大约有 46,000 项符合查询结果（耗时：0.0556秒） [XML]
In where shall I use isset() and !empty()
...ty
FTA:
"isset() checks if a variable has a
value including (False, 0 or empty
string), but not NULL. Returns TRUE
if var exists; FALSE otherwise.
On the other hand the empty() function
checks if the variable has an empty
value empty string, 0, NULL or
False. Returns FALSE if v...
Javascript and regex: split string and keep the separator
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106
Use (positive) lookahead so that the regular expression asserts that the special character exis...
Check if UIColor is dark or bright?
...o use is ((Red value * 299) + (Green value * 587) + (Blue value * 114)) / 1000.
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How to add item to the beginning of List?
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Use the Insert method:
ti.Insert(0, initialItem);
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Achieving bright, vivid colors for an iOS 7 translucent UINavigationBar
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iOS 7.0.3 UPDATE: As you see above 7.0.3 changed things. I've updated my gist. Hopefully this will just go away as people upgrade.
Original Answer:
I ended up with a hack combining the two of the other answers. I'm subclassing UIN...
“Origin null is not allowed by Access-Control-Allow-Origin” error for request made by application ru
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edited Apr 8 '12 at 16:00
answered Sep 19 '10 at 6:06
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Generate random int value from 3 to 6
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10 Answers
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Java 8 Stream and operation on arrays
... a = ...
int[] b = ...
int[] result = new int[a.length];
IntStream.range(0, a.length)
.forEach(i -> result[i] = a[i] * b[i]);
EDIT
Commenter @Holger points out you can use the map method instead of forEach like this:
int[] result = IntStream.range(0, a.length).map(i -> a[i] * b[...
Rolling median algorithm in C
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edited Dec 12 '14 at 17:05
Josh O'Brien
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a...
Python Progress Bar
... something very simple would do:
import time
import sys
toolbar_width = 40
# setup toolbar
sys.stdout.write("[%s]" % (" " * toolbar_width))
sys.stdout.flush()
sys.stdout.write("\b" * (toolbar_width+1)) # return to start of line, after '['
for i in xrange(toolbar_width):
time.sleep(0.1) # do ...