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When to use cla(), clf() or close() for clearing a plot in matplotlib?
... of many axes. Additionally, there are functions from the pyplot interface and there are methods on the Figure class. I will discuss both cases below.
pyplot interface
pyplot is a module that collects a couple of functions that allow matplotlib to be used in a functional manner. I here assume that...
Environment variable to control java.io.tmpdir?
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Hmmm -- since this is handled by the JVM, I delved into the OpenJDK VM source code a little bit, thinking that maybe what's done by OpenJDK mimics what's done by Java 6 and prior. It isn't reassuring that there's a way to do this other than on Win...
Passing variables to the next middleware using next() in Express.js
...ant to pass some variable from the first middleware to another middleware, and I tried doing this, but there was " req.somevariable is a given as 'undefined'".
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A migration to add unique constraint to a combination of columns
...mns. i.e. for a people table, a combination of first_name , last_Name and Dob should be unique.
6 Answers
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How to change Git log date formats
...g "--pretty". log.date config variable
sets a default value for log command’s --date option.
--date=relative shows dates relative to the current time, e.g. "2 hours ago".
--date=local shows timestamps in user’s local timezone.
--date=iso (or --date=iso8601) shows timestamps in ISO 8601 for...
AngularJS - wait for multiple resource queries to complete
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You'll want to use promises and $q.all().
Basically, you can use it to wrap all of your $resource or $http calls because they return promises.
function doQuery(type) {
var d = $q.defer();
var result = Account.query({ type: type }, function() {
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Application Loader: “Cannot proceed with delivery: an existing transporter instance is currently upl
...omputers - it's like the server is hung up on an op that I never initiated and it won't time out. Has anyone seen it before and beaten it?
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How do I read any request header in PHP
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// Replace XXXXXX_XXXX with the name of the header you need in UPPERCASE (and with '-' replaced by '_')
$headerStringValue = $_SERVER['HTTP_XXXXXX_XXXX'];
ELSE IF: you run PHP as an Apache module or, as of PHP 5.4, using FastCGI (simple method):
apache_request_headers()
<?php
$headers = apa...
Get first n characters of a string
...hat's the fastest way to trim a string to a specific number of characters, and append '...' if needed?
19 Answers
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Detect Chrome extension first run / update
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I used this code for a while and it worked great, until my extension requested a new permission on an update (which suspends the extension until the user accepts the permission). When the permission was accepted and the extension was unsuspended, the onI...