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Java null check why use == instead of .equals()
...l,
// so one of the first checks inside the `Foo#equals` method will
// disallow the equality because it sees that `other` == null
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MySQL select 10 random rows from 600K rows fast
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Yes, if you have potentially big gaps in ID's then the chance of your lowest ID's being picked randomly is much lower than your high IDs. In fact the chance that the first ID after the biggest gap getting picked is actually the highest. Therefore th...
Set width of a “Position: fixed” div relative to parent div
... second problem is (based on your edit), but if you apply width:inherit to all inner divs, it works: http://jsfiddle.net/4bGqF/9/
You might want to look into a javascript solution for browsers that you need to support and that don´t support width:inherit
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What database does Google use?
...le has successfully
provided a flexible, high-performance
solution for all of these Google
products.
Some features
fast and extremely large-scale DBMS
a sparse, distributed multi-dimensional sorted map, sharing characteristics of both row-oriented and column-oriented databases.
designed to...
git update-index --assume-unchanged returns “fatal unable to mark file”
...nd downloaded the latest version of git, but this did not help.
What I finally realized is that this command is case sensitive! This includes the full path and file name. After updating path to the directory so that the full path was specified with proper casing, the command executed properly.
N...
How to combine class and ID in CSS selector?
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There are differences between #header .callout and #header.callout in css.
Here is the "plain English" of #header .callout:
Select all elements with the class name callout that are descendants of the element with an ID of header.
And #header.callout means:
Select...
Throwing exceptions from constructors
...ody who creates the object of mutex has to remember that init() has to be called. I feel it goes against the RAII principle.
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Get next / previous element using JavaScript?
... page
var selectionDiv = document.getElementById("MySecondDiv");
So basically with selectionDiv iterate through the collection to find its index, and then obviously -1 = previous +1 = next within bounds
for(var i = 0; i < divs.length;i++)
{
if(divs[i] == selectionDiv)
{
var previous...
Remove characters from C# string
...tring.Empty);
}
But I may suggest another approach if you want to remove all non letter characters
var str = "My name @is ,Wan.;'; Wan";
str = new string((from c in str
where char.IsWhiteSpace(c) || char.IsLetterOrDigit(c)
select c
).ToArray());
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Removing non-repository files with git?
...es. By default, it will only print what it would have removed, without actually removing them.
Given the -f flag to remove the files, and the -d flag to remove empty directories as well :
git clean -df
Also removing ignored files :
git clean -dfx
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