大约有 40,000 项符合查询结果（耗时：0.0563秒） [XML]
Removing leading zeroes from a field in a SQL statement
I am working on a SQL query that reads from a SQLServer database to produce an extract file. One of the requirements to remove the leading zeroes from a particular field, which is a simple VARCHAR(10) field. So, for example, if the field contains '00001A', the SELECT statement needs to return the...
Why is setTimeout(fn, 0) sometimes useful?
...tion that is shared with page rendering. In effect, running JavaScript blocks the updating of the DOM.
Your workaround was:
setTimeout(callback, 0)
Invoking setTimeout with a callback, and zero as the second argument will schedule the callback to be run asynchronously, after the shortest possibl...
Concept behind these four lines of tricky C code
Why does this code give the output C++Sucks ? What is the concept behind it?
9 Answers
...
Days between two dates? [duplicate]
...t;>> a-b
datetime.timedelta(7)
>>> (a-b).days
7
And it works with datetimes too — I think it rounds down to the nearest day:
>>> from datetime import datetime
>>> a = datetime(2011,11,24,0,0,0)
>>> b = datetime(2011,11,17,23,59,59)
>>> a-b
date...
How to remove the lines which appear on file B from another file A?
... 20 '19 at 13:32
Chris Stryczynski
16.2k2121 gold badges8383 silver badges166166 bronze badges
answered Dec 6 '10 at 12:53
...
How to move one word left in the vi editor
...
Use b to move back one word.
Use w to move forward one word.
And here is a cheat sheet that might be useful for you:
Source: Graphical vi-vim Cheat Sheet and Tutorial
...
Why is division in Ruby returning an integer instead of decimal value?
...
It’s doing integer division. You can make one of the numbers a Float by adding .0:
9.0 / 5 #=> 1.8
9 / 5.0 #=> 1.8
share
|
improve this answer
...
How to change an input button image using CSS?
...
If you're wanting to style the button using CSS, make it a type="submit" button instead of type="image". type="image" expects a SRC, which you can't set in CSS.
Note that Safari won't let you style any button in the manner you're looking for. If you need Safari support, you'...
How to format a JavaScript date
...y: '2-digit' }).format(d);
console.log(`${da}-${mo}-${ye}`);
When working with dates and times, it is usually worth using a library (eg.
moment.js, luxon) because of the many hidden complexities of the
field.
Note that the ECMAScript Internationalization API, used in the solutions above
is not...
How do you change the size of figures drawn with matplotlib?
... figure
figure(num=None, figsize=(8, 6), dpi=80, facecolor='w', edgecolor='k')
figure(figsize=(1,1)) would create an inch-by-inch image, which would be 80-by-80 pixels unless you also give a different dpi argument.
share
...