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In Bash, how do I add a string after each line in a file?
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Pure POSIX shell and sponge:
suffix=foobar
while read l ; do printf '%s\n' "$l" "${suffix}" ; done < file |
sponge file
xargs and printf:
suffix=foobar
xargs -L 1 printf "%s${suffix}\n" < file | sponge file
Using join:
suffix=foobar
join file file -e "${suffix}" ...
How to force file download with PHP
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Read the docs about built-in PHP function readfile
$file_url = 'http://www.myremoteserver.com/file.exe';
header('Content-Type: application/octet-stream');
header("Content-Transfer-Encoding: Binary");
header("Content-disposi...
Is it ever advantageous to use 'goto' in a language that supports loops and functions? If so, why?
...r using the "goto" statement that I'm aware of (some have spoken to this already):
Cleanly exiting a function
Often in a function, you may allocate resources and need to exit in multiple places. Programmers can simplify their code by putting the resource cleanup code at the end of the function, a...
Using setImageDrawable dynamically to set image in an ImageView
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However using setImageResource() "does Bitmap reading and decoding on the UI thread, which can cause a latency hiccup ... consider using setImageDrawable() or setImageBitmap()." (Android documentation)
– chetto
Oct 25 '12 at 18:30
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How to call Android contacts list?
...here are three steps to this process.
1. Permissions
Add a permission to read contacts data to your application manifest.
<uses-permission android:name="android.permission.READ_CONTACTS"/>
2. Calling the Contact Picker
Within your Activity, create an Intent that asks the system to find a...
One SVN repository or many?
...e a TAG
Commit messages are easily filtered by path in the repository, so reading only those related to a particular project is a trivial exercise.
Edit: See Blade's response for details on using a single authorization/authentication configuration for SVN.
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constant pointer vs pointer on a constant value [duplicate]
...ecause these sit to the right of the variable name) this becomes a case of reading from right-to-left.
So with char *const a; you have a, which is a const pointer (*) to a char. In other words you can change the char which a is pointing at, but you can't make a point at anything different.
Convers...
Exploitable PHP functions
...d RATS. I have also added some of my own to the mix and people on this thread have helped out.
Edit: After posting this list I contacted the founder of RIPS and as of now this tools searches PHP code for the use of every function in this list.
Most of these function calls are classified as Sinks...
List comprehension vs map
... kibash on Alex's infinite style points, but sometimes map seems easier to read to me: data = map(str, some_list_of_objects). Some other ones... operator.attrgetter, operator.itemgetter, etc.
– Gregg Lind
Aug 8 '09 at 16:06
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我帮儿子用App Inventor 2给遥控车装了"蓝牙大脑"，手机一划车就...
...：
if (Serial.available() >= 4) {
byte speed = Serial.read();
byte steer = Serial.read();
byte checksum = Serial.read();
byte footer = Serial.read();
if (footer == 0xFF && (speed ^ steer) == checksum) {
an...