大约有 47,000 项符合查询结果（耗时：0.0513秒） [XML]
Replacing blank values (white space) with NaN in pandas
...
207
I think df.replace() does the job, since pandas 0.13:
df = pd.DataFrame([
[-0.532681, 'foo...
How to merge 2 JSON objects from 2 files using jq?
... given two objects, it will merge them recursively. For example,
jq -s '.[0] * .[1]' file1 file2
Important: Note the -s (--slurp) flag, which puts files in the same array.
Would get you:
{
"value1": 200,
"timestamp": 1382461861,
"value": {
"aaa": {
"value1": "v1",
"value2"...
PHP Function Comments
...
answered Aug 21 '09 at 4:10
Josh LeitzelJosh Leitzel
13.6k1010 gold badges5555 silver badges7676 bronze badges
...
Does Ruby regular expression have a not match operator like “!~” in Perl?
... from the documentation page of Regexp. Nevertheless, it works:
irb(main):001:0> 'x' !~ /x/
=> false
irb(main):002:0> 'x' !~ /y/
=> true
share
|
improve this answer
|
...
How do you downgrade rubygems?
I have rubygems 1.3.1 installed but I want to go back to 1.2.0. What's the command to downgrade rubygems?
6 Answers
...
Python, remove all non-alphabet chars from string
...
answered Mar 20 '14 at 0:36
limasxgoesto0limasxgoesto0
3,47344 gold badges2424 silver badges3636 bronze badges
...
WPF ToolBar: how to remove grip and overflow
...
answered Jun 26 '09 at 20:57
rmoorermoore
14.2k44 gold badges5656 silver badges5959 bronze badges
...
Tetris-ing an array
...
answered Jul 18 '10 at 13:05
starbluestarblue
50.3k1414 gold badges8484 silver badges142142 bronze badges
...
Set operations (union, intersection) on Swift array?
...tring> = Set(array1)
let set2:Set<String> = Set(array2)
Swift 3.0+ can do operations on sets as:
firstSet.union(secondSet)// Union of two sets
firstSet.intersection(secondSet)// Intersection of two sets
firstSet.symmetricDifference(secondSet)// exclusiveOr
Swift 2.0 can calculate on ar...
What's the fastest way to convert String to Number in JavaScript?
...
There are 4 ways to do it as far as I know.
Number(x);
parseInt(x, 10);
parseFloat(x);
+x;
By this quick test I made, it actually depends on browsers.
http://jsperf.com/best-of-string-to-number-conversion/2
Implicit marked the fastest on 3 browsers, but it makes the code hard to read… S...