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Why does python use 'else' after for and while loops?
...ing.*
So, if the question is, "Why don't they change this keyword?" then Cat Plus Plus probably gave the most accurate answer – at this point, it would be too destructive to existing code to be practical. But if the question you're really asking is why else was reused in the first place, well, a...
App Inventor 2 文本代码块 · App Inventor 2 中文网
...符串，则认为它在ASCII顺序上大于另一个字符串，比如：cat > Cat。
删除空格
删除输入字符串前面或尾部的任何空格并返回结果。注：不会删除中间的任何空格！
大写
返回转换为全部大写的文本字符串的副本。
小写
...
Using SSH keys inside docker container
...tion:
Build command
$ docker build -t example --build-arg ssh_prv_key="$(cat ~/.ssh/id_rsa)" --build-arg ssh_pub_key="$(cat ~/.ssh/id_rsa.pub)" --squash .
Dockerfile
FROM python:3.6-slim
ARG ssh_prv_key
ARG ssh_pub_key
RUN apt-get update && \
apt-get install -y \
git \
...
How can I pretty-print JSON in a shell script?
...atest use-case: Chrome, Dev console, Network tab, export all as HAR file, "cat site.har | underscore select '.url' --outfmt text | grep mydomain"; now I have a chronologically ordered list of all URL fetches made during the loading of my company's site.
Pretty printing is easy:
underscore -i data....
Shell script while read line loop stops after the first line
...
Very useful, helped me to run this zsh oneliner: cat hosts | while read host ; do ssh $host do_something ; done
– rat
Jan 2 '18 at 16:43
...
An example of how to use getopts in bash
...of missing value.
OPTARG - is set to current argument value,
OPTERR - indicates if Bash should display error messages.
So the code can be:
#!/usr/bin/env bash
usage() { echo "$0 usage:" && grep " .)\ #" $0; exit 0; }
[ $# -eq 0 ] && usage
while getopts ":hs:p:" arg; do
case $ar...
Declare and Initialize String Array in VBA
...
Try this:
Dim myarray As Variant
myarray = Array("Cat", "Dog", "Rabbit")
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How to unpack and pack pkg file?
...dit the installable files:
mkdir Foo
cd Foo
xar -xf ../Foo.pkg
cd foo.pkg
cat Payload | gunzip -dc |cpio -i
# edit Foo.app/*
rm Payload
find ./Foo.app | cpio -o | gzip -c > Payload
mkbom Foo.app Bom # or edit Bom
# edit PackageInfo
rm -rf Foo.app
cd ..
xar -cf ../Foo-new.pkg
I believe you can ...
How to count lines in a document?
...c -l < /dir/file.txt
3272485
You can also pipe data to wc as well:
$ cat /dir/file.txt | wc -l
3272485
$ curl yahoo.com --silent | wc -l
63
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...
`Apache` `localhost/~username/` not working
...bin}:"
echo "INFO: ${bin}: check that this looks OK"
echo "INFO: ${bin}: % cat /private/etc/apache2/extra/httpd-userdir.conf"
echo "INFO: ${bin}:"
cat /private/etc/apache2/extra/httpd-userdir.conf
echo "INFO: ${bin}:"
echo "INFO: ${bin}: in particular, that '/private/etc/apache2/users/*.conf' files ...