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configure: error: C compiler cannot create executables
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You have an old set of developer tools. gcc is reporting its version as 4.0.1. This may be left over from migrating from an older version of the OS. If you've installed Xcode 4.3.x, you need to launch it, go into its preferences, select the Downloads tab, and click "Install" next to the Command L...
How to get the position of a character in Python?
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L S
2,55933 gold badges2727 silver badges4141 bronze badges
answered Feb 19 '10 at 6:35
Eli BenderskyEli Bendersky
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海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...前的量级和未来的增长，2天大概在2000w — 5000w 中间。
4、短文本和长文本都要去重，经过测试长文本使用simhash效果很好，短文本使用simhash 准备度不高。
目前我们估算一下存储空间的大小，就以JAVA 来说，存储一个simhash 需...
How to debug a bash script? [closed]
...s after they are expanded and before they are executed. The value of the PS4 variable is expanded and the resultant value is printed before the command and its expanded arguments.
That much does not seem to indicate different behaviour at all. I don't see any other relevant references to '-x' in...
Python function global variables?
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423
If you want to simply access a global variable you just use its name. However to change its va...
count the frequency that a value occurs in a dataframe column
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446
Use groupby and count:
In [37]:
df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').coun...
Get Substring between two characters using javascript
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453
You can try this
var mySubString = str.substring(
str.lastIndexOf(":") + 1,
str.last...
Common elements comparison between 2 lists
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>>> list1 = [1,2,3,4,5,6]
>>> list2 = [3, 5, 7, 9]
>>> list(set(list1).intersection(list2))
[3, 5]
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How to select multiple rows filled with constants?
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SELECT 1, 2, 3
UNION ALL SELECT 4, 5, 6
UNION ALL SELECT 7, 8, 9
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