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Easiest way to copy a table from one database to another?
What is the best method to copy the data from a table in one database to a table in another database when the databases are under different users?
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Accessing a Dictionary.Keys Key through a numeric index
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As @Falanwe points out in a comment, doing something like this is incorrect:
int LastCount = mydict.Keys.ElementAt(mydict.Count -1);
You should not depend on the order of keys in a Dictionary. If you need ordering, you should use an OrderedDictionary, a...
Extracting an attribute value with beautifulsoup
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.find_all() returns list of all found elements, so:
input_tag = soup.find_all(attrs={"name" : "stainfo"})
input_tag is a list (probably containing only one element). Depending on what you want exactly you either should do:
output = input_tag[0]['value']
or us...
Navigation bar show/hide
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This isn't something that can fit into a few lines of code, but this is one approach that might work for you.
To hide the navigation bar:
[[self navigationController] setNavigationBarHidden:YES animated:YES];
To show it:
[[self navigatio...
What does @media screen and (max-width: 1024px) mean in CSS?
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That’s a media query. It prevents the CSS inside it from being run unless the browser passes the tests it contains.
The tests in this media query are:
@media screen — The browser identifies itself as being in the “screen” cat...
Delete keychain items when an app is uninstalled
...efaults on the first run of your app if it's not already set. There's a comment where you should put code to delete values from the keychain. Synchronize can be called to make sure the "FirstRun" key/value is immediately persisted in case the user kills the app manually before the system persists it...
Textarea to resize based on content length [duplicate]
...and then reading the scrollHeight property:
function textAreaAdjust(element) {
element.style.height = "1px";
element.style.height = (25+element.scrollHeight)+"px";
}
<textarea onkeyup="textAreaAdjust(this)" style="overflow:hidden"></textarea>
It works under Firefox 3, IE 7...
grep a file, but show several surrounding lines?
...nd -A num for the number of lines after the match.
grep -B 3 -A 2 foo README.txt
If you want the same number of lines before and after you can use -C num.
grep -C 3 foo README.txt
This will show 3 lines before and 3 lines after.
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Random date in C#
I'm looking for some succinct, modern C# code to generate a random date between Jan 1 1995 and the current date.
7 Answers
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What does ':' (colon) do in JavaScript?
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var o = {
r: 'some value',
t: 'some other value'
};
is functionally equivalent to
var o = new Object();
o.r = 'some value';
o.t = 'some other value';
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