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What is the most efficient way to loop through dataframes with pandas? [duplicate]
...r[1], ir[2]))
B.append(time.time()-A)
C = []
A = time.time()
for r in zip(t['a'], t['b']):
C.append((r[0], r[1]))
B.append(time.time()-A)
print B
Result:
[0.5639059543609619, 0.017839908599853516, 0.005645036697387695]
This is probably not the best way to measure the time consumption ...
using lodash .groupBy. how to add your own keys for grouped output?
...")
.pairs()
.map(function(currentItem) {
return _.object(_.zip(["color", "users"], currentItem));
})
.value();
console.log(result);
Online Demo
Note: Lodash 4.0 onwards, the .pairs function has been renamed to _.toPairs()
...
Python multiprocessing pool.map for multiple arguments
...ool.starmap(func, [(1, 1), (2, 1), (3, 1)])
M = pool.starmap(func, zip(a_args, repeat(second_arg)))
N = pool.map(partial(func, b=second_arg), a_args)
assert L == M == N
if __name__=="__main__":
freeze_support()
main()
For older versions:
#!/usr/bin/env python2
imp...
How to change a django QueryDict to Python Dict?
... the following:
# request = <QueryDict: {u'key': [u'123ABC']}>
dict(zip(request.GET.keys(), request.GET.values()))
{u'key': u"123ABC" }
# Only work for single item lists
# request = <QueryDict: {u'key': [u'123ABC',U 'CDEF']}>
dict(zip(request.GET.keys(), request.GET.values()))
{u'key':...
How do you migrate an IIS 7 site to another server?
...e -verb:sync -source:apphostconfig="Default Web Site" -dest:package=c:\dws.zip > DWSpackage7.log
To restore the package, run the following command:
msdeploy.exe -verb:sync -source:package=c:\dws.zip -dest:apphostconfig="Default Web Site" > DWSpackage7.log
...
Creating runnable JAR with Gradle
...a startup script that pulls it all together into a program you can run
distZip and distTar tasks that create archives containing a complete application distribution (startup scripts and JARs)
A third approach is to create a so-called "fat JAR" which is an executable JAR that includes not only your...
How to decompile an APK or DEX file on Android platform? [closed]
...m/showthread.php?t=2493107
Update 2015/12/04
ClassyShark you can open APK/Zip/Class/Jar files and analyze their contents.
https://github.com/google/android-classyshark
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...
Using python map and other functional tools
...sequence1, sequence2)
is mostly equivalent to:
[f(x1, x2) for x1, x2 in zip(sequence1, sequence2)]
(there is a difference in how it handles the case where the sequences are of different length. As you saw, map() fills in None when one of the sequences runs out, whereas zip() stops when the sho...
项目管理实践教程二、源代码控制【Source Control Using VisualSVN Server ...
...可能注意到了下图中的Groups，是的，你也可以先创建组，把用户添加到各个组中，然后对组进行授权，操作比较简单，在此略过。
按照下图所示，分别对用户【或组】进行授权：
点击"确定"按钮，上面的用户就具有了访问St...
几个有趣的Javascript Hack - 创意 - 清泛网 - 专注C/C++及内核技术
...任意网站，在地址栏输入以上代码，会发生当前网页已经变成编辑模式了。将上述代码中的true改成false重新执行一遍即可恢复。
2. 舞动的图片
javascript：R=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300; y4=200; x5=300; y5=200; DI=doc...