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What is the difference between require() and library()?
...value by default. TRUE if the packages is loaded, FALSE if it isn't.
> test <- library("abc")
Error in library("abc") : there is no package called 'abc'
> test
Error: object 'test' not found
> test <- require("abc")
Loading required package: abc
Warning message:
In library(package, l...
Pip freeze vs. pip list
...ere, django==1.4.2 implies install django version 1.4.2 (even though the latest is 1.6.x).
If you do not specify ==1.4.2, the latest version available would be installed.
You can read more in "Virtualenv and pip Basics",
and the official "Requirements File Format" documentation.
...
change cursor to finger pointer
...
After testing this, it seems like it's necessary to have both onmouseover="" AND style=cursor: pointer;". If you just have the style tag, the pointer pointer cursor will disappear/default to the standard pointer after one click int...
using jquery $.ajax to call a PHP function
...ant is something like:
$.ajax({ url: '/my/site',
data: {action: 'test'},
type: 'post',
success: function(output) {
alert(output);
}
});
On the server side, the action POST parameter should be read and the corresponding value shoul...
Path of assets in CSS files in Symfony 2
...nt the image in /web/bundles/mynicebundle/images/devil.png
I have made a test with ALL possible (sane) combinations of the following:
@notation, relative notation
Parse with cssrewrite, without it
CSS image background vs direct <img> tag src= to the very same image than CSS
CSS parsed with...
str.startswith with a list of strings to test for
...
str.startswith allows you to supply a tuple of strings to test for:
if link.lower().startswith(("js", "catalog", "script", "katalog")):
From the docs:
str.startswith(prefix[, start[, end]])
Return True if string starts with the prefix, otherwise return False. prefix can ...
Why do we need to install gulp globally and locally?
...ckage.json):
"devDependencies": {
"gulp": "3.5.2"
}
"scripts": {
"test": "gulp test"
}
etc. and running with npm run test then you shouldn't need the global install at all.
Both methods are useful for getting people set up with your project since sudo isn't needed. It also means that gul...
How do you deal with configuration files in source control?
...sions of the config files for each environment (web.config.dev, web.config.test, web.config.prod). Our deployment scripts copy out the correct version, renaming it to web.config. This way, we have full version control on the config files for each environment, can easily perform a diff, etc.
...
Share Large, Read-Only Numpy Array Between Multiprocessing Processes
...n use numpy.memmap. For example, if you have an array stored in disk, say 'test.array', you can use simultaneous processes to access the data in it even in "writing" mode, but your case is simpler since you only need "reading" mode.
Creating the array:
a = np.memmap('test.array', dtype='float32', ...
How to mount a host directory in a Docker container
... I tried like this kishore$ docker -v /Users/kishore/main_folder:/test_container Docker version 0.9.1, build 867b2a9 kishore$ docker run -v /Users/kishore/main_folder:/test_container Usage: docker run [OPTIONS] IMAGE [COMMAND] [ARG...] Run a command in a new container -P, --publish-a...