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Join strings with a delimiter only if strings are not null or empty
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Consider
var address = "foo";
var city;
var state = "bar";
var zip;
text = [address, city, state, zip].filter(Boolean).join(", ");
console.log(text)
.filter(Boolean) (which is the same as .filter(x => x)) removes all "falsy" values (nulls, undefineds, empty strings etc). If...
regex for zip-code
I need Regex which can satisfy all my three condtions for zip-code. E.g-
3 Answers
3...
Extract directory from path
...f the file I am working with. For example, the file = "stuff/backup/file.zip" . I need a way to get the string " stuff/backup/ " from the variable $file .
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Split string every nth character?
...on top. One could even write '.'*n to make it more clear. No joining, no zipping, no loops, no list comprehension; just find the next two characters next to each other, which is exactly how a human brain thinks about it. If Monty Python were still alive, he'd love this method!
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How to convert AAR to JAR
...consists of a JAR file and some resource files (it is basically a standard zip file with a custom file extension). Here are the steps to convert:
Extract the AAR file using standard zip extract (rename it to *.zip to make it easier)
Find the classes.jar file in the extracted files
Rename it as you...
How to download .zip from GitHub for a particular commit sha?
I want to download a .zip with the source of a library hosted on github, but I don't want the master, because every time I download I could be downloading a different version.
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How to avoid .pyc files?
...ric. I don't know if you realize this, but you can do the following:
$ unzip -l /tmp/example.zip
Archive: /tmp/example.zip
Length Date Time Name
-------- ---- ---- ----
8467 11-26-02 22:30 jwzthreading.py
-------- -------
8467 ...
What's the 'Ruby way' to iterate over two arrays at once
...actual = [ 120, 100, 50, 100 ]
=> [120, 100, 50, 100]
>> @budget.zip @actual
=> [[100, 120], [150, 100], [25, 50], [105, 100]]
>> @budget.zip(@actual).each do |budget, actual|
?> puts budget
>> puts actual
>> end
100
120
150
100
25
50
105
100
=> [[100, 120],...
成功熬了四年还没死？一个IT屌丝创业者的深刻反思 - 资讯 - 清泛网 - 专注C...
...了。3年后终于做到了五百万用户。对于年轻人来说，能把五百万人玩弄于鼓掌之间，已经是很牛逼轰轰的事了。
不过用户越多，成本越高。每年服务器、带宽租金、房租水电、广告运营等成本，已经达到了十七八万。
屌...
How to check if running in Cygwin, Mac or Linux?
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(SCO) UnixWare UnixWare
IBM AIX AIX
IBM i with QSH OS400
HP-UX HP-UX
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