See also, http://libraryofalexandria.io/cgo/
cgo
has a lot of trap.
but Not "C" pkg also directory in $GOROOT/src
. IDE's(vim) Goto command not works.
So, Here collect materials.
#!/usr/bin/python | |
from bcc import BPF | |
from time import sleep | |
# This outputs a count of how many times the clone and execve syscalls have been made | |
# showing the use of an eBPF map (called syscall). | |
program = """ | |
BPF_HASH(syscall); |
See also, http://libraryofalexandria.io/cgo/
cgo
has a lot of trap.
but Not "C" pkg also directory in $GOROOT/src
. IDE's(vim) Goto command not works.
So, Here collect materials.
package main | |
import ( | |
"fmt" | |
"log" | |
"net/http" | |
"html/template" | |
"github.com/gorilla/sessions" |
belongs_to
association does not automatically save the object. It does not save the associated object either.has_one
association, that object is automatically saved (in order to update its foreign key).has_one
association) is unsaved (that is, new_record?
returns true) then the child objects are not saved. They will automatically when the parent object is saved.#!/usr/bin/perl | |
use Mysql; | |
use strict; | |
use vars qw($school_name); | |
use vars qw($pass); | |
require "./cgi-lib.pl"; |
public class AnimatedActivity extends Activity | |
{ | |
@Override | |
protected void onCreate(Bundle savedInstanceState) | |
{ | |
super.onCreate(savedInstanceState); | |
//opening transition animations | |
overridePendingTransition(R.anim.activity_open_translate,R.anim.activity_close_scale); | |
} |
Attention: the list was moved to
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#!/usr/bin/python | |
# | |
# Example usage | |
# $ ./gangnam.py | gnuplot | |
# 9 | |
# 0 0 | |
# 1 1 | |
# 2 2 | |
# 0 2 | |
# 1 1 |
#include<iostream> | |
using namespace std; | |
#define odd(x) (x&1) | |
#define even(x) (!(x&1)) | |
int main(){ | |
int x; | |
cin >> x; |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |