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Deleting DataFrame row in Pandas based on column value
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@vfxGer if there is a space in the column, like 'line race', then you can just do df = df[df['line race'] != 0]
– Paul
Apr 27 '16 at 16:36
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Why does appending “” to a String save memory?
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Doing the following:
data.substring(x, y) + ""
creates a new (smaller) String object, and throws away the reference to the String created by substring(), thus enabling garbage collection of this.
The important thing to realise is that substring() gives a wi...
How to print last two columns using awk
... Just to add to the previous comment, the problem with using '{print $x,"\t",$y}' is that awk interprets each comma separated variable as it's own field, so the result will actually be field1<space><tab><space>field2, (because it will use white space delimiter by default) as o...
How to post data to specific URL using WebClient in C#
...ebClient())
{
wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
string HtmlResult = wc.UploadString(URI, myParameters);
}
it works like charm :)
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impr...
How to add ASP.NET 4.0 as Application Pool on IIS 7, Windows 7
...rt this as an administrator if you have UAC enabled.
To do so, locate the exe (usually you can start typing with Start Menu open), right click and select "Run as Administrator"
Type cd C:\Windows\Microsoft.NET\Framework\v4.0.30319\ and press ENTER.
Type aspnet_regiis.exe -ir and press ENTER again.
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LINQ to Entities does not recognize the method 'System.String ToString()' method, and this method ca
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Just save the string to a temp variable and then use that in your expression:
var strItem = item.Key.ToString();
IQueryable<entity> pages = from p in context.pages
where p.Serial == strItem
select p;
The problem arises because ...
How do I URL encode a string
...Apparently this is a bug that Apple is aware of, but since they have not fixed it yet, I have been using this category to url-encode a string:
@implementation NSString (NSString_Extended)
- (NSString *)urlencode {
NSMutableString *output = [NSMutableString string];
const unsigned char *sou...
What is fastest children() or find() in jQuery?
...hods, while children() uses JavaScript interpreted in the browser. In my experiments there isn't much performance difference in typical cases.
Which to use depends on whether you only want to consider the immediate descendants or all nodes below this one in the DOM, i.e., choose the appropriate me...
try {} without catch {} possible in JavaScript?
... shown in stackoverflow.com/a/5764505/68210
– Daniel X Moore
Feb 21 '14 at 21:59
4
@DanielXMoore,...
How to clear the cache of nginx?
I use nginx to as the front server, I have modified the CSS files, but nginx is still serving the old ones.
22 Answers
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