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The way to check a HDFS directory's size?
...n.example.com/user/hadoop/dir1
Exit Code: Returns 0 on success and -1 on error.
source: Apache doc
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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
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What is Type-safe?
... means that the compiler will validate types while compiling, and throw an error if you try to assign the wrong type to a variable.
Some simple examples:
// Fails, Trying to put an integer in a string
String one = 1;
// Also fails.
int foo = "bar";
This also applies to method arguments, since yo...
Programmatically Request Access to Contacts
...ABAddressBookRequestAccessWithCompletion(addressBookRef, ^(bool granted, CFErrorRef error) {
if (granted) {
// First time access has been granted, add the contact
[self _addContactToAddressBook];
} else {
// User denied access
// Display an alert t...
How can I combine hashes in Perl?
What is the best way to combine both hashes into %hash1? I always know that %hash2 and %hash1 always have unique keys. I would also prefer a single line of code if possible.
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What is the purpose of willSet and didSet in Swift?
Swift has a property declaration syntax very similar to C#'s:
11 Answers
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Could not launch process launch failed: timed out waiting for app to launch
...tflight and after uploding to testflight via distribution certificate this error is going to occur.
– Mrugesh Tank
Apr 14 '15 at 14:11
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How can I list ALL DNS records?
Is there any way I can list ALL DNS records for a domain?
8 Answers
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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 reset a single table in rails?
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In case anyone tried this and got an error, I did ActiveRecord::Base.connection.execute("DELETE from 'yourtablename'") and it worked because it would give me an error that said sqlite_sequence where name = 'yourtablename' is not a valid table name or something l...