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Global and local variables in R
...u're inside a function R creates a new environment for you. By default it includes everything from the environment in which it was created so you can use those variables as well but anything new you create will not get written to the global environment.
In most cases <<- will assign to varia...
How to copy files from 'assets' folder to sdcard?
...r the other solutions, little bit neater. Slight modification on mine that includes creating missing fileFolders. cheers!
– Chris.Jenkins
Jul 24 '12 at 12:46
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How to prevent Node.js from exiting while waiting for a callback?
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Based on @Todd's answer, I created a one-liner. Include it in the beginning of your script, and set done = true when you are done:
var done = (function wait () { if (!done) setTimeout(wait, 1000) })();
Example:
var done = (function wait () { if (!done) setTimeout(wait,...
Is is possible to check if an object is already attached to a data context in Entity Framework?
...he reason Mosh's check is not always enough to prevent the error, is that .Include()'ed navigation properties are also attempted to be attached when you call .Attach or sets its EntityState to EntityState.Unchanged - and they will conflict if any of the entities refer to the same entity. I haven't f...
What's the UIScrollView contentInset property for?
...we would set the top origin to be below the TOP BUTTONS, and the height to include the bottom of BOTTOM TAB BAR. To gain access to the Text sitting underneath the BOTTOM TAB BAR content we would set the bottom inset to be the height of the BOTTOM TAB BAR.
Without the inset, the scroller would not ...
Restricting input to textbox: allowing only numbers and decimal point
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include keypad numkeys and periods with: && charCode != 190 && charCode != 110 && (charCode > 105 || charCode < 96)
– mga
Nov 27 '13 at 19:38
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Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio
...bases for critical production applications. Standard and Premium databases include notifications for downtime events, and are much more performant and stable in general. You can use pg:copy to migrate to a standard or premium plan.
If this continues, you can try provisioning a new database (on a dif...
How to prevent form from submitting multiple times from client side?
...s up a very valid point. All form validation must happen server side. This includes multiple submission checks. Never trust the client! This is not only a case if javascript is disabled. You must keep in mind that all client side code can be modified. It is somewhat difficult to imagine but the html...
Drawing a connecting line between two elements [closed]
...tion available that supports drag and drop, as seen by its numerous demos, including the Flowchart demo.
It is available in a free Community edition, and a paid Toolkit edition.
The Toolkit edition wraps the Community edition with a comprehensive data binding layer, as well as several UI widget...
Best way to compare 2 XML documents in Java
...cted this behavior from myDiff.identical(), and not from myDiff.similar(). Include XMLUnit.setIgnoreWhitespace(true); in your setUp method to change the behavior for all tests in your test class, or use it in an individual test method to change the behavior for only that test.
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