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getting the last item in a javascript object
...f you create an associative array in JS using the array markers [] it is really an object. JS does not have associative arrays as such, arrays have indexed access and sequence; objects have associative property access, non-sequential.
– Orbling
Nov 30 '10 at 19...
Efficient way to remove keys with empty strings from a dict
I have a dict and would like to remove all the keys for which there are empty value strings.
17 Answers
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Display a tooltip over a button using Windows Forms
...ying tool tips for multiple elements on a single form.
Say your button is called MyButton.
Add a ToolTip control (under Common
Controls in the Windows Forms
toolbox) to your form.
Give it a
name - say MyToolTip
Set the "Tooltip on MyToolTip" property of MyButton (under Misc in
the button property ...
How can I make git show a list of the files that are being tracked?
...
If you want to list all the files currently being tracked under the branch master, you could use this command:
git ls-tree -r master --name-only
If you want a list of files that ever existed (i.e. including deleted files):
git log --pretty=f...
Adding div element to body or document in JavaScript
...0%;opacity:0.3;z-index:100;background:#000;"></div>';
Edit:-
Ideally you should use body.appendChild method instead of changing the innerHTML
var elem = document.createElement('div');
elem.style.cssText = 'position:absolute;width:100%;height:100%;opacity:0.3;z-index:100;background:#000';...
Create a .txt file if doesn't exist, and if it does append a new line
... come i wont see that before? Damn... I felt like a total dumb thanks. I really preciate these kinda good answers.
– Berker Yüceer
Mar 28 '12 at 13:07
7
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Copy files without overwrite
I just can't seem to find a way on the command line to say "copy all the files from directory A to directory B, but if the file already exists in directory B, don't overwrite it, no matter which file is newer, and don't prompt me."
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What to return if Spring MVC controller method doesn't return value?
I am using jQuery's $.getJSON() to make asynchronous calls to my simple Spring MVC backend. Most of the Spring controller methods look like this:
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jQuery deferreds and promises - .then() vs .done()
...n't see the difference between using .then() & .done() for successful callbacks. I know Eric Hynds mentions that .done() and .success() map to the same functionality but I'm guessing so does .then() as all the callbacks are all invoked on a completion of a successful operation.
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Best way to convert strings to symbols in hash
What's the (fastest/cleanest/straightforward) way to convert all keys in a hash from strings to symbols in Ruby?
31 Answers...