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How to sort strings in JavaScript
...order"
When "playing" with these implementations, I always noticed some strange "natural sorting order" choice, or rather mistakes (or omissions in the best cases).
Typically, special characters (space, dash, ampersand, brackets, and so on) are not processed correctly.
You will then find them app...
What is the difference between --save and --save-dev?
...s are specified in a simple object that maps a package name
to a version range. The version range is a string which has one or
more space-separated descriptors. Dependencies can also be identified
with a tarball or git URL.
Please do not put test harnesses or transpilers in your dependenc...
Should I always return IEnumerable instead of IList?
...able, prefer returning IList. This ensures that it is usable by the widest range of consumers.
Be loose in what you require, and explicit in what you provide.
share
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improve this answer
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Check for column name in a SqlDataReader object
...tOrdinal("columnName") on your DataReader up front, and catch an IndexOutOfRangeException in case the column isn't present.
In fact, let's make an extension method:
public static bool HasColumn(this IDataRecord r, string columnName)
{
try
{
return r.GetOrdinal(columnName) >= 0;
...
Find the division remainder of a number
...'s because Python's % performs a true modulus, which returns values on the range [0, divisor) and pairs well with floored division (towards negative infinity). C languages use the % operator for remainder operations which returns values on the range (-divisor, divisor) and pairs well with standard d...
How to round to 2 decimals with Python?
...an to 0.53, so rounding to 0.54 makes sense.
– ShadowRanger
Nov 19 '19 at 18:20
"{:0.2f}".format(1.755) -> 1.75 "{:...
How can I replace a newline (\n) using sed?
...retrieve the lines from the hold space
with x, g, or G; or (3) use address ranges (see section 3.3, above)
to match lines between two specified addresses.
Choices (1) and (2) will put an \n into the pattern space, where it
can be addressed as desired ('s/ABC\nXYZ/alphabet/g'). One example
of using '...
Favourite performance tuning tricks [closed]
...x are matched in the query
Are clustered indices used where appropriate?
range data
WHERE field between value1 and value2
Small Joins are Nice Joins
By default the optimiser will only consider the tables 4 at a time.
This means that in joins with more than 4 tables, it has a good chance of c...
Check if a given key already exists in a dictionary
...you wanted a default, you can always use dict.get():
d = dict()
for i in range(100):
key = i % 10
d[key] = d.get(key, 0) + 1
and if you wanted to always ensure a default value for any key you can either use dict.setdefault() repeatedly or defaultdict from the collections module, like so:...
What are the most-used vim commands/keypresses?
...obal
:%s/foo/bar/g substitute all occurrences of "foo" to "bar"
% is a range that indicates every line in the file
/g is a flag that changes all occurrences on a line instead of just the first one
Searching
/ search forward; ? search backward
* search forward for word under cursor; # search...