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Getting value of select (dropdown) before change
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I don't agree with this solution. If you change the value once it will work but if you do it one more time it won't. You have to click somewhere to loose focus and another click on the dropdown. I suggest: $("#dropdownId").on('change', function () { ...
@Media min-width & max-width
...nd (device-width: 768px) {
/* default iPad screens */
}
/* different techniques for iPad screening */
@media only screen and (min-device-width: 481px) and (max-device-width: 1024px) and (orientation:portrait) {
/* For portrait layouts only */
}
@media only screen an...
Download JSON object as a file from browser
... dataStr = "data:text/json;charset=utf-8," + encodeURIComponent(JSON.stringify(storageObj));
var dlAnchorElem = document.getElementById('downloadAnchorElem');
dlAnchorElem.setAttribute("href", dataStr );
dlAnchorElem.setAttribute("download", "scene.json");
dlAnchorElem.click();
In this cas...
How do I remove newlines from a text file?
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tr -d '\n' < yourfile.txt
Edit:
If none of the commands posted here are working, then you have something other than a newline separating your fields. Possibly you have DOS/Windows line endings in the file (although I would expect the Perl solutions to work ...
Remove all occurrences of char from string
...ent is regular expression, sometimes it won't work as expected, especially if this string comes from user input.
– vbezhenar
Jul 4 '12 at 8:50
9
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What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
...rname $(which gcc)))/lib using back quotes. Even before you get into the difficulties of doing it in Markdown, it is harder because you have to escape the backquotes of the nested commands, whereas you don't with the $(...) notation.
– Jonathan Leffler
Aug 1 '...
Change the image source on rollover using jQuery
...on() {
var src = $(this).attr("src").match(/[^\.]+/) + "over.gif";
$(this).attr("src", src);
})
.mouseout(function() {
var src = $(this).attr("src").replace("over.gif", ".gif");
$(this).attr("src", src);
});
});
For those tha...
comparing sbt and Gradle [closed]
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Note that one key difference between SBT and Gradle is its dependency management:
SBT: Ivy, with a a revision which can be given as a fixed one (1.5.2, for instance) or as latest (or dynamic) one.
See "Ivy Dependency"
That means the "-SNAPSHOT...
Automatically import modules when entering the python or ipython interpreter
...e environment variable PYTHONSTARTUP. From the official documentation:
If this is the name of a readable file, the Python commands in that
file are executed before the first prompt is displayed in interactive
mode. The file is executed in the same namespace where interactive
commands are e...
Generating a SHA-256 hash from the Linux command line
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If you have installed openssl, you can use:
echo -n "foobar" | openssl dgst -sha256
For other algorithms you can replace -sha256 with -md4, -md5, -ripemd160, -sha, -sha1, -sha224, -sha384, -sha512 or -whirlpool.
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