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When do you use map vs flatMap in RxJava?
...n problem, just throw it with a Non checked exception : RX will call the onError handler for you.
Observable.from(jsonFile).map(new Func1<File, String>() {
@Override public String call(File file) {
try {
return new Gson().toJson(new FileReader(file), Object.class);
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Send email using the GMail SMTP server from a PHP page
...g to send an email via GMail's SMTP server from a PHP page, but I get this error:
14 Answers
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How to discard local commits in Git?
...h -D master was not necessary though, since as pointed out it generates an error.
– Alexis Wilke
Jun 3 '14 at 21:18
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Reorder levels of a factor without changing order of values
... works on one dataset, not on another. On the other dataset, it throws an error "Error in tapply(X = X, INDEX = x, FUN = FUN, ...) : argument "X" is missing, with no default". Not sure what the solution to this problem is. I can't find any relevant difference between the datasets.
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Please enter a commit message to explain why this merge is necessary, especially if it merges an upd
I am using Git. I did a pull from a remote repo and got an error message:
8 Answers
8
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How to pip install a package with min and max version range?
...ersioning works wouldn't write ~=0.2.1 in a requirements file. That's user error, not a disadvantage of the ~= prefix.
– Brad Root
Nov 7 '19 at 18:15
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How can I update npm on Windows?
...he instruction, but when running "npm-windows-upgrade" I get the following error: npm-windows-upgrade : The term 'npm-windows-upgrade' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the pat...
Delete all documents from index/type without deleting type
...atic since it silently forces a refresh which can quickly cause OutOfMemoryError during concurrent indexing" elastic.co/guide/en/elasticsearch/reference/1.7/…
– usef_ksa
Jan 14 '16 at 9:51
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What is the most efficient way to concatenate N arrays?
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I believe your test may have an error: the a.concat(b) test case seems to be needlessly making a copy of the array a then throwing it away.
– ninjagecko
Apr 22 '12 at 21:35
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Android Writing Logs to text File
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org.apache.log4j.Logger log= Log4jHelper.getLogger( "YourActivity" );
log.error("Error");
log.info("Info");
log.warn("Warn");
Example Source. Note that, log4j 2.x ( improved functionalities ) rewritten from scratch is not backward comptible with log4j 1.x. So you have to use log4j 1.2.x jar with...