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What columns generally make good indexes?
...re I am attempting to learn about indexes, what columns are good index candidates? Specifically for an MS SQL database?
12 ...
Minimum and maximum date
...ing a particular instant in time to within a millisecond. Such a Number is called a time value. A time value may also be NaN, indicating that the Date object does not represent a specific instant of time.
Time is measured in ECMAScript in milliseconds since 01 January, 1970 UTC. In time values leap ...
BigDecimal equals() versus compareTo()
...nflate() method on equals() method. What does inflate() do actually?
Basically, inflate() calls BigInteger.valueOf(intCompact) if necessary, i.e. it creates the unscaled value that is stored as a BigInteger from long intCompact. If you don't need that BigInteger and the unscaled value fits into a ...
How to get and set the current web page scroll position?
...
I went with the HTML5 local storage solution... All my links call a function which sets this before changing window.location:
localStorage.topper = document.body.scrollTop;
and each page has this in the body's onLoad:
if(localStorage.topper > 0){
window.scrollTo(0,localSt...
Python Pandas merge only certain columns
...ge selected columns from two tables.
If table_1 contains t1_a,t1_b,t1_c..,id,..t1_z columns,
and table_2 contains t2_a, t2_b, t2_c..., id,..t2_z columns,
and only t1_a, id, t2_a are required in the final table, then
mergedCSV = table_1[['t1_a','id']].merge(table_2[['t2_a','id']], on = 'id',how = '...
Convert Object to JSON string
...
jQuery does only make some regexp checking before calling the native browser method window.JSON.parse(). If that is not available, it uses eval() or more exactly new Function() to create a Javascript object.
The opposite of JSON.parse() is JSON.stringify() which serializes ...
Check if item is in an array / list
...eck to see if a string is in the array without doing a for loop? Specifically, I'm looking for a way to do it within an if statement, so something like this:
...
How to create a temporary directory and get the path / file name in Python
...t be sure to remove (shutil.rmtree) the directory because it's not automatically deleted after use. "The user of mkdtemp() is responsible for deleting the temporary directory and its contents when done with it." See: docs.python.org/2/library/tempfile.html#tempfile.mkdtemp
– Ni...
How do I create a class instance from a string name in ruby?
...space is known ahead of time and highlights the fact that const_get can be called on modules directly as opposed to exclusively on Object.
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int value under 10 convert to string two digit number
...ng)
{
return number.ToString(GetPaddingSequence(padding));
}
Finally call the function FormatNumber
string x = FormatNumber(1,2);
Output will be 01 which is based on your padding parameter. Increasing it will increase the number of 0s
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