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TYPESCRIPT, DART
version; typescript dart; version used 1.5: 1.10: show version $ tsc --version $ dart --version: grammar and execution; typescript dart; hello world $ cat hello.ts RELATIONAL DATA TOOLS: SQL, AWK, PIG full join. A full join is a join in which rows with null values for the join condition from both input relations are included in theoutput relation.
BUILD TOOLS: MAKE, RAKE, ANT, GRADLE make rake ant gradle; version used GNU Make 3.81: 0.9: 1.10: 4.0: show version make --version $ rake --version $ ant -version $ gradle --version: name of build file Makefile: Rakefile: build.xml PROLOG, ERLANG, ELIXIR If a comparison is performed on an integer and a float, the integer will be converted to a float. =:= and =/= do not perform conversions and thus will always return false and true respectively when called on an integer and a float. arithmetic expression. arithmetic operatorsRUST, SWIFT, SCALA
When the code is run "Java style", the code to be executed must be in the main method of an object with the same name as the file. When the code is run "Perl style" the statements o be executed should be at the top level outside of any object, class, or method. COMPUTER ALGEBRA I: MATHEMATICA, SYMPY, SAGE, MAXIMA delayed assignment. How to assign an expression to a variable name. The expression is re-evaluated each time the variable is used. mathematica: GNU make also supports assignment and delayed assignment, but = is used for delayed assignment and := is used for immediate assignment. This is the opposite of how Mathematica uses the symbols.FORTRAN, APL
Grammar and Invocation. file suffixes. The suffixes used for source files, header files, and compiled object files. fortran: The gfortran compiler will treat files with .f and .f77 suffixes as the older fixed format source code, and it will treat files with .f90 and .f95 suffixes as free format source code conforming to the 1990 and 1995Fortran standards.
DISTRIBUTIONS
issue tracker | content of this page licensed under creative commons attribution-sharealike 3.0 | content of this page licensed under creative commons attribution-sharealike 3.0 SCRIPTING LANGUAGES I: NODE.JS, PYTHON, PHP, RUBY ruby: puts appends a newline to the output.print does not.. write format to stdout. How to format variables and write them to standard out. The function printf from the C standard library is a familiar example. It has a notation for format strings which uses percent signs%.
LIGHTWEIGHT MARKUP: MARKDOWN, RESTRUCTUREDTEXT, MEDIAWIKI Markdown. Markdown. Markdown was developed in 2004, initially in Perl. It is used by Tumblr, Stackoverflow, GitHub, and Reddit. Here is a sandbox.. On Ubuntu you can install a script which converts Markdown to HTML with the following command:TYPESCRIPT, DART
version; typescript dart; version used 1.5: 1.10: show version $ tsc --version $ dart --version: grammar and execution; typescript dart; hello world $ cat hello.ts RELATIONAL DATA TOOLS: SQL, AWK, PIG full join. A full join is a join in which rows with null values for the join condition from both input relations are included in theoutput relation.
BUILD TOOLS: MAKE, RAKE, ANT, GRADLE make rake ant gradle; version used GNU Make 3.81: 0.9: 1.10: 4.0: show version make --version $ rake --version $ ant -version $ gradle --version: name of build file Makefile: Rakefile: build.xml PROLOG, ERLANG, ELIXIR If a comparison is performed on an integer and a float, the integer will be converted to a float. =:= and =/= do not perform conversions and thus will always return false and true respectively when called on an integer and a float. arithmetic expression. arithmetic operatorsRUST, SWIFT, SCALA
When the code is run "Java style", the code to be executed must be in the main method of an object with the same name as the file. When the code is run "Perl style" the statements o be executed should be at the top level outside of any object, class, or method. COMPUTER ALGEBRA I: MATHEMATICA, SYMPY, SAGE, MAXIMA delayed assignment. How to assign an expression to a variable name. The expression is re-evaluated each time the variable is used. mathematica: GNU make also supports assignment and delayed assignment, but = is used for delayed assignment and := is used for immediate assignment. This is the opposite of how Mathematica uses the symbols.FORTRAN, APL
Grammar and Invocation. file suffixes. The suffixes used for source files, header files, and compiled object files. fortran: The gfortran compiler will treat files with .f and .f77 suffixes as the older fixed format source code, and it will treat files with .f90 and .f95 suffixes as free format source code conforming to the 1990 and 1995Fortran standards.
DISTRIBUTIONS
issue tracker | content of this page licensed under creative commons attribution-sharealike 3.0 | content of this page licensed under creative commons attribution-sharealike 3.0 SCRIPTING LANGUAGES I: NODE.JS, PYTHON, PHP, RUBY ruby: puts appends a newline to the output.print does not.. write format to stdout. How to format variables and write them to standard out. The function printf from the C standard library is a familiar example. It has a notation for format strings which uses percent signs%.
LIGHTWEIGHT MARKUP: MARKDOWN, RESTRUCTUREDTEXT, MEDIAWIKI Markdown. Markdown. Markdown was developed in 2004, initially in Perl. It is used by Tumblr, Stackoverflow, GitHub, and Reddit. Here is a sandbox.. On Ubuntu you can install a script which converts Markdown to HTML with the following command:TYPESCRIPT, DART
version; typescript dart; version used 1.5: 1.10: show version $ tsc --version $ dart --version: grammar and execution; typescript dart; hello world $ cat hello.ts COMPUTER ALGEBRA I: MATHEMATICA, SYMPY, SAGE, MAXIMA delayed assignment. How to assign an expression to a variable name. The expression is re-evaluated each time the variable is used. mathematica: GNU make also supports assignment and delayed assignment, but = is used for delayed assignment and := is used for immediate assignment. This is the opposite of how Mathematica uses the symbols. OBJECT-ORIENTED C STYLE LANGUAGES: C++, OBJECTIVE-C, JAVA The compiler may have to allocate a temporary variable to hold the value of i - 1, which means the postfix version might be slower.. address. How to get the memory address for a variable. Memory addresses are stored in a type which records the type of the variable whose address was taken. RELATIONAL DATABASES: POSTGRESQL, MYSQL, SQLITE The latter form is perhaps preferred. The latter separates the join condition from the expression, keeping the expression simpler. Each JOIN clause must have an ON clause, reducing the chance of writing a Cartesian join by accident.FORTRAN, APL
Grammar and Invocation. file suffixes. The suffixes used for source files, header files, and compiled object files. fortran: The gfortran compiler will treat files with .f and .f77 suffixes as the older fixed format source code, and it will treat files with .f90 and .f95 suffixes as free format source code conforming to the 1990 and 1995Fortran standards.
JSON TOOLS: JQ
version; jq; version used 1.5: show version $ jq --version: grammar and execution; jq; interpreter $ cat > hello.jq "Hello, World!" # -n: use single "null" as input TERMINAL MULTIPLEXERS: SCREEN, TMUX Terminology. server | client | session | window | region | pane. how ssh works: When a user logs in to a remote host using ssh, the ssh process contacts an sshd process listening on TCP port 22. The sshd process opens up a new TCP port and forks off a copy of itself for communicating with the ssh process. The new port and child process are for the exclusive use of the connection being established. SCRIPTING LANGUAGES I: NODE.JS, PYTHON, PHP, RUBY ruby: puts appends a newline to the output.print does not.. write format to stdout. How to format variables and write them to standard out. The function printf from the C standard library is a familiar example. It has a notation for format strings which uses percent signs%.
DISTRIBUTIONS
issue tracker | content of this page licensed under creative commons attribution-sharealike 3.0 | content of this page licensed under creative commons attribution-sharealike 3.0 COMPUTER ALGEBRA II: PARI/GP, MAGMA, GAP, SINGULAR named groups. Some well-known groups can be specified by name. The symmetric group S n is the group of permutations on a set of n elements.. The alternating group A n is the group of even permutations on a set of n elements.. The cyclic group Z/n is a group generated by a single element of order n.It is Abelian group and is isomorphic to the integers modulo n under addition. PROGRAMMING LANGUAGES commonly used features in a side-by-side format. Scripting Languages I: Node.js, PHP, Python, Ruby: Scripting Languages II: Perl, Lua,Groovy
BUILD TOOLS: MAKE, RAKE, ANT, GRADLE A build tool executes a build script. An install copies files from a project to locations on the local host outside of the project. Alternatively an install creates links from locations on the local host outside of the project to files inside the project. A deploy places files from a project on a remote host. RELATIONAL DATA TOOLS: SQL, AWK, PIG MySQL 5.6 Reference Manual. SQL has been the leading query language for relational databases since the early 1980s. It received its first ISO standardization in 1986. SQL statements are classified into three types: data manipulation language (DML), data definition language (DDL), and data control language (DCL). C, GO - HYPERPOLYGLOTC GO CGOCS GO INSTALLSC GO GAMECS GO DOWNLOAD FOR PCCOUNTER STRIKE CS GO DOWNLOADCS GO FREE TO PLAY falsehoods. Values which evaluate as false in the conditional expression of an if statement.. logical operators. The logical operators. In all languages on this sheet the && and || operators short circuit: i.e. && will not evaluate the 2nd argument if the 1st argument is false, and || will not evaluate the 2nd argument if the 1st argument is true. If the 2nd argument is not evaluated, sideDISTRIBUTIONS
issue tracker | content of this page licensed under creative commons attribution-sharealike 3.0 | content of this page licensed under creative commons attribution-sharealike 3.0 PROLOG, ERLANG, ELIXIR If a comparison is performed on an integer and a float, the integer will be converted to a float. =:= and =/= do not perform conversions and thus will always return false and true respectively when called on an integer and a float. arithmetic expression. arithmetic operators PASCAL STYLE LANGUAGES: PASCAL, ADA, PL/PGSQL pascal ada plpgsql; version used Free Pascal 2.4: GNAT GCC 4.6 Ada 2012: Postgres 9.1: show version $ fpc -v $ gnatgcc -gnat12 --version $ psql --version: grammar and invocationRUST, SWIFT, SCALA
When the code is run "Java style", the code to be executed must be in the main method of an object with the same name as the file. When the code is run "Perl style" the statements o be executed should be at the top level outside of any object, class, or method. UNIX SHELLS: BASH, FISH, KSH, TCSH, ZSH bash, ksh, tcsh, and zsh will also perform variable expansion on anything that starts with a dollar sign and looks like a variable before each display of the prompt. bash, ksh, and zsh will also perform command substitution before each display of the prompt when they encounter the $ ( ) syntax in the prompt. COMPUTER ALGEBRA I: MATHEMATICA, SYMPY, SAGE, MAXIMA Mathematica, Sympy, and Pari/GP support the chaining of assignments. For example, in Mathematica one can assign the value 3 to x and y with: x = y = 3. In Mathematica and Pari/GP, assignments are expressions. In Mathematica, the following code is legal and evaluatesto 7: (x = 3) + 4.
PROGRAMMING LANGUAGES commonly used features in a side-by-side format. Scripting Languages I: Node.js, PHP, Python, Ruby: Scripting Languages II: Perl, Lua,Groovy
BUILD TOOLS: MAKE, RAKE, ANT, GRADLE A build tool executes a build script. An install copies files from a project to locations on the local host outside of the project. Alternatively an install creates links from locations on the local host outside of the project to files inside the project. A deploy places files from a project on a remote host. RELATIONAL DATA TOOLS: SQL, AWK, PIG MySQL 5.6 Reference Manual. SQL has been the leading query language for relational databases since the early 1980s. It received its first ISO standardization in 1986. SQL statements are classified into three types: data manipulation language (DML), data definition language (DDL), and data control language (DCL). C, GO - HYPERPOLYGLOTC GO CGOCS GO INSTALLSC GO GAMECS GO DOWNLOAD FOR PCCOUNTER STRIKE CS GO DOWNLOADCS GO FREE TO PLAY falsehoods. Values which evaluate as false in the conditional expression of an if statement.. logical operators. The logical operators. In all languages on this sheet the && and || operators short circuit: i.e. && will not evaluate the 2nd argument if the 1st argument is false, and || will not evaluate the 2nd argument if the 1st argument is true. If the 2nd argument is not evaluated, sideDISTRIBUTIONS
issue tracker | content of this page licensed under creative commons attribution-sharealike 3.0 | content of this page licensed under creative commons attribution-sharealike 3.0 PROLOG, ERLANG, ELIXIR If a comparison is performed on an integer and a float, the integer will be converted to a float. =:= and =/= do not perform conversions and thus will always return false and true respectively when called on an integer and a float. arithmetic expression. arithmetic operators PASCAL STYLE LANGUAGES: PASCAL, ADA, PL/PGSQL pascal ada plpgsql; version used Free Pascal 2.4: GNAT GCC 4.6 Ada 2012: Postgres 9.1: show version $ fpc -v $ gnatgcc -gnat12 --version $ psql --version: grammar and invocationRUST, SWIFT, SCALA
When the code is run "Java style", the code to be executed must be in the main method of an object with the same name as the file. When the code is run "Perl style" the statements o be executed should be at the top level outside of any object, class, or method. UNIX SHELLS: BASH, FISH, KSH, TCSH, ZSH bash, ksh, tcsh, and zsh will also perform variable expansion on anything that starts with a dollar sign and looks like a variable before each display of the prompt. bash, ksh, and zsh will also perform command substitution before each display of the prompt when they encounter the $ ( ) syntax in the prompt. COMPUTER ALGEBRA I: MATHEMATICA, SYMPY, SAGE, MAXIMA Mathematica, Sympy, and Pari/GP support the chaining of assignments. For example, in Mathematica one can assign the value 3 to x and y with: x = y = 3. In Mathematica and Pari/GP, assignments are expressions. In Mathematica, the following code is legal and evaluatesto 7: (x = 3) + 4.
TYPESCRIPT, DART
version; typescript dart; version used 1.5: 1.10: show version $ tsc --version $ dart --version: grammar and execution; typescript dart; hello world $ cat hello.ts RELATIONAL DATABASES: POSTGRESQL, MYSQL, SQLITE The latter form is perhaps preferred. The latter separates the join condition from the expression, keeping the expression simpler. Each JOIN clause must have an ON clause, reducing the chance of writing a Cartesian join by accident. SCRIPTING LANGUAGES I: NODE.JS, PYTHON, PHP, RUBY php: The mbstring package adds UTF-8 aware string functions with mb_ prefixes.. python: We assume that os, re, and sys are always imported.. Grammar and Execution. interpreter. The customary name of the interpreter and how to invoke it. php: php -f will only execute portions of the source file within a tag as php code.Portions of the source file outside of such tags is not 2D VECTOR GRAPHICS: POSTSCRIPT, SVG, IMAGEMAGICK line. How to draw a straight line. stroke width. How to set the stroke width for a path. line cap. How the end of a line is terminated. If the line cap is "circle" or "square", the geometric figure with the same diameter or side length as the stroke width is drawn, centered at the vertex where the line terminates. COMPUTER ALGEBRA I: MATHEMATICA, SYMPY, SAGE, MAXIMA Mathematica, Sympy, and Pari/GP support the chaining of assignments. For example, in Mathematica one can assign the value 3 to x and y with: x = y = 3. In Mathematica and Pari/GP, assignments are expressions. In Mathematica, the following code is legal and evaluatesto 7: (x = 3) + 4.
PASCAL STYLE LANGUAGES: PASCAL, ADA, PL/PGSQL pascal ada plpgsql; version used Free Pascal 2.4: GNAT GCC 4.6 Ada 2012: Postgres 9.1: show version $ fpc -v $ gnatgcc -gnat12 --version $ psql --version: grammar and invocation SCRIPTING LANGUAGES I: NODE.JS, PYTHON, PHP, RUBY ruby: puts appends a newline to the output.print does not.. write format to stdout. How to format variables and write them to standard out. The function printf from the C standard library is a familiar example. It has a notation for format strings which uses percent signs%.
FORTRAN, APL
fortran: Fortran uses integers which it calls unit identifiers for file descriptors. The unit descriptors 5, 6, and 0 are often but not always used for stdin, stdout, and stderr. Unit descriptors are provided as the first argument to read and write. If the first argument of read is an asterisk, it will use stdin. LIGHTWEIGHT MARKUP: MARKDOWN, RESTRUCTUREDTEXT, MEDIAWIKI Markdown. Markdown. Markdown was developed in 2004, initially in Perl. It is used by Tumblr, Stackoverflow, GitHub, and Reddit. Here is a sandbox.. On Ubuntu you can install a script which converts Markdown to HTML with the following command:JSON TOOLS: JQ
command line program. $ echo '1 2 3' | jq '. * .'. # no stdin: $ jq -n '1 + 1'. statement separator. A program consists of filter expressions separated by commas and pipes: , |. A filter expressions acts on its input and produces output. The pipe separator makes the outputHYPERPOLYGLOT
Programming Languages _commonly used features in a side-by-side format_ SCRIPTING LANGUAGES I: Node.js, PHP, Python, Ruby SCRIPTING LANGUAGES II:Perl, Lua, Groovy
GUI SCRIPTING:
JavaScript, Smalltalk, Tcl, AutoHotkey COMMAND LINE INTERPRETERS: POSIX Shell, Cmd.exe, PowerShell FORTH AND POSTSCRIPT:Forth, PostScript
PROLOG, ERLANG,
ELIXIR:
Prolog, Erlang, ElixirLISP DIALECTS:
Common Lisp, Racket, Clojure, Emacs LispC AND GO:
C, Go
OO C STYLE LANGUAGES: C++, Objective-C, Java, C#RUST, SWIFT, SCALA:
Rust, Swift, Scala
TYPESCRIPT, DART:
TypeScript, Dart
PASCAL STYLE LANGUAGES: Pascal, Ada, PL/pgSQL ML DIALECTS AND HASKELL: SML, OCaml, F#, Haskell NUMERICAL ANALYSIS & STATISTICS: MATLAB, R, NumPy, Julia COMPUTER ALGEBRA SOFTWARE I: Mathematica, SymPy, Sage, Maxima COMPUTER ALGEBRA SOFTWARE II: Pari/GP, Magma, GAP, SingularGNUPLOT AND GLPK:
Gnuplot, GLPK
FORTRAN AND APL:
Fortran, APL
PROGRAMMING TOOLS
UNIX SHELLS:
Bash, Fish, Ksh, Tcsh, ZshTEXT MODE EDITORS:
Vim, Emacs, Nano
VERSION CONTROL:
Git, Mercurial
BUILD TOOLS:
Make, Rake, Ant, GradleTERMINAL
MULTIPLEXERS:
Screen, Tmux
RELATIONAL DATABASES: PostgreSQL, MySQL, SQLite RELATIONAL DATA AND JSON TOOLS:SQL, Awk, Pig , Jq
LIGHTWEIGHT MARKUP:
Markdown, reStructuredText, MediaWiki, AsciiDoc, Org-mode2D VECTOR GRAPHICS:
PostScript, SVG, ImageMagickissue tracker |
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