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If you open a *.gif file with notepad the file starts with GIF89
but for the *.jpeg files the first characters aren't something like GIF89
How can I detect that my file is *.jpeg with it's file first characters?
According to The JPEG File Interchange Format:
(After a 2 byte "SOI" marker...)
the next 2 bytes will be 0xFFE0
the next 2 bytes are unimportant for this detection
the next 5 bytes will be "JFIF" (including the null-terminator)
Related
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In a text with many lines in notepad++, some lines are unintentionally broken into the next line without an end point. I want to merge lines that are more than 10 characters long that do not end with a dot(.) with of regex. Also put a space between merged lines.
For example, the following text:
tttttttttt
aaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbbb.
ccccccccccccccccc
dddddddddddddddddd.
Convert to:
tttttttttt
aaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbb.
ccccccccccccccccc dddddddddddddddddd.
I also tried the following regex code but it didn't work:
[^\.]\n
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I have list of packages like this (it's bigger than this):
accounts-qml-module-0.7-3
accountsservice-0.6.55-3
alsa-firmware-1.2.1-2
alsa-oss-1.1.8-3
alsa-plugins-1:1.2.2-2
alsa-utils-1.2.3-2
augeas-1.12.0-2
baloo-5.74.0-1
baloo-widgets-20.08.1-1
binutils-2.35-2
breath2-icon-themes-1.0.10-2
breath2-wallpaper-1.0.10-2
bridge-utils-1.7-1
brltty-6.0-11
cfitsio-1:3.49-1
clucene-2.3.3.4-11
colord-sane-1.4.4+9+g1ce26da-2
confuse-3.3-1
containerd-1.4.1-1
convertlit-1.8-10
cpio-2.13-2
cracklib-2.9.7-2
cronie-1.5.5-1
cups-2.3.3-3
cups-filters-1.28.3-1
cups-pdf-3.0.1-5
cups-pk-helper-0.2.6-4
debootstrap-1.0.123-1
dhcpcd-9.2.0-1
diffutils-3.7-3
ding-libs-0.6.1-3
discount-2.2.7-1
djvulibre-3.5.27-6
dkms-2.8.3-1.1
docbook-xml-4.5-9
docbook-xsl-1.79.2-7
I'd like to have:
accounts-qml-module
accountsservice
alsa-firmware
alsa-oss
alsa-plugins
alsa-utils
augeas
baloo
baloo-widgets
but I don't really know how to do since there are some packets that have a "-" dash inside and I'm very confused about how could I achieve this avoiding to do it manually...
Is there a bash "trick" to do it?
try this regex :
^.+?(?=-[\d.\-:+]+)
demo
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I have the STRING - TX1234XT batch 44, 1111ABCDEF
TX1234XT (Can be different length)
batch 44 (number can be different length)
ABCDEF (can be a different length, but always have 1111 at the start)
What I need is to generate two columns:
BatchNumber Name
44 1111ABCDEF
1 1111SAMPLE
999 1111Example
Starting point:
First is done:
REGEXP_EXTRACT(reference, r'1111[a-zA-Z0-9_.+-]+') AS Name
Second
- REGEXP_REPLACE(REGEXP_EXTRACT(reference, r'batch [0-9_.+-]+'),r'batch ','') AS BatchNumber
SORTED ^_^
I don't really know Google Big Query, but if you want to extract the batch number and the value at the end, you could go with this regular expression:
/^.*?batch\s*(\d+),\s*(1111.+)$/
(\d+) will capture your batch id.
(1111.+) will capture the value starting with 1111.
Example here: https://regex101.com/r/SJXmIV/2
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how to write a cpp program for replace string using only 1 text file
for example if in text file abc.txt
Hello
how are you
good
bye
i want output like
Hello
how are you
bad
bye
all above thing will be done in text file
Pretty easy. Open the file, get the text. Then iterate throw each word and ask the user if he/she wants to change that word. If yes, write new word on new file. If not, write old word on new file.
Now you just need to translate that to c++
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I'm new to programming, so I was wondering...
If I have an input file consisting of 100 lines, how do I read only up to line 50 and print out each line?
Thanks.
create a fstream object fstream f("filename");
Keep a counter, read lines from file till the counter less than 50
Something like this
counter = 0;
while((counter < 50) && (f.good())
{
getline(f,str);
cout<<str<<endl;
counter++
}
Note: this is not the full code, but guideline how to do.
Please use 'fstream' to read your file and count each 'readline'. Each 'readline' means a full line which terminated with '\n'(return value without it). That should be useful.