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How to communicate between iframe and the parent site?
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With different domains, it is not possible to call methods or access the iframe's content document directly.
You have to use cross-document messaging.
For example in the top window:
myIframe.contentWindow.postMessage('hello', '*');
and in the iframe:
window.onmessa...
Replacing a char at a given index in string? [duplicate]
...es what I need. I suppose the CPU cost is high, but the string sizes are small so it's all ok
7 Answers
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How can I see the assembly code for a C++ program?
...pid
movl %eax, 4(%esp) # pid,
movl $.LC0, (%esp) #,
call printf #
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How to duplicate a whole line in Vim?
... To copy two lines, it's even faster just to go yj or yk, especially since you don't double up on one character. Plus, yk is a backwards version that 2yy can't do, and you can put the number of lines to reach backwards in y9j or y2k, etc.. Only difference is that your count has to be n-1 ...
C++, What does the colon after a constructor mean? [duplicate]
...e the demo class is being constructed. For instance:
class Demo{
int foo;
public:
Demo(){ foo = 1;}
};
Would first place a value in foo before setting it to 1. It's slightly faster and more efficient.
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Call a function after previous function is complete
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Specify an anonymous callback, and make function1 accept it:
$('a.button').click(function(){
if (condition == 'true'){
function1(someVariable, function() {
function2(someOtherVariable);
});
}
else {
d...
Variable name as a string in Javascript
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Typically, you would use a hash table for a situation where you want to map a name to some value, and be able to retrieve both.
var obj = { myFirstName: 'John' };
obj.foo = 'Another name';
for(key in obj)
console.log(k...
How do you create a Distinct query in HQL
...ll just pull the data from the database to the memory with repetitions and all, and then discard the repetitions afterwards; depending on how often the data repeats, that can increase the I/O operations quite a lot.
– Haroldo_OK
Jan 21 '19 at 11:49
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Is there shorthand for returning a default value if None in Python? [duplicate]
...lue
Example:
In [22]: x = None
In [23]: print x if x is not None else "foo"
foo
In [24]: x = "bar"
In [25]: print x if x is not None else "foo"
bar
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R: Comment out block of code [duplicate]
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A sort of block comment uses an if statement:
if(FALSE) {
all your code
}
It works, but I almost always use the block comment options of my editors (RStudio, Kate, Kwrite).
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