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Nov 8, 2013 · 29. <> operator means not equal to in MS SQL. It compares two expressions (a comparison operator). When you compare nonnull expressions, the result is TRUE if the left operand is not equal to the right operand; otherwise, the result is FALSE. If either or both operands are NULL, see the topic SET ANSI_NULLS (Transact-SQL). See here : Not Equal To.
May 14, 2019 · 93. ^[A-Za-z0-9_.]+$. From beginning until the end of the string, match one or more of these characters. Edit: Note that ^ and $ match the beginning and the end of a line. When multiline is enabled, this can mean that one line matches, but not the complete string. Use \A for the beginning of the string, and \z for the end.
Aug 1, 2019 · echo $? # echoes 0. false. echo $? # echoes 1. From the manual: (acessible by calling man bash in your shell) Expands to the exit status of the most recently executed foreground pipeline. By convention an exit status of 0 means success, and non-zero return status means failure.
Aug 18, 2009 · 35. Usage of javascript:void (0) means that the author of the HTML is misusing the anchor element in place of the button element. Anchor tags are often abused with the onclick event to create pseudo-buttons by setting href to "#" or "javascript:void (0)" to prevent the page from refreshing.
Jun 25, 2009 · Cascade word means waterfall. Not any waterfall. It's the one that has steps that consists of rocks. Now imagine that every step is representing a differently placed rule that can apply style to your HTML. When the water falls from one rock to another 'downwards' then it's not possible to go back with water 'up'.
Jan 31, 2011 · Unordered lists are often created with the intent of using them as a menu, but an li list item is text. Because the list li item is text, the mouse pointer will not be an arrow, but an "I cursor".
Nov 25, 2014 · 2. %>% is the pipe operator from magrittr, widely used in other Tidyverse and compatible packages. The basic way to understand it is it takes the left-hand side (LHS) and turns it into the first argument of the right-hand side (RHS). x %>% f(y) is special syntax that is essentially f(x,y).
Dec 11, 2008 · Reference: JavaScript Tutorial: Comparison Operators. The == operator will compare for equality after doing any necessary type conversions. The === operator will not do the conversion, so if two values are not the same type === will simply return false. Both are equally quick.
Aug 30, 2017 · Lexicographical order is the arrangement of given elements according to the English alphabets. An element is lexicographically smaller defines that particular element comes first in the English alphabets and lexicographically greater means that particular element comes later in the order of English alphabet.
Nov 23, 2009 · POSIX stands for Portable Operating System Interface, and is an IEEE standard designed to facilitate application portability. POSIX is an attempt by a consortium of vendors to create a single standard version of UNIX. answered Feb 26, 2019 at 5:44.
