An ASCII file might be read or interpreted as having NULL-terminated strings, carriage returns & line-feeds, or other control characters, that are intended to be read and acted on. For example, a text reader might look for a line of text, where a line is “however many characters you see before you get to a … Read more
FFmpeg does not write to a specific log file, but rather sends its output to standard error. To capture that, you need to either capture and parse it as it is generated redirect standard error to a file and read that afterward the process is finished Example for std error redirection: ffmpeg -i myinput.avi {a-bunch-of-important-params} … Read more
Here’s a summary that I have gathered: Usage: chmod <number> <filename> chmod all files to 644 chmod all .htaccess files to 644 chmod all robots.txt files to 644 chmod all directories to 711 chmod all directories with directory listing (.htaccess Options +Indexes) to 755 chmod all directories that users can upload files to, to 755 … Read more
Try this: // To check if File exists in Laravel 5.1 $exists = Storage::disk(‘local’)->has(‘file.jpg’); // To check if File exists in Laravel 5.2 $exists = Storage::disk(‘local’)->exists(‘file.jpg’);
Windows file caching is very effective, especially if you are using Vista or later. TFileStream is a loose wrapper around the Windows ReadFile() and WriteFile() API functions and for many use cases the only thing faster is a memory mapped file. However, there is one common scenario where TFileStream becomes a performance bottleneck. That is … Read more
Below code can be used to display the uncommon fields in two files, side by side. sdiff -l file1 file2 | cat -n | grep -v -e ‘($’ Below code will display common fields along with line numbers in the output. diff -y file1 file2 | cat -n | grep -v -e ‘($’
You can ask head to read a number of bytes. For your particular case: $ head -c 8 <file> Or in a variable: foo=$(head -c 8 <file>)
In version 0.19.0 you can use parameter dtype=”category” in read_csv: data=”col1,col2,col3\na,b,1\na,b,2\nc,d,3″ df = pd.read_csv(pd.compat.StringIO(data), dtype=”category”) print (df) col1 col2 col3 0 a b 1 1 a b 2 2 c d 3 print (df.dtypes) col1 category col2 category col3 category dtype: object If want specify column for category use dtype with dictionary: df = pd.read_csv(pd.compat.StringIO(data), … Read more
You can pipe it in: kafka-console-producer.sh –broker-list localhost:9092 –topic my_topic –new-producer < my_file.txt Found here. From 0.9.0: kafka-console-producer.sh –broker-list localhost:9092 –topic my_topic < my_file.txt
If you generated a key pair you should have two files id_rsa and id_rsa.pub (note that id_rsa may be replaced by an other name if you specified it). The public key (so the *.pub file) is the one which is meant to be shared so this is the one you should send to your customer. … Read more