1
0
mirror of https://github.com/adambard/learnxinyminutes-docs.git synced 2025-08-31 10:21:51 +02:00

Fix a bunch of typos

This commit is contained in:
HairyFotr
2017-08-23 10:14:39 +02:00
parent 9c5a67ca0f
commit 985d23a52b
47 changed files with 95 additions and 95 deletions

View File

@@ -6,7 +6,7 @@ contributors:
filename: learnkdb.q
---
The q langauge and its database component kdb+ were developed by Arthur Whitney
The q language and its database component kdb+ were developed by Arthur Whitney
and released by Kx systems in 2003. q is a descendant of APL and as such is
very terse and a little strange looking for anyone from a "C heritage" language
background. Its expressiveness and vector oriented nature make it well suited
@@ -301,7 +301,7 @@ l:1+til 9 / til is a useful shortcut for generating ranges
-5#l / => 5 6 7 8 9
/ drop the last 5
-5_l / => 1 2 3 4
/ find the first occurance of 4
/ find the first occurrence of 4
l?4 / => 3
l[3] / => 4
@@ -316,7 +316,7 @@ key d / => `a`b`c
/ and value the second
value d / => 1 2 3
/ Indexing is indentical to lists
/ Indexing is identical to lists
/ with the first list as a key instead of the position
d[`a] / => 1
d[`b] / => 2
@@ -406,7 +406,7 @@ k!t
/ We can also use this shortcut for defining keyed tables
kt:([id:1 2 3]c1:1 2 3;c2:4 5 6;c3:7 8 9)
/ Records can then be retreived based on this key
/ Records can then be retrieved based on this key
kt[1]
/ => c1| 1
/ => c2| 4
@@ -428,7 +428,7 @@ kt[`id!1]
f:{x+x}
f[2] / => 4
/ Functions can be annonymous and called at point of definition
/ Functions can be anonymous and called at point of definition
{x+x}[2] / => 4
/ By default the last expression is returned
@@ -440,7 +440,7 @@ f[2] / => 4
/ Function arguments can be specified explicitly (separated by ;)
{[arg1;arg2] arg1+arg2}[1;2] / => 3
/ or if ommited will default to x, y and z
/ or if omitted will default to x, y and z
{x+y+z}[1;2;3] / => 6
/ Built in functions are no different, and can be called the same way (with [])
@@ -472,7 +472,7 @@ a / => 1
/ Functions cannot see nested scopes (only local and global)
{local:1;{:local}[]}[] / throws error as local is not defined in inner function
/ A function can have one or more of it's arguments fixed (projection)
/ A function can have one or more of its arguments fixed (projection)
f:+[4]
f[4] / => 8
f[5] / => 9
@@ -483,7 +483,7 @@ f[6] / => 10
////////// q-sql //////////
////////////////////////////////////
/ q has it's own syntax for manipulating tables, similar to standard SQL
/ q has its own syntax for manipulating tables, similar to standard SQL
/ This contains the usual suspects of select, insert, update etc.
/ and some new functionality not typically available
/ q-sql has two significant differences (other than syntax) to normal SQL:
@@ -682,7 +682,7 @@ aj[`time`sym;trades;quotes]
/ where possible functionality should be vectorized (i.e. operations on lists)
/ adverbs supplement this, modifying the behaviour of functions
/ and providing loop type functionality when required
/ (in q functions are sometimes refered to as verbs, hence adverbs)
/ (in q functions are sometimes referred to as verbs, hence adverbs)
/ the "each" adverb modifies a function to treat a list as individual variables
first each (1 2 3;4 5 6;7 8 9)
/ => 1 4 7
@@ -762,7 +762,7 @@ select from splayed / (the columns are read from disk on request)
/ kdb+ is typically used for data capture and analysis.
/ This involves using an architecture with multiple processes
/ working together. kdb+ frameworks are available to streamline the setup
/ and configuration of this architecuture and add additional functionality
/ and configuration of this architecture and add additional functionality
/ such as disaster recovery, logging, access, load balancing etc.
/ https://github.com/AquaQAnalytics/TorQ
```