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Dynamically access object property using variable
...ike than array like. You can't iterate the 'associative' version by simple index so it is not displaying array-like behaviour. You can define your 'associative' array as {} or [] and treat it the same in either case as far as random property access is concerned.
– Vanquished Wo...
Array.size() vs Array.length
...uery and many other libraries.
The .length property works only when the index is an integer.
The length property will work with this type of array:
var nums = new Array();
nums[0] = 1;
nums[1] = 2;
print(nums.length); // displays 2
The length property won't work with this type of array:
var...
Python extract pattern matches
...m regex. search for the pattern, if found, retrieve the string using group(index). Assuming valid checks are performed:
>>> p = re.compile("name (.*) is valid")
>>> result = p.search(s)
>>> result
<_sre.SRE_Match object at 0x10555e738>
>>> result.group(1) ...
History or log of commands executed in Git
...
git will show changes in commits that affect the index, such as git rm. It does not store a log of all git commands you execute.
However, a large number of git commands affect the index in some way, such as creating a new branch. These changes will show up in the commit hi...
Rearrange columns using cut
...)
-a means split such lines to a vector called @F ("F" - like Field). Perl indexes vectors starting from 0 unlike cut which indexes fields starting form 1.
You can add -F pattern (with no space between -F and pattern) to use pattern as a field separator when reading the file instead of the default w...
json_encode/json_decode - returns stdClass instead of Array in PHP
...gs ([] = array).
JSON (as JavaScript) doesn't know associative arrays only indexed arrays. So when JSON encoding a PHP associative array, this will result in a JSON string containing this array as an "object".
Now we're decoding the JSON again using json_decode($arrayEncoded). The decode function do...
Is there a better way to iterate over two lists, getting one element from each list for each iterati
...
what if additionally I want the index i? Can I wrap that zip in enumerate?
– Charlie Parker
Mar 6 '18 at 18:06
1
...
How do I ignore an error on 'git pull' about my local changes would be overwritten by merge?
...s that you already staged - e.g. with git add - then add the option --keep-index. Note however, that this will still prevent merging if those staged changes collide with the ones from upstream.
If you want to overwrite only specific parts of your local changes, there are two possibilities:
Comm...
Replacing blank values (white space) with NaN in pandas
...', 4],
[-1.176781, 'qux', ' '],
], columns='A B C'.split(), index=pd.date_range('2000-01-01','2000-01-06'))
# replace field that's entirely space (or empty) with NaN
print(df.replace(r'^\s*$', np.nan, regex=True))
Produces:
A B C
2000-01-01 -0.532681 foo ...
Regular expression that matches valid IPv6 addresses
...Pv6 addresses (section 2.2 of rfc5952)
link-local IPv6 addresses with zone index (section 11 of rfc4007)
IPv4-Embedded IPv6 Address (section 2 of rfc6052)
IPv4-mapped IPv6 addresses (section 2.1 of rfc2765)
IPv4-translated addresses (section 2.1 of rfc2765)
IPv6 Regular Expression:
(([0-9a-fA-F]...