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How to remove all null elements from a ArrayList or String Array?
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Try:
tourists.removeAll(Collections.singleton(null));
Read the Java API. The code will throw java.lang.UnsupportedOperationException for immutable lists (such as created with Arrays.asList); see this answer for more details.
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Build the full path filename in Python
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@wontleave: If a filename already has a suffix, with_suffix() will substitute it instead of appending. You want something like Path(dirname, filename2 + suffix)
– Eugene Yarmash
Jun 28 '19 at 8:46
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Java Equivalent of C# async/await?
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@rozar: No, not really. There are already multiple options for asynchrony - but RxJava doesn't change the language in the way that C# did. I have nothing against Rx, but it's not the same thing as async in C# 5.
– Jon Skeet
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How to access data/data folder in Android device?
...t's best NOT to provide a password, otherwise it becomes more difficult to read the data. Just click on 'backup my data'. The resulting 'backup.ab' file on your computer contains all application data in android backup format. Basically it's a compressed tar file. This page explains how you can use O...
How do I execute any command editing its file (argument) “in place” using bash?
...txt
Specifically, the documentation of GNU sort says:
Normally, sort reads all input before opening output-file, so you can safely sort a file in place by using commands like sort -o F F and cat F | sort -o F. However, sort with --merge (-m) can open the output file before reading all input, s...
how to use javascript Object.defineProperty
...e the example above)
get must be a function; its return value is used in reading the property; if not specified, the default is undefined, which behaves like a function that returns undefined
set must be a function; its parameter is filled with RHS in assigning a value to property; if not specifie...
What XML parser should I use in C++? [closed]
... so you need to process XML. Not toy XML, real XML. You need to be able to read and write all of the XML specification, not just the low-lying, easy-to-parse bits. You need Namespaces, DocTypes, entity substitution, the works. The W3C XML Specification, in its entirety.
The next question is: Does yo...
How to retrieve the first word of the output of a command in bash?
... retrieve any word. Index runs from 0 to length-1
Also, you can directly read arrays in a pipe-line:
echo "word1 word2" | while read -a array; do echo "${array[0]}" ; done
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How to check null objects in jQuery
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but.. wouldnt you get a "Cannot read property 'length' of null" error?
– Sagive SEO
Mar 25 '18 at 18:14
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Check if at least two out of three booleans are true
...k if this was a real-world requirement (with real variable names) it would read pretty well. Consider return hasGoodAttendance ? (passedCoursework || passed Exam) : (passedCoursework && passedExam), that looks fine to me.
– Andrzej Doyle
Jun 19 '10 at ...