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Confusion between factor levels and factor labels
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HMAC-SHA1 in bash
...ipt.
[me@home] echo -n "value" | openssl dgst -sha1 -hmac "key"
57443a4c052350a44638835d64fd66822f813319
Or simply:
[me@home] echo -n "value" | openssl sha1 -hmac "key"
57443a4c052350a44638835d64fd66822f813319
Remember to use -n with echo or else a line break character is appended to the strin...
Way to read first few lines for pandas dataframe
...kes a long time to read, and occasionally only want to use the first, say, 20 lines to get a sample of it (and prefer not to load the full thing and take the head of it).
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Find rows with multiple duplicate fields with Active Record, Rails & Postgres
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227
Tested & Working Version
User.select(:first,:email).group(:first,:email).having("count(*)...
How to use ArgumentCaptor for stubbing?
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272
Assuming the following method to test:
public boolean doSomething(SomeClass arg);
Mockito d...
Why do I get the error “Unsafe code may only appear if compiling with /unsafe”?
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275
To use unsafe code blocks, the project has to be compiled with the /unsafe switch on.
Open th...
Wix: single MSI instead of msi + cab
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248
You didn't post any source but I assume your wxs file has a Media element. Just set the EmbedC...
Python dict how to create key or append an element to key?
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263
Use dict.setdefault():
dic.setdefault(key,[]).append(value)
help(dict.setdefault):
set...
HTTP Basic Authentication credentials passed in URL and encryption
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236
Will the username and password be automatically SSL encrypted? Is the same true for GETs an...
Find difference between timestamps in seconds in PostgreSQL
I have a table in PostgreSQL 8.3 with 2 timestamp columns. I would like to get the difference between these timestamps in seconds. Could you please help me how to get this done?
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