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How to count duplicate value in an array in javascript
...nt = 0;
for (var i = 0; i < array_elements.length; i++) {
if (array_elements[i] != current) {
if (cnt > 0) {
document.write(current + ' comes --> ' + cnt + ' times<br>');
}
current = array_elements[i];
...
How do I retrieve the number of columns in a Pandas data frame?
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@mkln if you post df.shape[1] as an answer, I'd +1. This is the better way to work with numpy and deserves to be a separate answer.
– Phil Cooper
Nov 30 '13 at 16:59
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BigDecimal equals() versus compareTo()
... Unlike compareTo, this method considers two BigDecimal objects equal only if they are equal in value and scale (thus 2.0 is not equal to 2.00 when compared by this method).
In other words: equals() checks if the BigDecimal objects are exactly the same in every aspect. compareTo() "only" compares ...
LINQ Aggregate algorithm explained
...lain the use of Aggregate which was the intention of this answer. However, if using this technique to actually create a large amount of comma separated data, it would be more appropriate to use a StringBuilder, and this is entirely compatible with Aggregate using the seeded overload to initiate the ...
Can't connect to local MySQL server through socket '/tmp/mysql.sock
...cal/mysql/support-files/mysql.server start
This worked for me. However, if this doesnt work then make sure that mysqld is running and try connecting.
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Passing a function with parameters as a parameter?
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If you're wanting to call a function on an object, you need to call bind(). myObj.click( function() { this.doSomething(); }.bind( myObj ) ); That will make "this" be myObj.
– Eli
Oct 3 '...
Jackson overcoming underscores in favor of camel-case
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@RyanShillington - Correct me if I'm wrong, but this is your only option if the JSON string you are parsing from does not use a consistent format, i.e., uses both camelCase and underscore?
– DavidR
Nov 16 '15 at 23:4...
case-insensitive list sorting, without lowercasing the result?
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In Python 3.3+ there is the str.casefold method that's specifically designed for caseless matching:
sorted_list = sorted(unsorted_list, key=str.casefold)
In Python 2 use lower():
sorted_list = sorted(unsorted_list, key=lambda s: s.lower())
It works for both normal and unicode s...
How to round a number to n decimal places in Java
... convert a double to a string which rounds using the half-up method - i.e. if the decimal to be rounded is 5, it always rounds up to the next number. This is the standard method of rounding most people expect in most situations.
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The purpose of Model View Projection Matrix
... view from world space to camera space, projection from camera to screen.
If you compose all three, you can use the one result to map all the way from object space to screen space, making you able to work out what you need to pass on to the next stage of a programmable pipeline from the incoming ve...