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What's the difference between a proc and a lambda in Ruby?
...of a lambda triggers the code right outside of the lambda code
def lambda_test
lam = lambda { return }
lam.call
puts "Hello world"
end
lambda_test # calling lambda_test prints 'Hello World'
‘return’ inside of a proc triggers the code outside of the method where the proc...
How to “grep” for a filename instead of the contents of a file?
...
The easiest way is
find . | grep test
here find will list all the files in the (.) ie current directory, recursively.
And then it is just a simple grep. all the files which name has "test" will appeared.
you can play with grep as per your requirement.
Not...
SHA512 vs. Blowfish and Bcrypt [closed]
...ons of trials per second using equipment that costs on the order of $1000, testing all passwords up to 8 characters long in a few months.
If however, the digest output is "fed back" thousands of times, it will take hundreds of years to test the same set of passwords on that hardware. Bcrypt achiev...
CSS checkbox input styling
...
After hours of searching and testing this is the only thing that worked for me. Thanks!
– Mark
May 14 at 17:52
1
...
Label encoding across multiple columns in scikit-learn
... a pipeline e.g. separate fit and transform (fit on train, and then use on test-set --> re-use the learnt dictionary) is this supported with df.apply(LabelEncoder().fit_transform)?
– Georg Heiler
Sep 14 '16 at 9:25
...
How can you run a command in bash over until success
...
You need to test $? instead, which is the exit status of the previous command. passwd exits with 0 if everything worked ok, and non-zero if the passwd change failed (wrong password, password mismatch, etc...)
passwd
while [ $? -ne 0 ]; ...
How to check whether an array is empty using PHP?
...t; [UserValue02]
ARRAY THREE:
[0] => []
[1] => []
And testing the above arrays with empty() returns the following results:
ARRAY ONE:
$ArrayOne is not empty
ARRAY TWO:
$ArrayTwo is not empty
ARRAY THREE:
$ArrayThree is not empty
An array will always be ...
JavaScript, elegant way to check nested object properties for null/undefined [duplicate]
... may return a property from anywhere in the chain, it doesn't specifically test for the last property.
– RobG
May 22 '14 at 14:21
2
...
XMLHttpRequest cannot load file. Cross origin requests are only supported for HTTP
...riting HTML and Javascript in a code editor on your personal computer, and testing the output in your browser, you will probably get error messages about Cross Origin Requests. Your browser will render HTML and run Javascript, jQuery, angularJs in your browser without needing a server set up. But ...
Adding hours to JavaScript Date object?
...s= function(h){
this.setHours(this.getHours()+h);
return this;
}
Test:
alert(new Date().addHours(4));
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