大约有 5,100 项符合查询结果（耗时：0.0295秒） [XML]
Difference between Groovy Binary and Source release?
...
The source release is the raw, uncompiled code. You could read it yourself. To use it, it must be compiled on your machine. Binary means the code was compiled into a machine language format that the computer can read, then execute. No human can unders...
Advantage of switch over if-else statement
...l throw an exception on out-of-bounds values. (bitset::operator[] doesn't range-check). cplusplus.com/reference/bitset/bitset/test. This will probably outperform a compiler-generated jump table implementing switch, esp. in the not-special case where this will be a single not-taken branch.
...
How do I create a datetime in Python from milliseconds?
...ion: "fromtimestamp() may raise ValueError, if the timestamp is out of the range of values supported by the platform C localtime() or gmtime() functions. It’s common for this to be restricted to years in 1970 through 2038." - how long is your code expected to last???
– mike ...
What does the 'b' character do in front of a string literal?
...ore symbols than the b and u that do
other things?
The r prefix creates a raw string (e.g., r'\t' is a backslash + t instead of a tab), and triple quotes '''...''' or """...""" allow multi-line string literals.
share
...
Which MySQL data type to use for storing boolean values
... bit-field
values. A type of BIT(M) enables storage of M-bit values. M can range
from 1 to 64.
Otherwise, according to the MySQL manual you can use BOOL or BOOLEAN, which are at the moment aliases of tinyint(1):
Bool, Boolean: These types are synonyms for TINYINT(1). A value of
zero is considered ...
Set a default font for whole iOS app?
...turn self.font.fontName }
set {
if self.font.fontName.range(of:"Medium") == nil {
self.font = UIFont(name: newValue, size: self.font.pointSize)
}
}
}
@objc var substituteFontNameBold : String {
get { return self.font.fontName...
How to use the “number_to_currency” helper method in the model rather than view?
...ust this one thing” to a bloated model. App helpers in Rails are a junk-drawer, presenters/view-models are easier to manage. I don’t see creating the data for a report and generating the (html|pdf|csv|etc.) view of that data as a single responsibility any more than I do for, e.g., a person and a...
What's the best way to set a single pixel in an HTML5 canvas?
...;
d[3] = a;
myContext.putImageData( id, x, y );
Use fillRect() to draw a pixel (there should be no aliasing issues):
ctx.fillStyle = "rgba("+r+","+g+","+b+","+(a/255)+")";
ctx.fillRect( x, y, 1, 1 );
You can test the speed of these here: http://jsperf.com/setting-canvas-pixel/9 or here h...
Print a string as hex bytes?
....hexlify(b"Hello world !!") to get hex string. b":".join(h[i:i+2] for i in range(0, len(h), 2)) to insert ':' after every two hex digits in it.
– jfs
Mar 12 '14 at 1:17
...
Why split the tag when writing it with document.write()?
...handled differently by user agents. Markup and entities must be treated as raw text and passed to the application as is. The first occurrence of the character sequence "</" (end-tag open delimiter) is treated as terminating the end of the element's content. In valid documents, this would be the e...