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Appending a line to a file only if it does not already exist
...oo.bar
-q be quiet
-x match the whole line
-F pattern is a plain string
https://linux.die.net/man/1/grep
Edit:
incorporated @cerin and @thijs-wouters suggestions.
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Installing in Homebrew errors
...wn will not work:
sudo chown -R $(whoami) $(brew --prefix)/*
Link:
https://github.com/Homebrew/brew/issues/3228
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Edit line thickness of CSS 'underline' attribute
...derline, or overline.
a {
text-decoration-thickness: 2px;
}
Codepen: https://codepen.io/mrotaru/pen/yLyLOgr (Firefox only)
There's also text-decoration-color, which is part of CSS Text Decoration Module Level 3. This is more mature (Candidate Recommendation) and is supported in most major b...
How to determine device screen size category (small, normal, large, xlarge) using code?
... of an Android device, you can use this free app (no permission required):
https://market.android.com/details?id=com.jotabout.screeninfo
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How do I convert dates in a Pandas data frame to a 'date' data type?
...lso add , index_col=0 in there if you want the date to be your index.
See https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.read_csv.html
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Export Data from mysql Workbench 6.0
...und it by editing and saving it in notepad++.One can download it from here https://notepad-plus-plus.org/
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How can I get Docker Linux container information from within the container itself?
...ocker from inside of a container using unix socket via Docker Remote API:
https://docs.docker.com/engine/reference/api/docker_remote_api/
In a container, you can find out a shortedned docker id by examining $HOSTNAME env var.
According to doc, there is a small chance of collision, I think that for...
How to write an inline IF statement in JavaScript?
...he value is false.
This is known as a Conditional (ternary) Operator.
https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Conditional_Operator
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How to pass variable number of arguments to a PHP function
... provide argument validation.
For that, anyone can use my expect function: https://gist.github.com/iautomation/8063fc78e9508ed427d5
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Why do I get “'property cannot be assigned” when sending an SMTP email?
...
First go to https://myaccount.google.com/lesssecureapps and make Allow less secure apps true.
Then use the below code. This below code will work only if your from email address is from gmail.
static void SendEmail()
{
strin...