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How to retrieve POST query parameters?
... Express 3.0.
This was different starting Express 4.0 to 4.15:
$ npm install --save body-parser
and then:
var bodyParser = require('body-parser')
app.use( bodyParser.json() ); // to support JSON-encoded bodies
app.use(bodyParser.urlencoded({ // to support URL-encoded bodies
extended...
How to insert an element after another element in JavaScript without using a library?
...or Ease of Use
By building the following prototypes, you will be able to call these function directly from newly created elements.
newElement.appendBefore(element);
newElement.appendAfter(element);
.appendBefore(element) Prototype
Element.prototype.appendBefore = function (element) {
eleme...
Create Windows service from executable
...along with having to surround the executable path with double quotes is totally wrong, at least for windows 10. the quoting is required if and only if the path contains special characters like whitespace. also, casing (lowe/upper/mixed-case) doesn't matter anywhere, in variable names too, and displa...
How to iterate over values of an Enum having flags?
...s)Enum.Parse(typeof(Items), v)); // Boo
I adapted what Enum does internally to generate the string to instead return the flags. You can look at the code in reflector and should be more or less equivalent. Works well for general use cases where there are values which contain multiple bits.
sta...
How to get current path with query string using Capybara
...rrent_url might contain a port number. E.g. given a current_url of http://foo.com:8888/some/path, current_url[current_host.size..-1] will equal :8888/some/path. Also, behind the scenes current_host does the same sort of URI.parse logic that @nzifnab recommended in the accepted answer.
...
Why do I need to explicitly push a new branch?
... did git push my branch was not uploaded to the repository. I had to actually do: git push -u origin --all .
Why is this? Isn't a branch a new change to be pushed by default? Why do I need to run the second command?
...
Pass a data.frame column name to a function
...l_name,col1,col2){
df$col_name <- df$col1 + df$col2
df
}
#Call foo() like this:
foo(dat,z,x,y)
The problem here is that df$col1 doesn't evaluate the expression col1. It simply looks for a column in df literally called col1. This behavior is described in ?Extract under the secti...
What is the HTML tabindex attribute?
... to set the order but just make your element focusable use tabindex="0" on all such elements:
<div tabindex="0"></div>
Also, if you don't want it to be focusable via the tab key then use tabindex="-1". For example, the below link will not be focused while using tab keys to traverse.
...
Why does Java's hashCode() in String use 31 as a multiplier?
... i == (i << 5) - i. Modern VMs do this sort of optimization automatically.
(from Chapter 3, Item 9: Always override hashcode when you override equals, page 48)
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Compress files while reading data from STDIN
...
Yes, gzip will let you do this. If you simply run gzip > foo.gz, it will compress STDIN to the file foo.gz. You can also pipe data into it, like some_command | gzip > foo.gz.
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