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Please explain some of Paul Graham's points on Lisp
...nippet of Clojure code prints out aFOObFOOcFOO. Note that Clojure arguably does not fully satisfy the fourth point on your list, since read-time is not really open to user code; I will discuss what it would mean for this to be otherwise, though.
So, suppose we've got this code in a file somewhere an...
Test if executable exists in Python?
...mit my formulation was not clear enough in the fact that I know what which does).
– Piotr Lesnicki
Dec 18 '08 at 12:48
1
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What is the difference between the | and || or operators?
...l, but sometimes (rarely) it's a clean way to do stuff. The & operator does "run these 3 functions, and if one of them returns false, execute the else block", while the | does "only run the else block if none return false" - can be useful, but as said, often it's a design smell.
There is a Seco...
Excel to CSV with UTF8 encoding [closed]
...just tried a few characters and it works rather well.
NOTE: Google Sheets does have limitations when importing. See here.
NOTE: Be careful of sensitive data with Google Sheets.
EDIT: Another alternative - basically they use VB macro or addins to force the save as UTF8. I have not tried any of the...
Express.js: how to get remote client address
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Optional reading:
Use req.ip or req.ips. req.connection.remoteAddress does't work with this solution.
More options for 'trust proxy' are available if you need something more sophisticated than trusting everything passed through in x-forwarded-for header (for example, when your proxy doesn't rem...
Is it possible to set the equivalent of a src attribute of an img tag in CSS?
... @EricG, different applications have different requirements. If it doesn't suit your requirements, don't use it. If it does, use it.
– Pacerier
Feb 22 '13 at 12:17
4
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Xcode “Build and Archive” from command line
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Note that the archive action does not honor any settings you provide through this invocation, apart from the workspace and scheme — this has just cost me hours!
– danyowdee
Jun 6 '12 at 20:44
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How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
... not (like with pre 8.x versions) fileUploadListener
PrimeFaces 5.x
This does not require any additional configuration if you're using JSF 2.2 and your faces-config.xml is also declared conform JSF 2.2 version. You do not need the PrimeFaces file upload filter at all. In case it's unclear to you h...
Computed / calculated / virtual / derived columns in PostgreSQL
Does PostgreSQL support computed / calculated columns, like MS SQL Server? I can't find anything in the docs, but as this feature is included in many other DBMSs I thought I might be missing something.
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Why do people hate SQL cursors so much? [closed]
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the updated article does not correct the relative speed measurements, but it does provide some good optimizations and alternatives. Note that the original article says that cursors are 50 times faster than while loops, which is interesting
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