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Importing data from a JSON file into R
... file into R? More specifically, the file is an array of JSON objects with string fields, objects, and arrays. The RJSON Package isn't very clear on how to deal with this http://cran.r-project.org/web/packages/rjson/rjson.pdf .
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How can I tell when HttpClient has timed out?
...l then throw a TaskCanceledException if it has timed out. Additionally, GetStringAsync and GetStreamAsync internally handle timeout, so they will NEVER throw.
string baseAddress = "http://localhost:8080/";
var client = new HttpClient()
{
BaseAddress = new Uri(baseAddress),
Timeout = Time...
Debugging sqlite database on the device
...(preferably a hex-viewer) and check whether it starts with SQLite format 3 string. Also make sure you have a correct sqlite version (i.e. you're not trying to open sqlite3 database with sqlite2 executable). And you may also try other SQLite clients (for example SQLiteStudio). Hope it helps.
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Prevent strace from abbreviating arguments?
...You want the -v -s strsize option, which specifies the maximum length of a string to display (the default is 32).
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HTML5 Video Dimensions
...--- //
/**
Returns the dimensions of a video asynchrounsly.
@param {String} url Url of the video to get dimensions from.
@return {Promise} Promise which returns the dimensions of the video in 'width' and 'height' properties.
*/
function getVideoDimensionsOf(url){
return new Promise(fun...
Detect when an image fails to load in Javascript
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/**
* Tests image load.
* @param {String} url
* @returns {Promise}
*/
function testImageUrl(url) {
return new Promise(function(resolve, reject) {
var image = new Image();
image.addEventListener('load', resolve);
image.addEventListener('error',...
How to write an XPath query to match two attributes?
...t;X>
<Y ATTRIB1=attrib1_value ATTRIB2=attrib2_value/>
</X>
string xPath="/" + X + "/" + Y +
"[@" + ATTRIB1 + "='" + attrib1_value + "']" +
"[@" + ATTRIB2 + "='" + attrib2_value + "']"
XPath Testbed:
http://www.whitebeam.org/library/guide/TechNotes/xpathtestbed.rhtm
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Best content type to serve JSONP?
...bservice that when called without specifying a callback will return a JSON string using application/json as the content type.
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How do I start my app on startup?
...d be better to use Intent.ACTION_BOOT_COMPLETED instead of hard-coding the string in your Receiver. Also, should use the new Intent(context, MySystemService.class) constructor when creating the Intent.
– brianestey
Aug 27 '12 at 15:15
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Center a popup window on screen?
...o. You can also change the options with an object (easier to manage than a string)
– SwiftNinjaPro
Apr 16 at 19:06
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