exists

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Javascript Finding if Function/Class exists before calling it

I know how to check to see if a property of the global context exists. Any variation of if (typeof myFunction != \'undefined\'){...}[详细]

2023-03-19 14:46 分类：问答
PHP Load Image if exist?

I am using this code for a slideshow: <img src=\"<?php echo($array[0]); ?>\"/> <img src=\"<?php echo($array[1]); ?>\"/>[详细]

2023-03-19 05:46 分类：问答
Shorthand function for checking whether a property exists [duplicate]

This question already has answers here: Test for existence of nested JavaScript object key (64 answers)[详细]

2023-03-17 16:44 分类：问答
Method to check files+folders tree if they exist

my Android application downloads ~50 mb of data - 2500 files. I want to check if a file is missing. An idea is to make a List with all the paths of the files, and then check each file if(File.exists()[详细]

2023-03-17 04:56 分类：问答
Isn't Android File.exists() case sensitive?

I\'ve created a new folder \"sdcard/dd\" by: File album = new File(albumPath); if (album.exists()) { Log.d(TAG, albumPath + \" already exists.\");[详细]

2023-03-16 06:52 分类：问答
Android Calendar

I am trying to put items into a calendar and can\'t really find out how to code it. This is what I have so far but it inserts it into the main calendar.[详细]

2023-03-12 20:21 分类：问答
Android: How to detect a directory in the assets folder?

I\'m retrieving files like this String[] files = assetFiles.list(\"EngagiaDroid\"); How can we know wheth开发者_如何学编程er it is a file or is a directory?[详细]

2023-03-11 22:57 分类：问答
Convert a two-table exists query from SQL to Linq using dynamic fields in the subquery

I\'m trying to query old Access database tables and compare them with SQL Server tables. They often don\'t have primary keys, or they have extra fields that had some purpose in the nineties, etc., or[详细]

2023-03-11 07:26 分类：问答
How do you use a T-SQL variable within an if OBJECT_ID to check if a table exists?

What I am trying to do with the following code is have it grab all the database names then loop through those databases check to see if the table tblAdminLogin exists and if it does update the passwor[详细]

2023-03-10 02:48 分类：问答
Check if file exists on FTPS site using cURL

I am using the cURL app to download multiple csv files. I want to find a way to check if the file开发者_如何学编程 exists on the ftps site before kicking off the download. If it doesn\'t exist I would[详细]

2023-03-05 07:42 分类：问答