conditional-statements

问题 I have a pandas dataframe I want to replace a certain column conditionally. eg: col 0 Mr 1 Miss 2 Mr 3 Mrs 4 Col. I want to map them as {'Mr': 0, 'Mrs': 1, 'Miss': 2} If there are other titles now available in the dict then I want them to have a default value of 3 The above example becomes col 0 0 1 2 2 0 3 1 4 3 Can I do this with pandas.replace() without using regex ? 回答1: You can use map rather as replace , because faster, then fillna by 3 and cast to int by astype: df['col'] = df.col.map(

问题 Why ng-if doesn't work for me in this example but ng-show does JSFiddle: <div ng-if="false">text</div> <div ng-show="false">text2</div> and how to fix that? 回答1: ngIf is a new directive added in v1.1.5. JSFiddle has you on 1.1.1. 来源： https://stackoverflow.com/questions/16777152/angularjs-ng-if-boolean-condition-doesnt-work

问题 Is there anyway to add a find condition to all Active record models? that is I would like this query ExampleModel.find :all, :conditions=> ["status = ?", "active"] to behave the same way as ExampleModel.find :all in every model Thanks!! 回答1: You could use default_scope: class ExampleModel < ActiveRecord::Base default_scope :conditions => ["status = ?", "active"] end If you want to use this in all your models, you can either subclass ActiveRecord::Base and derive from that in all your models

问题 This should be so simple, but it's not working for me. I want to say: If this doesn't have the class "current" AND if the body class does not equal "home", then do this.... Here is what I'm trying (among other things) to no avail. Only the first conditional works. $(".nav1 > ul > li").mouseleave(function() { if ( (!$(this).hasClass("current")) || (!$(body).hasClass("home")) ){ $(this).find(".nav-overlay").show(); } }); What am I doing wrong? Thank you! UPDATE FOR CLARITY: I only want to show

问题 I'm looking at using the new conditionals in Terraform v0.11 to basically turn a config block on or off depending on the evnironment. Here's the block that I'd like to make into a conditional, if, for example I have a variable to turn on for production. access_logs { bucket = "my-bucket" prefix = "${var.environment_name}-alb" } I think I have the logic for checking the environment conditional, but I don't know how to stick the above configuration into the logic. "${var.environment_name ==

问题 How do I create a new usermeta field with a drop down selection values? Im want to create a conditional statement for all users with a certain value of the new custom field I want. For example, The new field would be: Approved The drop down values are: Yes and No The conditional statement will recognize all users with the Approved field value of Yes. Then it will post a code. Im working with the wp_get_current_user function(), which does exactly what I need, but I just need a new custom

问题 I have a responsive website and I need some PHP conditions depending on the windows width (or media queries). Example: if ($window_width > 1400px) { echo 'Your window is wider than 1400px'; } elseif ($window_width > 1000px) AND ($window_width < 1399px) { echo 'Your window is between 1000px and 1399px'; } else { echo 'Your window is narrower than 1000px.'; } Thanks for your help! 回答1: check this Goolgle Mobile Detect Try to use http://www.php.net/get_browser and check for isMobileDevice field.

问题 I recently posed this question and thankfully was pointed to withRestarts() which seems pretty awesome and powerful to me :-) Now I'm eager to understand R's error handling capabilities in a bit more detail. Actual questions What is the recommended usage of simpleCondition() ? Never used it before, but I thought it might be useful for designing custom errors and warnings that are in fact "true" conditions. Could it be used to build a database of specific conditions for which specific handlers

问题 In C#, instead of doing if(index == 7 || index == 8) , is there a way to combine them? I'm thinking of something like if(index == (7, 8)) . 回答1: You can accomplish this with an extension method. public static bool In<T>(this T obj, params T[] collection) { return collection.Contains(obj); } Then... if(index.In(7,8)) { ... } 回答2: You could put the values that you need to compare into an inline array and use a Contains extension method. See this article for starters. Several snippets

问题 Im trying to add two conditions in filter but only one works. The first condition check if it has empty spaces between words and the second condition if words.length is bigger than the given minimum length. if the string is "hello world" then i need to get when i split it ["hello", "world"] . Instead of that I am getting ["hello", "", "", "", "world"] let wordsLength = sumOfSentence.split(" "); let longWords = wordsLength.filter(function(sumOfWord){ //check if the words length is bigger than