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mmap() vs. reading blocks
...g to find the final word on mmap / read performance on Linux and I came across a nice post (link) on the Linux kernel mailing list. It's from 2000, so there have been many improvements to IO and virtual memory in the kernel since then, but it nicely explains the reason why mmap or read might be fas...
The selected run destination is not valid for this action
...everal times. Basically, just set the Base SDK in Build Settings to Latest OS X and it should work properly.
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How do I create a parameterized SQL query? Why Should I?
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'Connection string for mysql
Public SQLSource As String = "Server=123.456.789.123;userid=someuser;password=somesecurepassword;database=somedefaultdatabase;"
'database connection classes
Private DBcon As New MySqlConnection
Private SQLcmd As MySqlCommand
Public DBDA As New ...
Android中Java和JavaScript交互 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...oid.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.webkit.JavascriptInterface;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import a...
Context switches much slower in new linux kernels
We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to belie...
Is .NET/Mono or Java the better choice for cross-platform development? [closed]
...e portable. Mono isn't implemented everywhere, and it lags behind the Microsoft implementation significantly. The Java SDK seems to stay in better sync across platforms (and it works on more platforms).
I'd also say Java has more tool availability across all those platforms, although there are ...
Python strptime() and timezones?
...mitation of that lib. >>> parser.parse("Thu, 25 Sep 2003 10:49:41,123 -0300") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/wanghq/awscli/lib/python2.7/site-packages/dateutil/parser.py", line 748, in parse return DEFAUL...
HTML 5 tag vs Flash video. What are the pros and cons?
...y out; <video> support is ubiquitous, including mobile devices. Almost anything that Flash could do, HTML can now do too. HTML won, Flash lost. If you're pondering on how to embed video in your page, just use <video> and don't give it a second thought. This question is only preserved...
Can I do a partial revert in GIT
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gioele
7,91233 gold badges4646 silver badges7373 bronze badges
answered Apr 14 '11 at 20:43
bobDevilbobDevil
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Selecting data frame rows based on partial string match in a column
... 4 140.8 95 3.92 3.15 22.9 1 0 4 2
# Merc 280 19.2 6 167.6 123 3.92 3.44 18.3 1 0 4 4
# Merc 280C 17.8 6 167.6 123 3.92 3.44 18.9 1 0 4 4
# Merc 450SE 16.4 8 275.8 180 3.07 4.07 17.4 0 0 3 3
# Merc 450SL 17.3 8 275.8 180 3.07 3.73 17.6 0 0 3 ...