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Regular expression for floating point numbers
...g a floating point number is
[+-]?([0-9]*[.])?[0-9]+
This will match:
123
123.456
.456
See a working example
If you also want to match 123. (a period with no decimal part), then you'll need a slightly longer expression:
[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)
See pkeller's answer for a fuller...
What are copy elision and return value optimization?
...
when the two objects would have been destroyed without the optimization.123 This elision of copy/move
operations, called copy elision, is permitted in the following circumstances (which may be combined to
eliminate multiple copies):
— in a return statement in a function with a class re...
Convert NaN to 0 in javascript
...ber. This has the added benefit of converting things like numeric strings '123' to a number.
The only unexpected thing may be if someone passes an Array that can successfully be converted to a number:
+['123'] // 123
Here we have an Array that has a single member that is a numeric string. It wi...
How to replace list item in best way
... item.
List<string> listOfStrings = new List<string> {"abc", "123", "ghi"};
listOfStrings[listOfStrings.FindIndex(ind=>ind.Equals("123"))] = "def";
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Output first 100 characters in a string
...o handle this. Here are some examples.
The formatting code '%s' converts '12345' to a string, but it's already a string.
>>> '%s' % '12345'
'12345'
'%.3s' specifies to use only the first three characters.
>>> '%.3s' % '12345'
'123'
'%.7s' says to use the first seven charac...
Add a prefix to all Flask routes
..._ROOT config value to your prefix:
app.config["APPLICATION_ROOT"] = "/abc/123"
@app.route("/")
def index():
return "The URL for this page is {}".format(url_for("index"))
# Will return "The URL for this page is /abc/123/"
Setting the APPLICATION_ROOT config value simply limit Flask's session...
Any way to modify Jasmine spies based on arguments?
...pi, 'get')
.withArgs('abc').and.returnValue('Jane')
.withArgs('123').and.returnValue(98765);
});
});
For Jasmine versions earlier than 3.0 callFake is the right way to go, but you can simplify it using an object to hold the return values
describe('my fn', function() {
var params ...
使用 XML 和 Web 服务 · App Inventor 2 中文网
...evel tag-delimited structure in the input string. For example, decoding
123
returns the list of one pair (hello, 123) and decoding
123
456
returns the list of two pairs (hello, 123) and (goodbye, 456).
For each pair, the first element is the tag, and the second element is the decoding of t...
Can't start site in IIS (use by another process)
... command to find the task from your command prompt:
tasklist /FI "PID eq 123"
Note: change 123 with the PID returned from the first command.
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Good PHP ORM Library?
...roducts'); // Automatically reads the above schema
$product->product_id=123;
$product->description='Sofa bed';
$product->save(); // ORM knows it's a new record
// Retrieve
$product->load('product_id=123');
echo $product->description;
// Update
$product->description='A better sofa...