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Differences between “BEGIN RSA PRIVATE KEY” and “BEGIN PRIVATE KEY”

... Copying the content from the above link for quick reference: #define PEM_STRING_X509_OLD "X509 CERTIFICATE" #define PEM_STRING_X509 "CERTIFICATE" #define PEM_STRING_X509_PAIR "CERTIFICATE PAIR" #define PEM_STRING_X509_TRUSTED "TRUSTED CERTIFICATE" #define PEM_STRING_X509_REQ_OLD "NEW CERTI...
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Foreign Key to multiple tables

...ot neither) was referenced by a single row. Here's how it could look when applied to your tables: CREATE TABLE dbo.[Group] ( ID int NOT NULL CONSTRAINT PK_Group PRIMARY KEY, Name varchar(50) NOT NULL ); CREATE TABLE dbo.[User] ( ID int NOT NULL CONSTRAINT PK_User PRIMARY KEY, Name...
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Is there a NumPy function to return the first index of something in an array?

... an index error if none exist) rows, columns = np.where(array==item); first_idx = sorted([r for r, c in zip(rows, columns) if c == 0])[0] – BrT Jan 15 '13 at 13:44 ...
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How can I find where I will be redirected using cURL?

... To make cURL follow a redirect, use: curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); Erm... I don't think you're actually executing the curl... Try: curl_exec($ch); ...after setting the options, and before the curl_getinfo() call. EDIT: If you just want to find...
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Environment variables for java installation

...ironment variables (== environment variables of type user variables) JAVA_HOME : C:\Program Files\Java\jdk1.8.0_112 JDK_HOME : %JAVA_HOME% JRE_HOME : %JAVA_HOME%\jre CLASSPATH : .;%JAVA_HOME%\lib;%JAVA_HOME%\jre\lib PATH : your-unique-entries;%JAVA_HOME%\bin (make sure that the longish your...
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What does @: (at symbol colon) mean in a Makefile?

...nd nothing gets done. For example (from Linux's scripts/Makefile.clean): __clean: $(subdir-ymn) ifneq ($(strip $(__clean-files)),) +$(call cmd,clean) endif ifneq ($(strip $(__clean-dirs)),) +$(call cmd,cleandir) endif ifneq ($(strip $(clean-rule)),) +$(clean-rule) endif @: ...
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mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to

... A query may fail for various reasons in which case both the mysql_* and the mysqli extension will return false from their respective query functions/methods. You need to test for that error condition and handle it accordingly. mysql_* extension: NOTE The mysql_ functions are deprecate...
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Getting a better understanding of callback functions in JavaScript

...epending how you call the function alert(this); }; callback(argument_1, argument_2); callback.call(some_object, argument_1, argument_2); callback.apply(some_object, [argument_1, argument_2]); The method you choose depends whether: You have the arguments stored in an Array or as distinct v...
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How to print SQL statement in codeigniter model

... To display the query string: print_r($this->db->last_query()); To display the query result: print_r($query); The Profiler Class will display benchmark results, queries you have run, and $_POST data at the bottom of your pages. To enable the p...
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Difference between std::result_of and decltype

I have some trouble understanding the need for std::result_of in C++0x. If I understood correctly, result_of is used to obtain the resulting type of invoking a function object with certain types of parameters. For example: ...