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Regex empty string or email
...can't handle it anyway. Try to find a library routine for matching them. If you only want to solve the practical problem of matching an email address (that is, if you want wrong code that happens to (usually) work), use the regular-expressions.info link someone else submitted.
As for the empty st...
How can I filter lines on load in Pandas read_csv function?
...ther load the file and then filter using df[df['field'] > constant], or if you have a very large file and you are worried about memory running out, then use an iterator and apply the filter as you concatenate chunks of your file e.g.:
import pandas as pd
iter_csv = pd.read_csv('file.csv', iterat...
Difference between make and build in Android Studio
...ies and making big changes to the project you should use Rebuild Project.
If you look at the menu, you'll see that Make Project and Compile have keyboard shortcuts, that suggests that they are often used. Others are seldom used.
It is the same as IntelliJ Idea.
Compile All the source files in...
How can I use PHP to dynamically publish an ical file to be read by Google Calendar?
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This should be very simple if Google Calendar does not require the *.ics-extension (which will require some URL rewriting in the server).
$ical = "BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//hacksw/handcal//NONSGML v1.0//EN
BEGIN:VEVENT
UID:" . md5(uniqid(m...
Round to 5 (or other number) in Python
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If only integers and rounding down, then you can also just do x // base * base
– Tjorriemorrie
Dec 20 '16 at 0:59
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Why start a shell command with a backslash?
...
alias curl='curl --some --default --options'
If you have an alias for curl and you don't want to use it, putting a backslash in front disables the alias and runs the curl binary directly.
Note that this only applies at an interactive shell. Aliases don't take effect in...
Allow anything through CORS Policy
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github.com/cleor41/Cors-Rails4-API Check this out if you don't know where to put it still.
– CleoR
Oct 7 '14 at 14:46
8
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difference between scope and namespace of ruby-on-rails 3 routing
I can't understand what the difference is between a namespace and a scope in the routing of ruby-on-rails 3.
5 Answers
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Explain the encapsulated anonymous function syntax
...ork because it is being parsed as a FunctionDeclaration, and the name identifier of function declarations is mandatory.
When you surround it with parentheses it is evaluated as a FunctionExpression, and function expressions can be named or not.
The grammar of a FunctionDeclaration looks like this:...
Recover from git reset --hard?
...usly staged changes (git add) should be recoverable from index objects, so if you did, use git fsck --lost-found to locate the objects related to it. (This writes the objects to the .git/lost-found/ directory; from there you can use git show <filename> to see the contents of each file.)
If no...