大约有 15,482 项符合查询结果（耗时：0.0314秒） [XML]
Save current directory in variable using Bash?
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for a relative answer, use .
test with:
$ myDir=.
$ ls $myDir
$ cd /
$ ls $myDir
The first ls will show you everything in the current directory, the second will show you everything in the root directory (/).
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How to print SQL statement in codeigniter model
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if you need a quick test on your query, this works great for me
echo $this->db->last_query(); die;
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Python's most efficient way to choose longest string in list?
I have a list of variable length and am trying to find a way to test if the list item currently being evaluated is the longest string contained in the list. And I am using Python 2.6.1
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How to get MVC action to return 404
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This doesn't work, I think, if using IIS. On my test site it works fine, but on the live site the custom error page kicks in.
– Andy Brown
Aug 16 '17 at 11:04
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Sharing a URL with a query string on Twitter
...solution.
const query = a=123&b=456;
const url = `https://example.com/test?${encodeURIComponent(encodeURIComponent(query),)}`;
const twitterSharingURL=`https://twitter.com/intent/tweet?&url=${url}`
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Reading a key from the Web.Config using ConfigurationManager
...the value isn't in the app config. Better to trap the object returned and test for null before resolving. Try running it when "mysettings" isn't in the config and you'll see the exception pop. Instead something like whats below might be safer... string key = "mysettings"; ...
Find integer index of rows with NaN in pandas dataframe
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Here are tests for a few methods:
%timeit np.where(np.isnan(df['b']))[0]
%timeit pd.isnull(df['b']).nonzero()[0]
%timeit np.where(df['b'].isna())[0]
%timeit df.loc[pd.isna(df['b']), :].index
And their corresponding timings:
333 µ...
Getting a list item by index
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@Paul McCarthy: you could easily test this yourself, but Yes. A list hold references to objects. Clearing the list does not affect the objects held in it. If there are no other references to those objects, they will be garbage collected at some point in time...
How do JavaScript closures work?
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The simplest example of a closure is this:
var a = 10;
function test() {
console.log(a); // will output 10
console.log(b); // will output 6
}
var b = 6;
test();
When a JavaScript function is invoked, a new execution context ec is created. Together with the function argumen...
How to enable local network users to access my WAMP sites?
...through firewall (recommended).
Or disable your firewall on LAN (just to test, not recommended).
Example with Wamp (with Apache activated):
Check if Wamp is published locally if it is, continue;
Access Control Panel
Click "Firewall"
Click "Allow app through firewall"
Click "Allow some app"
Find...