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Detect if value is number in MySQL
...k in most cases.
SELECT * FROM myTable WHERE concat('',col1 * 1) = col1
It doesn't work for non-standard numbers like
1e4
1.2e5
123. (trailing decimal)
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How to assign a heredoc value to a variable in Bash?
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You can avoid a useless use of cat and handle mismatched quotes better with this:
$ read -r -d '' VAR <<'EOF'
abc'asdf"
$(dont-execute-this)
foo"bar"''
EOF
If you don't quote the variable when you echo it, newlines are lost. Quoting it preserves them:
$ echo "$VAR"
abc'asdf"
$(dont-exec...
Passing a 2D array to a C++ function
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edited Feb 25 '15 at 18:38
Peter Mortensen
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CSS: 100% font size - 100% of what?
...rs as well.
I personally like to control the default font size of my websites, so in a CSS file that is included in every page I will set the BODY default, like so:
body {
font-family: Helvetica, Arial, sans-serif;
font-size: 14px
}
Now the font-size of all my HTML tags will inherit a f...
Is well formed without a ?
Is it valid to have <input> without it being in a <form> ?
7 Answers
7
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How do I copy a string to the clipboard on Windows using Python?
...c Windows application that builds a string out of user input and then adds it to the clipboard. How do I copy a string to the clipboard using Python?
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Google Chrome Printing Page Breaks
...http-equiv="content-type" content="text/html;charset=UTF-8" />
<title>Paginated HTML</title>
<style type="text/css" media="print">
div.page
{
page-break-after: always;
page-break-inside: avoid;
}
</style>
</head>
<...
How to allow to accept only image files?
...ed, so you should always validate the uploaded file on the server also.
It should work in IE 10+, Chrome, Firefox, Safari 6+, Opera 15+, but support is very sketchy on mobiles (as of 2015) and by some reports this may actually prevent some mobile browsers from uploading anything at all, so be sur...
What Are the Differences Between PSR-0 and PSR-4?
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They are very similar so it is not surprising that it's a bit confusing. The summary is that PSR-0 had some backwards compatibility features for PEAR-style classnames that PSR-4 dropped, as such it only supports namespaced code. On top of that PSR-4 ...
Get file version in PowerShell
...omefilepath").FileVersion
Or as noted here on a list of files:
get-childitem * -include *.dll,*.exe | foreach-object { "{0}`t{1}" -f $_.Name, [System.Diagnostics.FileVersionInfo]::GetVersionInfo($_).FileVersion }
Or even nicer as a script: https://jtruher3.wordpress.com/2006/05/14/powershell-an...