大约有 47,000 项符合查询结果（耗时：0.0722秒） [XML]
Javascript: How to check if a string is empty? [duplicate]
...
150
I check length.
if (str.length == 0) {
}
...
Confused by python file mode “w+”
...en('somefile.txt', 'w+') as f:
# Note that f has now been truncated to 0 bytes, so you'll only
# be able to read data that you write after this point
f.write('somedata\n')
f.seek(0) # Important: return to the top of the file before reading, otherwise you'll just read an empty string...
Incrementing a date in JavaScript
...saving time; Clever Human pointed out that it would fail with November 7, 2010 in the Eastern timezone). Instead, Jigar's answer is the correct way to do this without a library:
var tomorrow = new Date();
tomorrow.setDate(tomorrow.getDate() + 1);
This works even for the last day of a month (or ye...
HTML 5 strange img always adds 3px margin at bottom [duplicate]
...
BrilliandBrilliand
11.5k66 gold badges4040 silver badges5252 bronze badges
16
...
Hello World in Python [duplicate]
...
print("Hello, World!")
You are probably using Python 3.0, where print is now a function (hence the parenthesis) instead of a statement.
share
|
improve this answer
|
...
What does ~> mean in a gem file [duplicate]
...d, but it limits versions to a subset of the possible versions. So ~> 2.0.0 means ">= 2.0.0 and < 2.1.0" in version numbers.
1.2.3 seems to be the latest version of Formtasic, that's why you're getting this error message.
...
C语言判断文件是否存在 - C/C++ - 清泛网 - 专注C/C++及内核技术
...io.h，原型：int access(const char *filename, int amode);amode参数为0时表示检查文件的存在性，如果文件存...用函数access，头文件是io.h，原型：
int access(const char *filename, int amode);
amode参数为0时表示检查文件的存在性，如果文件存在，返...
iOS 7 - Status bar overlaps the view
...cifically made to resolve this issue. In the storyboard, I moved my views 20 pixels down to look right on iOS 7 and in order to make it iOS 6 compatible, I changed Delta y to -20.
Since my storyboard is not using auto-layout, in order to resize the height of views properly on iOS 6 I had to se...
RVM is not a function, selecting rubies with 'rvm use …' will not work
...
answered May 30 '14 at 20:42
BroiSatseBroiSatse
38k77 gold badges4848 silver badges7777 bronze badges
...
Is there a “do … until” in Python? [duplicate]
...|
edited Jun 21 '15 at 22:04
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
...