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Java logical operator short-circuiting
...he behaviour in a simple example:
public boolean longerThan(String input, int length) {
return input != null && input.length() > length;
}
public boolean longerThan(String input, int length) {
return input != null & input.length() > length;
}
The 2nd version uses the no...
Recursive directory listing in DOS
...ptions offered by FINDSTR. You can also use the excellent unxutils, but it converts the output to UNIX by default, so you no longer get CR+LF; FINDSTR offers the best Windows option.
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How to check if a string contains a substring in Bash
...independent (Bash only!)
For testing strings without care of case, simply convert each string to lower case:
stringContain() {
local _lc=${2,,}
[ -z "$1" ] || { [ -z "${_lc##*${1,,}*}" ] && [ -n "$2" ] ;} ;}
Check:
stringContain 'o "M3' 'echo "my string"' && echo yes || ...
How to create a GUID/UUID in Python
...t; x = uuid.UUID('{00010203-0405-0607-0809-0a0b0c0d0e0f}')
>>> # convert a UUID to a string of hex digits in standard form
>>> str(x)
'00010203-0405-0607-0809-0a0b0c0d0e0f'
>>> # get the raw 16 bytes of the UUID
>>> x.bytes
'\x00\x01\x02\x03\x04\x05\x06\x07\x08\...
How to use subprocess popen Python
...s.popen is being replaced by subprocess.popen, I was wondering how would I convert
3 Answers
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How to remove items from a list while iterating?
...
list(somelist) will convert an iterable into a list. somelist[:] makes a copy of an object that supports slicing. So they don't necessarily do the same thing. In this case I want to make a copy of the somelistobject, so I use [:]
...
Check if a string is a date value
.../ You want to check again for !isNaN(parsedDate) here because Dates can be converted
// to numbers, but a failed Date parse will not.
if (isNaN(date) && !isNaN(parsedDate)) {
/* do your work */
}
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Omitting one Setter/Getter in Lombok
...r, like this:
@Getter(AccessLevel.NONE)
@Setter(AccessLevel.NONE)
private int mySecret;
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How can I make a multipart/form-data POST request using Java?
...ove change in my code, however, I am facing a new issue now - my REST endpoint is not accepting the request. It's expecting the following parameters: ~@PathVariable final String id, @RequestParam("image") final MultipartFile image, @RequestParam("l") final String l, @RequestParam("lo") final...
How to center align the cells of a UICollectionView?
I am currently using UICollectionView for the user interface grid, and it works fine. However, I'd like to be enable horizontal scrolling. The grid supports 8 items per page and when the total number of items are, say 4, this is how the items should be arranged with horizontal scroll direction ena...