restrict

SQL SERVER - Trigger to restrict over 3 records

由 此生再无相见时 提交于 2020-04-30 07:05:06
问题 I am a beginner on SQL and need help setting a Trigger I need to set a trigger so that if 1 tutor has over 3 different schedule ID's this is not allowed!! Table TutorID/ScheduleID/Student 1 1 Tom 1 1 Harry 1 1 Lima 1 2 Zany 1 2 Logan 1 3 Zoe 1 3 Lana Tutor ID/ Tutor Name 1 Sam how can I restrict someone from inserting another class? 回答1: DISCLAIMER: To be completely honest I'm not convinced doing this through a SQL Trigger is the best solution, far better to control this sort of thing through

AngularJS 指令学习之一 指令简介

由 ▼魔方 西西 提交于 2020-03-01 23:04:42
1.什么是AngularJS的指令？ HTML元素由一个开始标签和一个结束标签组成，基于对此的理解，指令本质上就是AngularJS扩展具有自定义功能的HTML元素的途径。简单理解指令就是自定义的HTML元素和属性。 2.AngularJS指令的组成？ AngularJS指令包括内置和自定义指令，其中内置指令是打包在AngularJS内部的指令。所有内置指令的命名空间都使用ng作为前缀。 注 ： 为了防止命名空间冲突，不要在自定义指令前加ng前缀。 内置指令包括： ng-href , ng-src 是类布尔属性； ng-disabled ， ng-checked ， ng-readonly ， ng-selected ， ng-class ， ng-style 是布尔属性； 注 ：根据HTML标准的定义，布尔属性代表一个 true 或 false 值。当这个属性出现时，这个属性的值就是 true （无论实际定义的值是什么） 。如果未出现，这个属性的值就是 false 。 3.创建一个自定义指令 <html ng-app="myApp"> <!-- 应用的$rootScope --> <my-directive></my-directive> </html> 我们首先已经创建了一个完整的HTML的文档,其中包含了AngularJS,并且DOM中已经用ng-App标识出应用的元素

Do nvcc, gcc, clang and msvc “respect” the __restrict__ keyword within structs?

由 谁都会走 提交于 2020-01-14 04:38:08
问题 Suppose I have struct s { int* __restrict__ p1; double v; }; void foo(int* __restrict__ p2, struct s my_s) { /* ... */ } Do the C++ compilers listed below respect the __restrict__ keywords in this case, and assume memory accesses through p2 cannot affect accesses through p1 ? Obviously this is compiler-dependent, since restrict is not a C++ keyword. I'm mainly interested in the answer for gcc 4.9.x and nVIDIA CUDA 7.5's nvcc (when compiling device code of course, not when forwarding to a host

Can I `__restrict__ this` somehow?

由 三世轮回 提交于 2020-01-11 11:34:11
问题 I've been watching Mike Acton's talk on Data-oriented design in C++ in CppCon 2014, and he gives this example: int Foo::Bar(int count) { int value = 0; for (int i = 0; i < count; i++) { if (m_someDataMemberOfFoo) value++ } return value; } And explains how some compilers keep re-reading m_someDataMemberOfFoo in every iteration, perhaps because its value might change due to concurrent access. Regardless of whether it's appropriate for the compiler to do so - can one tell the compiler to

Banned words but not if with more words

由 坚强是说给别人听的谎言 提交于 2020-01-07 09:43:54
问题 I find solution, to ban some words if they are entered in input field. The problem is that i need ban them only when somebody use them as single word, not when are entered with more words. Example: If %bannedword% was entered then ERROR must show up, but if somebody write " %bannedword% wordnotbanned " all must be marked as correct input fill, without any ERROR. What i must do to everything works fine? Here is the jQuery $('#submit').click(function() { var bannedWords = ["black", "white"],

Banned words but not if with more words

由 夙愿已清 提交于 2020-01-07 09:43:27
问题 I find solution, to ban some words if they are entered in input field. The problem is that i need ban them only when somebody use them as single word, not when are entered with more words. Example: If %bannedword% was entered then ERROR must show up, but if somebody write " %bannedword% wordnotbanned " all must be marked as correct input fill, without any ERROR. What i must do to everything works fine? Here is the jQuery $('#submit').click(function() { var bannedWords = ["black", "white"],

Assigning a restrict-qualified pointer argument to a local restrict-qualified variable

由 佐手、 提交于 2020-01-05 10:23:33
问题 After reading the C standard, 6.7.3.1 "Formal definition of restrict ", i have the following misunderstanding. I wonder if the following code instantly causes undefined behavior: void foo(int *restrict p) { int *restrict q = p; } It is clear that q is assigned the value that is based on another restricted pointer p . What is unclear is if these two pointers are associated with the same block (the function itself), or with different blocks ( p with the function itself, q with its compound

Shapeless: restricting case class types

由 心已入冬 提交于 2020-01-05 01:37:14
问题 (NOTE: split from Shapeless: Trying to restrict HList elements by their type and Shapeless: own HList constraint using Coproduct ) Question 3 - restrict case classes by parameter types A very nice additional gain would be, if I could use HList constraints to constrain case class only to be built from AnyVals, Strings, and a specific MyBaseTrait, that recursively fulfill the same constraint. The constraint being defined on the base trait and not to have to touch any derived case class would be

Shapeless: restricting case class types

由 孤街醉人 提交于 2020-01-05 01:36:07
问题 (NOTE: split from Shapeless: Trying to restrict HList elements by their type and Shapeless: own HList constraint using Coproduct ) Question 3 - restrict case classes by parameter types A very nice additional gain would be, if I could use HList constraints to constrain case class only to be built from AnyVals, Strings, and a specific MyBaseTrait, that recursively fulfill the same constraint. The constraint being defined on the base trait and not to have to touch any derived case class would be

Restrict competition entry to once per day

由 荒凉一梦 提交于 2020-01-04 05:29:14
问题 I'm writing a PHP competition script for a members site that needs to restrict entries to one per day per member. So far I have the following MySQL code: SELECT ce_id FROM competition_entries WHERE ce_c_id = '$c_id' AND ce_sub_id = '$user_id' AND cte_date >= SYSDATE() - INTERVAL 1 DAY ce_c_id is the competition ID, ce_sub_id is the member ID, and cte_date is a MYSQL datetime stamp for the entry. It's hard for me to test from where I am now & I need to find a solution, so I'm hoping someone
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