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Data structure: insert, remove, contains, get random element, all at O(1)
...o other solutions).
The requirement that's tricky is the "random element" selection: in a hash table, you would need to scan or probe for such an element.
For closed hashing / open addressing, the chance of any given bucket being occupied is size() / capacity(), but crucially this is typically kep...
“Width equals height” constraint in Interface Builder
...click and drag from a view and release while the pointer is over the view. Select "Aspect Ratio". It will create a constraint where the first and second item is the view.
Before Xcode 5.1
You can't because the width/height editor lacks the fields to relate to another property or set the ratio:
...
With Mercurial, how can I “compress” a series of changesets into one before pushing?
...
If you are using TortoiseHg, use can just select two revisions (use CTRL to select non-subsequent ones), right click and select "Compress History".
After that you'll get a new change list in new head starting from the first change you selected before, it will contai...
mysql check collation of a table
...ry INFORMATION_SCHEMA.TABLES and get the collation for a specific table:
SELECT TABLE_SCHEMA
, TABLE_NAME
, TABLE_COLLATION
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME = 't_name';
that gives a much more readable output in contrast to SHOW TABLE STATUS that contains a lot of irreleva...
Android SDK on a 64-bit linux machine
...to current install instructions: developer.android.com/studio/install.html select 'linux' on the top right platform selection box.
– amotzg
Jul 6 '17 at 6:35
...
How to view UTF-8 Characters in VIM or Gvim
...
On Microsoft Windows, gvim wouldn't allow you to select non-monospaced fonts. Unfortunately Latha is a non-monospaced font.
There is a hack way to make it happen: Using FontForge (you can download Windows binary from http://www.geocities.jp/meir000/fontforge/) to edit the L...
Debugging iframes with Chrome developer tools
...ools in Chrome, there is a bar along the top, called the Execution Context Selector (h/t felipe-sabino), just under the Elements, Network, Sources... tabs, that changes depending on the context of the current tab. When in the Console tab there is a dropdown in that bar that allows you to select the...
File input 'accept' attribute - is it useful?
...PDF, and EPS files, but accept='.jpg,.png,.gif,.pdf,.eps' didn't allow any selection. I tried many variations - space delimited, no dot characters, etc., but no dice in Chrome v20, so I ended up using the mime types and it worked great: accept='image/jpeg,image/gif,image/png,application/pdf,image/x-...
What's the best way to make a d3.js visualisation layout responsive?
...n the window resizes like so:
var aspect = width / height,
chart = d3.select('#chart');
d3.select(window)
.on("resize", function() {
var targetWidth = chart.node().getBoundingClientRect().width;
chart.attr("width", targetWidth);
chart.attr("height", targetWidth / aspect);
});
...
Can Vim highlight matching HTML tags like Notepad++?
...at the cursor is on? 2. Currently, if a html tag has attributes, those are selected as well. Is it possible only to select the tag name, without attributes?
– linqq
Nov 21 '11 at 19:49
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