status: %s", resp.Status)
}
// Writer the body to file
_, err = io.Copy(out, resp.Body)
if err != nil {
return err
}
return nil
}
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