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How to replace an entire line in a text file by line number
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in bash, replace N,M by the line numbers and xxx yyy by what you want
i=1
while read line;do
if((i==N));then
echo 'xxx'
elif((i==M));then
echo 'yyy'
else
echo "$line"
fi
((i++))
done < orig-file > new-file
EDIT
In fact in this solution t...
MongoDB/NoSQL: Keeping Document Change History
... version: 3, value: "Something cool" }
]
},
{
author: "xxx",
body: [
{ version: 4, value: "Spam" },
{ version: 5, deleted: true }
]
},
{
author: "jim",
body: [
{ version: 7, value: "Not bad" },
{ version: 8, value: "...
Colored logcat in android studio by colorpid
...ndroidStudio and copy in
Mac: /Users/.../Library/Preferences/AndroidStudioXX.XX/ Windows: C:\Users....AndroidStudioXX.XX\config\
Then go to logcat in settings and choose the file.
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SSL Connection / Connection Reset with IISExpress
... : 0.0.0.0:44300
Certificate Hash : eb380ba6bd10fb4f597cXXXXXXXXXX
Application ID : {214124cd-d05b-4309-XXX-XXXXXXX}
Also look in the IIS express management console (RUN (Ctrl+R) -> inetmgr.exe)
and find if the corresponding certificate exists in the Server Cer...
Backwards migration with Django South
...gration name at the end of the parameters:
./manage.py migrate app-name 00xx-migration-name
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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...ons=16 -falign-loops=16
Long answer:
The code will run slower if:
an XX byte boundary cuts add() in the middle (XX being machine dependent).
if the call to add() has to jump over an XX byte boundary and the target is not aligned.
if add() is not aligned.
if the loop is not aligned.
The firs...
C# How can I check if a URL exists/is valid?
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I would add that some status codes in the 3xx range will actually cause an error to be thrown e.g. 304 Not Modified in which case you should be handling that in your catch block
– RobV
Aug 25 '11 at 8:43
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Callback on CSS transition
...a chunk of code that looks a bit like this:
var transitionEndEventName = "XXX"; //figure out, e.g. "webkitTransitionEnd"..
var elemToAnimate = ... //the thing you want to animate..
var done = false;
var transitionEnded = function(){
done = true;
//do your transition finished stuff..
...
Real differences between “java -server” and “java -client”?
...o a -server application. For instance, on my Linux system, I get:
$ java -XX:+PrintFlagsFinal -version 2>&1 | grep -i -E 'heapsize|permsize|version'
uintx AdaptivePermSizeWeight = 20 {product}
uintx ErgoHeapSizeLimit = 0 {product}...
Convert pem key to ssh-rsa format
...ey from the PEM formatted RSA pair
in PEM format:
openssl rsa -in dummy-xxx.pem -pubout
in OpenSSH v2 format see:
ssh-keygen -y -f dummy-xxx.pem
Notes
OS and software version:
[user@test1 ~]# cat /etc/redhat-release ; uname -a ; openssl version
CentOS release 6.5 (Final)
Linux test1.exampl...