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New features in java 7
...e system. A zip file system provider is also available in JDK 7.
Source: http://ohmjavaclasses.blogspot.com/
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mongodb: insert if not exists
...
As of MongoDB 2.4, you can use $setOnInsert (http://docs.mongodb.org/manual/reference/operator/setOnInsert/)
Set 'insertion_date' using $setOnInsert and 'last_update_date' using $set in your upsert command.
To turn your pseudocode into a working example:
now = dateti...
Can't find a “not equal” css attribute selector
...
:not([foo=''])
{
background: red;
}
http://jsfiddle.net/gsLvuys0/
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Downloading a file from spring controllers
...
public void getFile(
@PathVariable("file_name") String fileName,
HttpServletResponse response) {
try {
// get your file as InputStream
InputStream is = ...;
// copy it to response's OutputStream
org.apache.commons.io.IOUtils.copy(is, response.getOutputStream());...
Is there a jQuery unfocus method?
...
$('#textarea').blur()
Documentation at: http://api.jquery.com/blur/
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How do I load an HTML page in a using JavaScript?
...tion load_home (e) {
(e || window.event).preventDefault();
fetch("http://www.yoursite.com/home.html" /*, options */)
.then((response) => response.text())
.then((html) => {
document.getElementById("content").innerHTML = html;
})
.catch((error) => {
co...
How to compare two tags with git?
...you are doing a diff on the commits between them.
Also, a good reference: http://learn.github.com/p/diff.html
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How do I resolve “Cannot find module” error using Node.js?
...e depends on. A few days ago, somebody unpublished all of their packages (https://kodfabrik.com/journal/i-ve-just-liberated-my-modules) which broke React, Babel, and just about everything else. Hopefully it's clear now that if you have production code, you can't rely on NPM actually maintaining yo...
xpath find if node exists
... element and look to see if the result is nil.
require 'nokogiri'
url = "http://somthing.com/resource"
resp = Nokogiri::XML(open(url))
first_name = resp.xpath("/movies/actors/actor[1]/first-name")
puts "first-name not found" if first_name.nil?
...
JavaScript math, round to two decimal places [duplicate]
...und up or down for you depending on the values beyond 2 decimals.
Example: http://jsfiddle.net/calder12/tv9HY/
Documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toFixed
Edit - As mentioned by others this converts the result to a string. To avoid t...