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Haskell composition (.) vs F#'s pipe forward operator (|>)
... x // or x |> exp
to make it compile. This also steers people away from points-free/compositional style, and towards the pipelining style. Also, F# type inference sometimes demands pipelining, so that a known type appears on the left (see here).
(Personally, I find points-free style unread...
String.IsNullOrWhiteSpace in LINQ Expression
...<string>(); var i = from m in my where !string.IsNullOrWhiteSpace(m) select m;
– Eric J.
Mar 7 '12 at 18:24
38
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REST URI convention - Singular or plural name of resource while creating it
...lf. For all I care the collections resource could be example.org/166316e2-e1and one particular item in that collection example.org/20d68348-ccc-001c4200de. The client should not construct URLs (that obviously doesn't scale, it isn't RESTful and that's what link relation types are for).
...
How random is JavaScript's Math.random?
...
90 have 2 digits
900 have 3 digits
1 has 4 digits
and so on.
So if you select some at random, then that vast majority of selected numbers will have the same number of digits, because the vast majority of possible values have the same number of digits.
...
Repeat each row of data.frame the number of times specified in a column
...es
library(dplyr)
df %>%
slice(rep(seq_len(n()), freq)) %>%
select(-freq)
# var1 var2
#1 a d
#2 b e
#3 b e
#4 c f
#5 c f
#6 c f
seq_len(n()) part can be replaced with any of the following.
df %>% slice(rep(1:nrow(df), freq)) %>% select(-...
Django Rest Framework File Upload
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From my experience, no special treatment is needed for file fields.
– x-yuri
Jan 6 '19 at 6:53
...
One-line list comprehension: if-else variants
...eed:
[ x if x%2 else x*100 for x in range(1, 10) ]
The confusion arises from the fact you're using a filter in the first example, but not in the second. In the second example you're only mapping each value to another, using a ternary-operator expression.
With a filter, you need:
[ EXP for x in ...
How can I hash a password in Java?
...ES,DESede,DES java_5/6/7:PBKDF2WithHmacSHA1,PBE (only in Java 5),PBEWithSHA1AndRC2_40,PBEWithSHA1And,PBEWithMD5AndTriple java_8:PBEWithHmacSHA224AndAES_128, PBEWithHmacSHA384AndAES_128, PBEWithHmacSHA512AndAES_128, RC4_40, PBKDF2WithHmacSHA256, PBEWithHmacSHA1AndAES_128, RC4_128, PBKDF2WithHmacSHA22...
How does RewriteBase work in .htaccess
...
For me, I missed RewriteEngine On. No need on 1and1 for example but it's required on my dedicated server.
– Portekoi
Nov 19 '18 at 16:41
add a com...
techniques for obscuring sensitive strings in C++
...ey1[n]
You can do this in your build environment, and then only store key1and key2 in your application.
Protecting your binary
Another approach is to use a tool to protect your binary. For instance, there are several security tools that can make sure your binary is obfuscated and starts a virtu...