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How can you find the height of text on an HTML canvas?

...l it is. I know it's based on the font, but I don't know to convert a font string to a text height. 23 Answers ...
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Using jQuery to test if an input has focus

...ans and whatever you desire using the data() function. It's not just about strings :) $("...").mouseover(function () { // store state on element }).mouseout(function () { // remove stored state on element }); And then it's just a matter of accessing the state of elements. ...
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How to map calculated properties with JPA and Hibernate

...ect DATEDIFF(expiry_date,issue_date) from document_storage)") private String myColumn; the errors i get when i run and display my view even before trying to display the column on mustache is something like this java.lang.NullPointerException at java.base/java.lang.String$CaseInsensitiv...
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Can linux cat command be used for writing text to file?

...text, encompass the whole thing in single quotes. This is useful for .json and the likes, e.g. echo '{"info1": "123456"}' > info.json – bkd Nov 22 '18 at 14:11 ...
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EXC_BAD_ACCESS signal received

...hing back from just about anything else including factory methods (e.g. [NSString stringWithFormat]) then you'll have an autorelease reference, which means it could be released at some time in the future by other code - so it is vital that if you need to keep it around beyond the immediate function ...
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How can I inject a property value into a Spring Bean which was configured using annotations?

...e: @Value("#{systemProperties.databaseName}") public void setDatabaseName(String dbName) { ... } @Value("#{strategyBean.databaseKeyGenerator}") public void setKeyGenerator(KeyGenerator kg) { ... } systemProperties is an implicit object and strategyBean is a bean name. One more example, which wo...
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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...其他潜在性能优化技巧,具体如下探讨。 4-1 Android应用String/StringBuilder/StringBuffer优化建议 字符串操作在Android应用开发中是十分常见的操作,也就是这个最简单的字符串操作却也暗藏很多潜在的性能问题,下面我们实例来说说...
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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?

...cle Database 11g Release 2 and above - by default, no, but an alternative called edition-based redefinition exists Older versions of Oracle - no; DDL causes an implicit commit SQL Server - yes Sybase Adaptive Server - yes DB2 - yes Informix - yes Firebird (Interbase) - yes SQLite also appears to h...
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Coffeescript — How to create a self-initiating anonymous function?

... @scribu Well, those two statements are very different, and yours is actually the one that I should have given. Mine assigns the function -> console.log 'this runs right away' to f, then runs it; yours runs the function and then assigns its result to f, as in the original quest...
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“unary operator expected” error in Bash if condition

...rely on if [[ $aug1 == "and" ]]; to compare the value of $aug1 with the string and. If you use [ ... ], you always need to remember to double quote variables like this: if [ "$aug1" = "and" ]; If you don't quote the variable expansion and the variable is undefined or empty, it vanishes from t...