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How to open a file using the open with statement
... Read a list of names from a file line by line into an output file.
If a line begins with a particular name, insert a string of text
after the name before appending the line to the output file.
'''
with open(newfile, 'w') as outfile, open(oldfile, 'r', encoding='utf-8') as infile...
Is it unnecessary to put super() in constructor?
Isn't this one automatically put by the compiler if I don't put it in a subclass's constructor?
6 Answers
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Undefined method 'task' using Rake 0.9.0
... run my Rake tasks again.
I know that this is not a elegant solution. But if you have to use the --pre version of Rake it might be all right to use this quick hack.
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Default argument values in JavaScript functions [duplicate]
...
In javascript you can call a function (even if it has parameters) without parameters.
So you can add default values like this:
function func(a, b){
if (typeof(a)==='undefined') a = 10;
if (typeof(b)==='undefined') b = 20;
//your code
}
and then you can ca...
How to open a Bootstrap modal window using jQuery?
...l').modal('hide');
You can see more here: Bootstrap modal component
Specifically the methods section.
So you would need to change:
$('#my-modal').modal({
show: 'false'
});
to:
$('#myModal').modal('show');
If you're looking to make a custom popup of your own, here's a suggested video ...
Is there any way to put malicious code into a regular expression?
...mance degradation, but where a Thompson‐style NFA has no such problems.
If you only admit patterns that can be solved by DFAs, you can compile them up as such, and they will run faster, possibly much faster. However, it takes time to do this. The Cox paper mentions this approach and its attendant...
Force “portrait” orientation mode
...entation|keyboardHidden">
</activity>
This is applied in the manifest file AndroidManifest.xml.
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How to implement a rule engine?
... ExpressionType tBinary;
// is the operator a known .NET operator?
if (ExpressionType.TryParse(r.Operator, out tBinary)) {
var right = Expression.Constant(Convert.ChangeType(r.TargetValue, tProp));
// use a binary operation, e.g. 'Equal' -> 'u.Age == 21'
return Exp...
Wrapping synchronous code into asynchronous call
...
It's important to make a distinction between two different types of concurrency. Asynchronous concurrency is when you have multiple asynchronous operations in flight (and since each operation is asynchronous, none of them are actually using a thread). Parallel concurrency is...
Swapping two variable value without using third variable
...
Using the xor swap algorithm
void xorSwap (int* x, int* y) {
if (x != y) { //ensure that memory locations are different
*x ^= *y;
*y ^= *x;
*x ^= *y;
}
}
Why the test?
The test is to ensure that x and y have different memory locations (rather than differe...