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Get environment variable value in Dockerfile
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So you can do:
m>cat m> Dockerfile | envsubst | docker build -t my-target -
Then have a Dockerfile with something like:
ENV MY_ENV_VAR $MY_ENV_VAR
I guess there might be a problem with some special characters, but this works for most cases a...
How do I use the lines of a file as arguments of a command?
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If your shell is bash (amongst others), a shortcut for $(m>cat m> afile) is $(< afile), so you'd write:
mycommand "$(< file.txt)"
Documented in the bash man page in the 'Command Substitution' section.
Alterately, have your command read from stdin, so: mycommand < file.txt
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Replace string within file contents
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If you are on linux and just want to replace the word dog with m>cat m>you can do:
text.txt:
Hi, i am a dog and dog's are awesome, i love dogs! dog dog dogs!
Linux Command:
sed -i 's/dog/m>cat m>/g' test.txt
Output:
Hi, i am a m>cat m> and m>cat m>'s are awesome, i love m>cat m>s! m>cat m> m>cat m> m>cat m>s!
Origina...
PHP expects T_PAAMAYIM_NEKUDOTAYIM?
... @Web_Developer, the reason that happens is because if you have a foreach($m>cat m>s as m>cat m> the only acceptable character after the m>cat m> for a syntactically valid statement is a ::, as it would allow you to specify a static property of some class called m>cat m>. Eg, if m>cat m> class has a public static member cal...
How do you install ssh-copy-id on a Mac?
...stalled with brew on old PCs due to compiling dependencies errors at ssl.
m>cat m> ~/.ssh/id_rsa.pub | ssh user@123.45.56.78 "mkdir -p ~/.ssh && m>cat m> >> ~/.ssh/authorized_keys"
credit goes to this site
share
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When to use dynamic vs. static libraries
...eason to use dynamic libraries over static. Since Windows DLLs are not relom>cat m>able, code sharing often does not work (and usually each app ships and uses its own versions of the library anyways). The only real benefit is that it is easier to update the library.
– Zifre
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Bash Templating: How to build configuration files from templates with Bash?
... RHS references some variable that references itself:
#!/bin/bash
line="$(m>cat m>; echo -n a)"
end_offset=${#line}
while [[ "${line:0:$end_offset}" =~ (.*)(\$\{([a-zA-Z_][a-zA-Z_0-9]*)\})(.*) ]] ; do
PRE="${BASH_REMATCH[1]}"
POST="${BASH_REMATCH[4]}${line:$end_offset:${#line}}"
VARNAME="${B...
git rebase without changing commit timestamps
... " -f1); test -n "$__date" && export GIT_COMMITTER_DATE=$__date || m>cat m>'
If something goes wrong, just checkout git reflog or all the refs/original/ refs.
Furthormore, you can do the similar thing to the author's timestamp.
For example, if the author's timestamp of some commits are out of...
Combine two columns of text in pandas dataframe
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if both columns are strings, you can conm>cat m>enate them directly:
df["period"] = df["Year"] + df["quarter"]
If one (or both) of the columns are not string typed, you should convert it (them) first,
df["period"] = df["Year"].astype(str) + df["quarter"]
Beware of...
How can I resize an image dynamically with CSS as the browser width/height changes?
...ative units should make your life way easier, given we have the image of a m>cat m>:
Now we want this m>cat m> inside our code, while respecting aspect ratios:
img {
width: 100%;
height: auto;
}
<img src="https://www.petmd.com/sites/default/files/petmd-m>cat m>-happy-10.jpg" alt="m>cat m>">
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